JPH01265241A - Camera - Google Patents

Abstract

PURPOSE:To simplify structure even when a lot of accessories are available by informing a camera main body of that an accessory is functioning when the accessory is loaded onto the camera main body and serves as it is. CONSTITUTION:When the accessory is loaded onto the camera main body and serves as it is, the effect is displayed. Therefore, a photographer can realize which accessory is loaded and functions and can take a picture according to the function. Since the display means is provided on the camera, no display means is provided on the accessory side. When many accessories are available, this advantage exhibits fully to simplify the structure of the entire camera. When an IC card is employed, display that the IC card is currently operating is carried out by means of indicating the card itself, which is easy for a photographer to realize the effect. Moreover, that display is very convenient to discriminate loading the card from loading the other accessories.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera, and more particularly to a camera to which accessories can be attached.

In recent years, it has been proposed to introduce IC cards into cameras to increase their functionality.

Problems to be Solved by the Invention Incidentally, even if such an IC card is attached to the camera body, the functions of the IC card may not necessarily be working. For example, if an operating member is provided that allows you to select whether to enable or disable the IC card function, if this operating member is used to disable the IC card function, the IC card function will be disabled even when the IC card is installed. Because it doesn't work. Furthermore, the function of the IC card does not work even if the IC card is not fully installed.

However, if it is not known from the outside whether the IC card's functions are working or not when the IC card is installed, the photographer should either control the IC card to control the camera itself, or control only the camera body without the IC card function. This is very inconvenient as you will be confused as to whether you should do this or not.

Furthermore, similar problems may occur with other accessories such as IC cards.

An object of the present invention is to provide a new camera that solves these problems.

In order to achieve the above-mentioned object of "・'", the present invention provides a determination means for determining whether or not the function of the accessory is working in a camera configured to allow attachment of the accessory;
A display means for indicating that the function is working when the determining means determines that the function of the accessory is working is provided.

In this case, the display means is provided on the camera body.

Further, the display means includes a display section and a display control means for controlling the display section based on the output of the determination means, and the display section is configured to exist only in the camera body and not in the accessory.

An IC card is used as the accessory. In this case, the fact that the function of the IC card is working is indicated by a display showing the card.

Function: According to this configuration, when the accessory is attached to the camera body and the function of the accessory is working, a message to that effect is displayed.

If the display means is provided in the camera body, there is no need to provide the display means on the accessory side, so especially when a large number of accessories are prepared, the display means can be attached to each accessory. Compared to the case where the camera is provided, the overall configuration of the camera can be simplified.

Furthermore, in the case of an IC card, displaying the card to indicate that its function is working not only makes it easier to understand, but also makes it easier to distinguish it from when other accessories are attached.

IL spots Embodiments of the present invention will be described below with reference to the drawings.

In the following explanation, the entire camera control system using an IC card will be described, and the display of whether or not the IC card function is working will also be explained.

FIG. 1 is a circuit block diagram of the camera of this embodiment. In the figure, (μC) is the control of the entire camera.

A microcomputer (hereinafter referred to as a "microcomputer") that performs various calculations has an E''FROM, and internal writing and reading can be performed freely.

(AFct) is a focus detection circuit that performs focus detection,
Consists of CCD, integral control circuit, and A/D conversion circuit.
Information on the subject is obtained for three distance measurement areas, which will be described later, and this information is A/D converted and output to a microcomputer (μC).

(LM) is a photometry circuit that performs photometry for four areas (described later), converts the photometry values into A/D, and converts the photometry values into microcontroller (μ
C) as luminance information. (orspC) is a display control circuit which inputs display data and display control signals from a microcomputer (IC) and causes a display unit (DISP) to perform a predetermined display.

In this example, there are two types of IC cards: a mode setting card that sets the camera mode and a program card that determines exposure. Only one of these cards can be installed in the camera, and the camera will Based on the specific mode, control the exposure program. This will be explained in detail later. (ST) is an electronic flash device, (IF) is an interface provided between the camera microcomputer (μC) and the electronic flash device (ST),
(STC) is a light control circuit that receives reflected light from a subject during flash emission that has passed through a photographic lens (not shown), and stops the flash emission when the appropriate exposure amount is reached. (LE) is a lens circuit provided in the lens and outputs information specific to the interchangeable lens to the microcomputer (μC) of the camera. (LECN) is a lens drive control circuit that drives the photographing lens based on focus detection information, (TVct) is a shutter control circuit that controls the shutter based on a control signal from a microcomputer (μC), and (AVct) is a microcomputer (μC) ), an aperture control circuit that controls the aperture based on a control signal from (M
O) is a motor control circuit that controls film winding and rewinding based on control signals from a microcomputer (μC). (BZ) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is a battery that serves as a power source, (0+) is a diode for backflow prevention, and (Cmu) is a backup capacitor for the microcomputer (μC), which has a large capacity. (R*) (
Cm) is a reset resistor and capacitor for resetting the microcomputer (μC) when the battery is installed.

(TrI) is a power supply transistor that supplies power to a part of the circuit described above.

Next, explaining the switches, (Sl) is a battery installation switch that turns OFF when a battery is installed.
When the battery is installed and the switch (slI) is turned off, the terminal (RE) of the microcomputer (μC) changes from "L" level to r.
A signal changing to H level is applied to the microcomputer (μC).
will execute the reset routine described below. (
Si+4) is a normally open exposure mode change switch, and the operation of this switch (Si+4) and the up switch (5) described later
The exposure mode is changed by operating the up) and down switches (5dn). (S8) is a normally open function change switch, and the operation of this switch and the up switch (S8)
Up) and down switches (5dn) are used to change functions (for example, switching between quick shooting and single shooting). (S
cn) is a normally open card function enable/disable switch that disables or enables the card function when the card is inserted.

(Sc++s) is a normally open card data setting switch that is operated when changing the mode setting or setting data necessary for the function when a mode setting card or function card (program card) is installed. .

(So) is a photometry switch that is operated to perform camera operations (for example, photometry and display of various data) other than autofocus (hereinafter referred to as rAFJ) operation.Simply by touching the release S opening (not shown), It consists of a touch switch that turns on. The above switch (SEX)
(SFX) (SCD) C3cns ) (SO)
If one of the switches is turned on, the microcomputer (μC
) executes the interrupt flow of (INT,) in FIG. 3, which will be described later. (Sl) is the AF that starts the AF operation.
It is a switch, and is turned on when the first stroke of the release button is pressed. (S is a release switch that is operated when performing a photographing operation, and is turned on when the second stroke (deeper than the first stroke) of the release button is pressed.

(Swm) turns ON when the film is wound for one frame.
It's Koma Switch.

(S□L) is a switch for performing AE flow (n exit tsuta), and is composed of a normally open bush switch. (SAF/M) is a focus adjustment mode changeover switch for switching between AF and manual focus adjustment.

(Sst) is a normally open change data selection switch for selecting data to be changed - (SFIIN) is a change data selection switch (SFIIN) that is used when a mode setting card is installed and the data setting mode is set. Ssz)
This is a normally open change data enable/disable switch that enables/disables the data selected by - C3tx
t) is a normally open exposure mode combination selection switch that selects the exposure mode combination when the mode setting card is installed and the data setting mode is set - (SFLH) indicates whether film is loaded or not. This is a film detection switch that is placed on the film rail surface near the spool chamber and turns OFF when film is present. (SaC) is a back cover close detection switch that turns OFF when ONL is opened when the back cover is closed. When this switch is turned ON, the microcomputer (μC) executes an interrupt routine to be described later. (
S□) is a switch for starting film rewinding, and when operated executes ONL and an interrupt routine to be described later, and turns OFF when the back cover is opened. (Scm) turns OFF when an IC card (CD) is inserted.
This is a C card installation switch, and when it is turned OFF, the I
Reset the microcomputer (μCZ) of the C card (CD). (X) is a so-called X contact, which turns ON when the shutter completes one curtain fastening, and turns OFF when a release member (not shown) is charged.

(Sup+) and (Sup*) are up switches that change or add data to be changed, and (Sdn
+)+ (Sdnz) is a down switch that also performs subtraction. Exposure mode is manual mode (M mode)
The above switches (Sup+), (Supz) + (Sd
n+).

(Sdnz) is a parallel switch, and when either the up switch (SLlp+) or (Sup, ) is pressed, it performs the up function, and the down switch (Sd
If either one of n+) and (Sdnz) is pressed, the down function is performed. When changing the aperture value or shutter speed in M mode, (Sup+) + (Sdn
1) respectively increase and decrease the aperture value, (Sup z
) + (S dnt ) function to increase and decrease the shutter speed, respectively.

In addition, in the following, when the up switch (Sup) is used, it refers to either the switch (Sup+) or (Supi), and similarly when the down switch (Sdn) is used, it refers to either the switch (Sdn I) l (Sdn). It refers to one side.Up switch (S
When the up) and down switches (Sdn) are operated, the terminals (lsup) and (Isdn) are set to "L", respectively.
It is detected when the level is reached.

In FIG. 1, a line (Ml
) is connected to the ground potential point (GND).

Table 1 summarizes the above-mentioned switches and their functions.

Next, before explaining the operation of the camera of this embodiment, two types of IC cards used here, namely a mode setting guard and a program card, will be explained.

(1) Mode setting card: This IC card allows you to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that are deemed unnecessary), or select the functions that are available in two types. The intention of the photographer by doing.

The aim is to provide cameras that are compatible with photographic techniques. Additionally, unnecessary functions can be omitted, resulting in a camera that is simplified and has good operability when changing modes. Next, the explanation regarding this card and the display contents performed for it will be explained.

First, to select the functions of this IC card, (i) 4
(ii) selection of exposure mode, (ij)
There are selections of the functions of the AE flock button, etc.

The four functions in (i) above are (a-1) Highlight reference/shadow reference exposure function (a-2) Exposure compensation function (a-3) Film advance mode switching function (continuous shooting/single shooting) (a-4) Spot AF/multi-point AF switching function, which allows the photographer to select the function necessary for the photographer. The display related to the selection is shown in FIG. 2 (
The items shown in b) are available. In FIG. 2(b), the functions (a-1) to (a-4) described above correspond in order from the left side. If the photographer does not require only the highlight reference/shadow reference exposure function (a-1), a display as shown in FIG. 2(C) is displayed.

For each selected function, the display regarding the use or switching of that function is as follows: Highlight criteria - Figure 2 (d) Shadow criteria - Figure 2 (e) Exposure compensation + side --- Figure 2 (f) Exposure compensation - side --- ---
・Fig. 2 (Continuous shooting mode ------Fig. 2 6) Single shooting mode ---Fig. 2 (i) Spot AF--・・--1--・・Figure 2 (j) Multiple points
AF-・-1------Figure 2). Regarding continuous shooting/single shooting and spot AP/multi-point AP, even if one of the functions (for example, quick shooting) cannot be switched, it is always selected. However, since switching is not possible, it is not displayed.

The display in FIG. 2 (ffi) shows that the exposure compensation function and the film winding mode switching function are selected, and that the exposure compensation + side and single shooting mode are controlled.

Next, the exposure modes related to the exposure mode selection in (ii) above are: (b-1) Program mode (P mode) (b-2) Aperture priority mode (A mode) (b-3) Manual mode (M mode) ) (b-4) There is a shutter priority mode (S mode), P mode must be turned on as a basic rule, and the remaining 3
It is possible to select combinations of three modes (A, M, and S modes). Therefore, there are eight combinations: AMS MS AS AM A SM (as shown in Figure 2). The display is performed as shown in FIG. 2(n), for example, and one selected exposure mode is displayed at the time of photographing [FIG. 2(0) (A mode selection)]. In addition, when in P mode, PROGRAM
is displayed [Figure 2 (p)].

Next, to select the function of the AE control button in (iii) above, (C-1) Hold the camera power in the AE control mode while pressing the AE control button (C-2) Press the AE control button once Press the AE flow button again in the AE flow state, or turn off the power hold.
Pressing F cancels the AE block state, and this display is not displayed during normal shooting. When the settings are made based on the card, the display is as shown in FIG. 2(q) in (C-1) and FIG. 2(r) in (C-2).

Note that the shutter speed and aperture value are normally displayed in this area as shown in FIG. 2 (S). In FIG. 2(S), 1000 is the shutter speed and 5.6 is the aperture value.

Next, as a choice between the two functions, (d-1) film counter forward calculation or subtraction (d-1)
2) With or without auto-return at the end of the film (d-3) At the end of rewinding, part of the film leader is rolled into the cartridge or left outside the cartridge (d-4) With or without a camera shake warning buzzer (BZ); There are 16 possible combinations, and numbers are given to the combinations as shown in Table 2, and 0 is displayed as shown in Figure 2 (1) at the time of setting and other times. During normal shooting, this part serves as a film counter.

(II) Program card: The program card is used to control exposure programs and various camera controls, which are designed to take pictures of moving subjects in relatively bright places with a high-speed shutter that prevents camera shake. (Details will be explained later).

Next, we will explain the operation of the camera using a microcomputer (μC) shown in Figures 3 onwards.
) will be explained based on the flowchart, and each part will be explained in detail as necessary.

When the battery (E) is installed, the battery installation switch (S■)
turns OFF, and the terminal (RE) changes from “L” level to rH.
'' level is input, the built-in clock starts oscillating, and the clock is also sent from the microcomputer (IC) to the IC card (CD) via the terminal (φ). Then, the microcomputer (μC) executes the routine (RESET) shown in FIG. In this routine, microcomputer (IC)
) first performs an initial setting (15) after the battery has been installed. This subroutine is shown in FIG.

In FIG. 4, the microcomputer (μC) prohibits all interrupts to this flow and sets all output terminals to the "L" level. Also, reset all the flags in the RAM and set the flag (BATF) indicating when the battery is installed (11
00-1110). This changes the exposure mode to P mode.
Spot/multi-point AF is set to multi-point AF mode, single shooting (S)/continuous shooting (C) is set to single shooting (S), exposure compensation, highlight (
II)/A mode in which shadow (S) is not performed is set. The contents of this functional data are shown in Table 3.

Next, check whether the mode setting card of the two types of IC cards mentioned above has been installed at least once and the mode setting has already been performed using the contents of the E''PROM (MSb as described later).

It is detected by examining the contents of If the settings have not been made, interrupts due to IC card insertion (CDIN
Disable interrupts other than T) and return (#135.
1140). If using the mode setting method, the contents of H"FROM (MSb described later) determine which mode is set.

~MSbs contents) to determine the part to display the changed data. Highlight/Shadow mode (H/S
mode), exposure compensation mode (+/- mode).

Single shooting/continuous shooting switching mode (S/C mode), spot/
Detect whether the mode is set in the order of multi-point AF switching mode (S/A mode), and if it is set, set change data for the first mode set (1145 to 1182), RA ? The change data of 1 and the setting mode data of E"FROM are shown in Tables 4 and 5. In terms of display, the steps (11145 to 1182) correspond to determining the position of a cursor, which will be described later.

Next, in order to display these setting modes, control is performed to send data to a display control circuit (DISPC).

First, set the terminal (C5DISP) to the rH level, notify the display control circuit (DISPC) of data communication, create data, perform serial communication, and when the data transfer is completed, set the terminal (C5DISP) to the "L" level. and outputs the end of serial communication to the display control circuit (DISPC) (
1185-1200).

To briefly explain the operation in the case of serial communication, first, a clock is output from the serial clock terminal (SCK) in response to a serial communication command. The output side outputs one bit of data in synchronization with the rising edge of this clock, and the input end inputs one bit of data in synchronization with the falling edge of the clock. By doing this as many times as necessary, the necessary data can be obtained.

An example of a display in a normal photographing state is shown in FIG. 2 (b).

In the example of Fig. 2 (u), the displayed contents include shutter speed (1000), aperture value (5, 6), and AE.
Mode (PROGRAM), number of films (with or without film) (17), and function mode (shape shown in the bottom row) are displayed. )
1 byte (8 bits 2
It is sufficient to prepare 56 different combinations. The display control circuit (DISPC) inputs these signals and decodes them to perform a predetermined display.

Now, the necessary data is the bit (MSbs) data in the E"PROM to display the shutter speed and aperture, and the bit (MSbs) data in the E"PROM to display the AE mode.
b, ~MSbs), E”FR is used to display the number of films.
OM bits (MSbq to MSbtz), E”PROM bits (M
Sbo~MSba), change data bit (CDb@
~CDbz), but the microcomputer (μC) processes these data and sends it as display control data to the display control circuit (D
ISPC).

An example of the display displayed on the display unit (DISP) in this manner is shown in FIG. 34(a), in which (1) is a cursor. The microcontroller (μC) is (11205) and is 0.
Wait 5 seconds and let this display run for 0.5 seconds. Then, the number of films stored in E'FROM is N+(MSb+
s~MSbl).

The contents of film sensitivity Sv (MSb+w to MSba,) are read out and transferred to the number of films NI+film sensitivity Sv in the RAM. Thereafter, card data communication 1 is performed to determine whether or not an IC card is attached and the type of IC card (1210).

This card data communication! The subroutine is shown in Figure 5(a).
Shown below. In the figure, first, a terminal (C5CD) is used to inform the IC card (CD) of communication with the IC card (CD).
) to rH level, set to data output mode, and send data indicating data communication I (see Table 6) to the IC card by serial transfer (11300 and 1305)
.

A microcomputer (μC) takes a certain amount of time to input this information on the IC card (CD) side, create the necessary data, and output it.
) waits (11310), and this time data is sent from the IC card (CD), so it operates in input mode and performs serial transfer with the IC card (CD) (1315).
), and when this is completed, the terminal (CSCD) is set to the "L" level (1320).

Next, the type of IC card is determined in (1321), but in the case of a mode setting card, the data only indicates the type of IC card, so the return is made immediately, whereas in the case of a program card, the data is Not only the type of IC card, but also continuous/AF mode
One shot (details later), AF zone spot/
Contains function data indicating multi-point, spot/multi-point metering zone, continuous shooting/single shooting, or nothing specified (setting by the photographer), so next check the card function. is selected (#322).

When the card function is selected (CDFNF = 1), the function data Fbz, Fbs, Fbe, Fb
Rewrite the +□ bit to set the data 1323),
Return. - On the other hand, if the card function is not selected, the process returns without rewriting the data.

Returning to Figure 4, the microcomputer (uc) determines whether or not the IC card is installed based on the input data (see Table 7), and if it is not installed (Ckbo = O), the microcomputer (uc) determines whether the IC card is installed or not (Ckbo = O). Returns without displaying the type. I
When a C card is installed (Ckbo = 1),
The type of IC card is determined and the mode setting card (Ckb
+~Ckb, =00+4, where 9 indicates hexadecimal)
In this case, the display data for this IC card (Ckbo~C
kb&) 11230), program card (
If Ckb+=Ckbi=OL), create program display data (CkbO to Ckb*) (1124
5). In these cases, the above data Ckb I to Ckbi and I are displayed as data on the shutter speed display section.
The C card installation data CkbO is set respectively, and the display data other than these is set to '0' (not set).

These display data are sent to the display control circuit (DISPC) (1250-1260) for a certain period of time (0.5 seconds).
Is displayed.

Figure 34 [Yes]) and (C) show display examples in this case, where the figure [Yes]) is the display when the program card is installed, and the same figure (C) is the display when the mode setting card is installed. It is. Here, the characters PRO and F-SE are the bits Ckb
CARD depends on Ckbo.

The microcontroller (μC) waits for a certain period of time for this display (
1270), then enable all interrupts (12
71), proceed to step (110) in FIG.

In FIG. 3, after completing the initial setting (#5), the exposure mode change switch (Si, ), function change switch (S□), card function enable/disable switch (SC1), card data setting switch (ScIl, ), It is determined in step (1110) whether any of the photometric switches (So) is turned on based on the level of the terminal (IPi), and if none of the above switches is turned on (IPs""' HJ), Battery installation flag (
BATF) is set or not in step (11).
5), and if it is set, after installing the battery,
Assuming that you came to this step without doing anything, step (1
Jump to step 45) and control the display to turn off and the IC card (CD) to stop according to the flow from step (1145). First, set all data to O" (not set) and use this data to control the display. Circuit (DISP
C) (1145-160). Therefore, the display is completely turned off. Note that a command for turning off all lights may be provided and outputted to the display control circuit (DrSPC) so that the display control circuit (DISPC) turns off all lights in response to this.

The microcomputer (μC) sends the light-off data to the display control circuit (DISPC) as described above, and then sends a sleeve sign (instruction to stop the IC card) signal to the IC card (CD) (I65 to I75). This sleeve sign is constructed by bits Csb and Csb both becoming l as shown in Table 6.

After that, the transistor (Tr+) is turned off by setting the terminal (PW) to "L", and the flag indicating the AE clock (8ELF) and the flag indicating when the battery is installed (BAT) are turned off.
CM'17 to CM'95), which resets each of F), enables all interrupts, and stops, and this stop (I(ALT)
This also stops the internal clock oscillation.

In the above step ($10), five switches (S
IN), (Srs), (Sco), (ScDt
), (So), the process proceeds to step (1190), and a flag (B) indicating that the battery is installed is set.
ATF) and the next step (sto
At step o), set a flag (OFF) indicating that one of the five switches mentioned above has been operated, and proceed to the routine [SO]
is executed, and the process returns to step (110). The routine [SO] is a routine for performing photometry, AF, display, exposure control, etc., which will be described in detail later.

In step (1110), if none of the five switches are turned on and the battery is not installed (BATF = O), the flag ( OFF) is set (1115.125). When this flag is set, the timer (r+) for power retention is reset and started, and the flag (OFF) is started.
(1130.1135). Here, the timer (T1) is reset and started (130) from -degree steps (1110) to (190) (110
0) and went through the routine (1100), but currently none of the five switches are pressed, but this is done in order to extend the power retention for a certain period of time in consideration of the possibility that they may be turned on again. Yes, the flag (OFF) is reset (1135) to indicate that step (130) has been passed.

In step (125), if the flag (OFF) is not set, step (130) (13
Skip step 5) and detect whether 10 seconds have elapsed for the reset-started timer described above140), 1
If 0 seconds have elapsed, the process proceeds to steps after (145) to turn off the display and stop the IC card (CD). 10
If the second has not elapsed, step (1110) is entered and the routine of (SO) is repeated.

Next, I will explain the control of the camera when an IC card (CD) is installed.
A signal that changes from the "L" level to the "H" level is input to the NT), and the interrupt routine (COINT) shown in Figure 4 is executed.When this routine is entered, the microcomputer (μC) starts driving the lens. Set the flag (OFF) to stop and maintain power (1290.1292)
, and then set the flag (C) to forcibly add the card function.
DFNF) should be set (1293), and in the display control described later, a flag (1293) should be set so as not to display the card type.
CDIF) (1294). By setting this flag, the type of installed card is always displayed the first time in the routine [SO] after card installation. Next, the display of the type of installed card is given top priority. Steps (12)
95), all other interruptions to this flow are prohibited and the process proceeds to step (1210) and subsequent steps, and the type of IC card is displayed for a certain period of time as shown in FIG. 34(b) or (C) as described above. Thereafter, all interrupts are enabled, and the process returns to the original flow (step (130) in FIG. 3). switch (S) with that interrupt enabled.
yx), (Sr, 4).

If any one of (Sco), (Scos), and (So) is turned on, the interrupt pin (INTO) is output as “H”.
When a signal transitioning from the ``'' level to the ``L'' level is input, the interrupt (INT, ) operation shown in FIG. 3 is entered, and the flow from step (190) onwards is executed.

In addition, in the stopped state (HALT), any interrupt (INTO) (INTz) or (COINT)
The clock is designed to start oscillating even when the clock is turned on, and the clock (φ) is also sent to the IC card (CD).

Next, the above routine (SO) will be explained with reference to FIG.

First, interrupts of (INTO1) for this flow are prohibited (1400). This is because if the interrupt (INT, ) shown in FIG. 3 occurs during this control, the control operation will not proceed further. Next , (1405) microcontroller (μC)
Set the terminal (4) of the inverter (IN+) to "H" level.
) by applying a low level to the base of the PNP transistor (Tr+).
+) to ONL, photometric circuit (LM), AF circuit (ap
Information specific to the interchangeable lens is input from the zero-order lens circuit (LE) that supplies power to the lens circuit (1410).

This is shown in FIG. 7 and explained. First, the terminal (CSLE
) is set to "H" level (1600), and serial communication is performed to input information from the lens (1605).
o) + maximum aperture value (Avmax) + distance information, focal length information, a coefficient for converting the defocus amount into a lens drive amount (hereinafter referred to as "K value"), etc. After inputting the lens information, the terminal (C3LE) is set to the "L" level and the process returns (1610).

Returning to FIG. 6, the microcomputer (μC) continues to input electronic flash device information from the electronic flash device (ST). The information includes a guide number (GN) that indicates the amount of light emitted,
There are three types of information: whether the battery is in a fully charged state, whether it is in forced light emission, or whether it is in automatic light emission (this will be described later). Here, we will explain the operation of the information communication method.First, Fig. 9(a) shows an electronic flash device (ST),
FIG. 9 (0)) shows a circuit diagram of the interface (IF), and FIG. 8 shows a flowchart for inputting data from the electronic flash device of the camera.

In Figure 8, the microcomputer (μC) has a terminal (C3ST
) is kept at rH level for a certain period of time (1+), and this signal is output to the electronic flash device (ST) (1650). The electronic flash device (ST) detects the time (t) of this signal, recognizes the data output mode, and outputs data in accordance with the clock from the microcomputer (μC) (1655).

In the interface circuit (IF) shown in FIG. 9(b), the signal from the terminal (C5ST) of the microcomputer (IC) is passed through the OR circuit (OR1,) to the terminal (ST l) of the electronic flash device.
). At this time, both signals input to the OR circuit (ORz+) are at the "L" level. In the electronic flash device (ST), a signal from the terminal (ST + ) is input to the AND circuit (AND++), so the AND circuit (AND■) becomes active and the oscillation circuit (O3C
) is output to the counter (CNT+□).

The counter counts this and measures the time (t,).

When the time (t,) is counted, the terminal (T,) is brought to rH level and the RS flip-flop (SR, , ) is set.

At this time, the RS flip-flop (SRI□) remains reset, and its output is at the "H" level. Therefore, the AND circuit (AND+g) becomes active.

Next, the microcontroller (μC) uses a serial communication clock (
SCK). This clock (SCK) is output to the terminal (ST+) of the electronic flash device (ST) via the OR circuit (oRz+) of the interface circuit (IP). In an electronic flash device (ST), the input clock (
SCK) is connected in parallel/through an AND circuit (AND+z).
It is input to the clock terminal of the serial conversion circuit (P/S). This parallel/serial conversion circuit (P/S) outputs a guide number (GN), a signal 9 indicating a charging completion state, and a signal indicating forced light emission or automatic light emission in synchronization with the clock. Electronic flash device (ST) counter (CNT++
) counts the input clock (to SC), and when a predetermined required number is counted, the rH and level are output to the OR circuit (O
R,, ). This signal is an OR circuit (OR++
), is input to the reset terminal of the counter (CNT + z) through the one-shot circuit (O3++), and the counter is reset. The counter (CNT11) is a counter that is reset after counting a predetermined number of clocks.

In addition to the above-mentioned circuit elements, the electronic flash device includes a battery (Esy) as a power source, a booster circuit (IIV) for boosting the voltage of the battery to the voltage required for flashlight emission, and a voltage from this booster circuit (UV). A rectifier diode (Dll) that rectifies the output voltage, a main capacitor (MC) that stores the energy necessary for flash light emission, and the main capacitor (
A charging voltage detection circuit (CVD) that detects the charging voltage of
), a light emission control circuit that controls the start and stop of light emission (
FCC).

Returning to FIG. 6, after the microcomputer (μC) inputs the above flash data, it performs card data communication I with the IC card (CD) to determine the type of the IC card (CD) (11420). Since this card data communication (2) has already been explained with reference to FIG. 5, the explanation will be omitted here. After communicating the card data, it is determined whether the flag (SETF) indicating that the IC card is inserted and the data setting mode is set is set (114).
25), and if it is not set, check whether the AF start switch (Sl) is turned on or not by checking the terminal (IP).
, ) (1427). When the above switch (Sl) is turned on (IF6 = '
L level), AF control is performed (1429). On the other hand, when the flag (SETF) indicating the data setting mode is set or the switch (S+) is set to 0FF (
IP&-r HJ level), in order to prohibit AF operation, a signal to stop the AF drive motor is output to the lens control circuit (LECN) to stop the lens drive.
31), flag indicating that AF is not being performed (8FN
F) (1435). When the data setting mode is set in this way, AF control is prohibited and data setting is prioritized, so even if the AF start switch (Sl) is pressed by mistake during data setting, AF operation will not be performed. That's what I do.

Here, the flowchart shown in FIG. 10(a) and FIG. 10(b) regarding the above-mentioned AF control will be explained with reference to FIG. 11 showing the focus detection range in the photographic screen.

At that time, the photometric range will also be explained.

First, in FIG. 11, the outer rectangle (2) indicates the photographing screen. Among them, (LMI) to (1M4) indicate the photometry range, and (API) to (^pi) indicate the focus detection range.

Regarding the focus detection range, the camera has a spot/focus detection range.
Multi-point AF can be switched. When spot AF is selected, AF is performed based on subject information in the focus detection range (AFL), and when multi-point AF is selected, AF is performed based on the subject information in the focus detection range (AFL). AF is performed to focus on the subject closest to the camera from among I) to (AFi). Hereinafter, (API) is the first island, (AP
, ) will be called the second island, and (AF3) will be called the third island.

AF! shown in the flowchart of FIG. 10(a)! II?
To explain step 111, first, it is determined whether or not the lens is attached based on the input signal from the lens (step 1
705). Next, if a lens is attached, it is determined whether the focus adjustment mode is the AF mode based on the level of the terminal (IPI.) (11710). Then, in step (+1705), the lens is not attached, or (11710), it is not in AF mode (manual mode).

IP+o=rHJ level), a flag (AFNF) indicating that AF is not being performed is set and the process returns (11800).

On the other hand, when the AF mode is selected (IPI6="
"L" level) resets the flag (APNF) indicating that AF is not being performed (015), and the microcomputer (μ
C) controls the accumulation (integration) of charges generated according to the amount of incident light in the COD for distance measurement, and after the integration is completed, the data obtained by digitally converting the integral value is input (11
720.1725). Then, it is detected whether it is spot AF or not (detected by Fb of the function data), and spot AF is detected.
If (Fb book = 1), based on the second island,
Set a flag (AP2F) indicating that AF is being performed, calculate the day focus amount (DFz) of the second island from the input data, and use this as the defocus amount for lens driving (1735 to 11745) .

On the other hand, when the multi-point AF mode is selected, the first
．． Second. 3rd Island Day Focus I (OF)
Calculate the amount of day focus for the subject closest to the camera among the above (It750 to 1765
), and the subroutine for determining the day focus amount is shown in FIG. If the subject is closer to the camera than the focus position of the lens, the amount of day focus is positive, and its absolute value indicates the size of the day focus.To detect the subject closest to the camera, it takes 3 It is sufficient to detect the maximum (including positive and negative) day focus amount among the day focus amounts of the two islands, and it is assumed that the main subject exists in the focus detection area.

In Fig. 10(b), the microcomputer (μC) first resets the flags indicating islands (FIF to F3F), detects the largest day focus island, and transfers the detected island day focus amount to the lens drive flag. As the focus amount, use the above flag (
AFIF-AF3F) and return (18
10-11865).

Returning to FIG. 1O (a), the microcomputer (μC) determines whether or not the focus is on based on the lens drive day focus amount (11770
), and if the focus is determined, a flag indicating the in-focus status (
AFEF) (1780). Then, the focus buzzer will sound for a certain period of time to notify you of this (1782).
Return. If it is not in focus in step (1770), either one-shot AF (-once in-focus stops subsequent lens driving, and focus detection may also be stopped at this time) or continuous AF (after in-focus, In the case of one-shot AF (pba=o ) Flag indicating focus (AFEF)
) is set or not using (1783),
If set, return. If it is not set or if continuous AF is used (Fb
If s = 1), the process proceeds to step (1785) and lens drive control is performed. In step (11785), drive the lens! (N) is calculated by multiplying the defocus amount (DF) by the value, and then in step (179
0) to drive the lens, and step (1179
In step 5), the flag (AFEF) indicating focus is reset and the process returns. In addition, in the lens drive in this step (11795), the lens drive circuit (LECN) performs the above drive amount (
This is done by driving the lens by a value corresponding to N).

Returning to FIG. 6 again, the microcomputer (μC) controls changes to various data by operating various key switches (11440).

To explain this as shown in FIG. 12, first, the state of each key switch is checked and this is stored in memory (+1900).

Next, set the flag (SET) indicating that the card is in card setting mode.
It is determined in (11905) whether or not F) is set, and if the flag (S[1TF) is set, the process proceeds to step (11930) so as not to change the exposure mode or function. If the flag (SETF) is not set, the process advances to step (1910) and it is determined whether the exposure mode change switch (St+4) is turned on. Here, the 1 switch (SE+4) is O
When N is selected, this change subroutine (#9
Proceed to step 15) and return (details will be described later). If the above switch (StM) is not turned on, proceed to step (
1920), it is determined whether the function change switch (S□) is turned on. And this switch (SF
If M) is ON, the process proceeds to the subroutine for that change (#925) and returns.

Here, the above two subroutines are shown and explained in FIGS. 13 and 14, respectively. First, the exposure mode is changed.
Each time the amplifier switch (Sup+ or 5upz) is turned on, it progresses cyclically from P to A-+S-+M and then back to P, and then turns on the down switch (Sdn
, or 5dnz) is turned on once, P4-A
4-34-M, and then P and then M, cyclically in the opposite direction to the up direction, but depending on the exposure mode set by the IC card (CD). The mode will be changed accordingly, and unselected modes will be skipped.

To explain this with reference to FIG.
) determines whether the up switch (Sup+ or 5upz) is turned on in step (111000), and if it is not turned on, the step (+110
Proceed to step 55). When it is ON, step (11)
1005) and the RAM function data (Fbn) (
Fb. Internal E”F
(Msba) ~ (Msbs) of ROM (see Table 4)
If it is selected, change the exposure mode from P to A and change the function data (Fbo, Fbl) to (0,0
) to (0,1) and return (11015)
. In step (11010) above, when it is determined that A mode is not selected by the IC card, the process proceeds to step (11025), where it is determined whether S mode is selected, and if S mode is not selected here, Then, the process further advances to step (111040) to check whether the M mode is selected and sequentially search for modes selected by cards. Then, if there is a selected mode, it is set. And A, S
, when M mode is not selected, that is, when only P mode is selected, it becomes P mode (+1050)
.

Similarly, when A mode is currently selected as the control exposure mode (Fbo, Fbl = O, l), the IC
Determine whether S mode is selected by the card, or if not, whether M mode is selected,
Change the exposure mode to the selected mode and press Bit (F
bo), (Fbl) and return (11
1020-1030).

Now, when S mode is selected as the control exposure mode (Fbo, Fbl = 1.l), M mode is
Determine whether it is selected by the C card, if selected, set to M mode, if not selected,
Return to P mode (HO35-1045)
, when the control exposure mode is not S mode, that is, when it is M mode, then P mode is selected. This is because the P mode is always selected in this embodiment.

In step (111055), the down switch (S
When the dn or 5dnz) is turned on, the same control as the up switch (Sup (or Sup) described above is performed, except that the direction of changing the exposure mode is different), so a description thereof will be omitted.

In addition, both switches (Sup) (Sdn) are OFF.
If F, do nothing and return.

Next, the control when the function change switch (S,) shown in FIG. 14(a) is turned on will be explained. The microcontroller (μC) performs the four functions mentioned above, namely highlight/shadow (H
/S), exposure compensation (+/-), single shooting/continuous shooting (S/C)
, Spot AF/Multi-point AF (S/A) is selected using the E"FROM bit (MS
If none of these bits are set, it is determined that there is no mode selection and the process returns (11200). If at least one is set, at least one mode is selected, and the step to change data (11205)
Execute the following flow. The microcomputer (μC) determines whether the switch (Sst) indicating the function to be changed is turned on, and if it is turned on, the function to be changed is H/S→+/−→S/C. -+S/^, then returns to S/A, then H/S, and so on, but if no function is selected by the IC card,
It's like jumping over that.

In step (11210), if the function to be changed now indicates 11/S mode (RA shown in Table 5)
H data CDbo, CDb+, CDbz=0.0. O
), 10/- mode is selected by the IC card at step (11215).
Sb I), and when +/- mode is selected, the data change mode is +/- mode, and data CDbo~cobz=o.

Returns as 0.1 (111220). +7-
If no mode is selected, step (mt227
) and check whether S/C mode is selected (MS
bz), and when this is also not selected (M
Sb2=0), proceed to step (11240) and set A/
Determine whether S mode is selected by (MSbz), and if it is not selected (MSbs=0),
Further, the process proceeds to step ($1250) to determine whether the l/S mode is selected (MSbO). Now, at least l/S mode is selected, so we need to change the function of l/S mode (, CDb, ~cab, = 0.0
．． Set to 0. S/C mode.

When the A/S mode is selected, CDbO to CDb 2 are set to change this mode.

Similarly, the next mode (
+/- mode for l/S mode, S/- mode for 10/- mode.
C mode, S/C mode is S/A mode, S/^
If mode, L/S mode) is selected by the card, and if it is selected, change mode is set to the next mode, and if not selected, H/S→+/−→
The function selected by the IC card is searched in the order of S/C-+S/A→H/5----------, and the selected function is set as the function to be changed to data CDb, ~CDb,
Set and return.

As can be seen, modes not previously selected by the card will be skipped with respect to the change mode. For example, if the selected changeable mode is +7- and S/C
If the function change switch (S8) is pressed, the flow goes to step (11225), and then to step (#1227), where the S/C mode becomes the mode to be changed. On the display, this means that the cursor moves from 10/- to S/C. Next, when the function change switch (srH) is pressed again, the flow goes to step (111235) and from there to step (
11240)→($1250)→(薯1215), 10/- becomes the mode to be changed, and the cursor on the display moves to +/-. In these cases, l/S mode and A
Since the /S mode is not selected, it is effectively skipped in terms of setting the change mode.

In step (111205), switch (Ssx
) is not ON, step (111265
).

In step (11265), the up switch (Sup+
or 5upz) is turned on, and if it is turned on, it is determined from the data (CDbo to CDbz) which function should be changed now, and if it is in l/S mode, all settings are changed. data (Fb,)
Judging by (Fb,), the next mode (→H-+S
Set the data (FbJ, (Fbt) +11270.
#1275), return.

If the function is 10/- mode (11285), 0.5 is added to the exposure correction amount (ΔEv), and the process proceeds to a subroutine (m1287) for determining the magnitude. This subroutine is shown in FIG. 14(b). If the correction amount (ΔEv) is positive, the data Fb, , Fbs = 0.1 is considered as a positive correction.
For negative side correction, data Fbn, Fbs=1.
0, and if the correction is zero, no correction is made, data Fig, Fbs = 0.0, and return (1
1350-11370).

Returning to Figure 14(a), if it is S/C mode, it is determined whether the current mode is single shooting (S) or continuous shooting based on the data (Fbl), and the current mode is set to be the opposite of the current mode. Change the data (11295) and return. When it is not in any of the above three modes (H/S mode, +/- mode, S/C mode), that is, when it is S/A mode, the current mode is Spot AP (S) or Multi-point AP (A). Determine whether it is by data (Fb), and change the data (Fb) so that it is opposite to the current mode.
), return.

In step (111265>, the up switch (S
If the down switch (upl or SLI+) is not turned on, the process proceeds to step (#1305), where it is determined whether the down switch (Sdn+ or Sdn*) is turned on, and if it is not turned on, the process returns. If it is turned on,
When changing the mode within H/S mode, the order of change must be reversed (←H4-34-No H/S←), and if it is in 10/- mode, the exposure compensation amount (8εV) must be changed. 0.
Except for pulling 5Ev, use the above-mentioned up switch (Sup
+ or 5upt) is ON, so the explanation will be omitted (111310 to 11340).

Returning to FIG. 12, expose mode change switch (S□).

When both function change switches (S) are OFF, the aperture value (Ay) is changed by the up switch (Sup1, 5upt) and down switch (Sdn, 5dnz).
The process advances to step (11927) showing a subroutine for changing the shutter speed (Tv).

This subroutine is shown in FIGS. 21(a) and 21(b), and will be explained first.
It is determined in step (111800) whether or not the switch (p+ or 5upz) is turned on, and if it is not turned on, the process proceeds to step (111805) and the down switch (Sdn
+ or 5dnt) is turned on,
Returns when it is not turned on. Up switch (Sup.

or 5upt) is ON, step (11
800), the process proceeds to step (111810), and it is determined whether or not the M mode is set. When the mode is M mode (Fbo, Fbl = 1.0), it is determined whether the second up switch (Sup, ) is turned on (u8
25). Shutter speed (Tv) when turned on
0.5Eν is added to the current shutter speed (Tv) to create a new shutter speed (Tv) value, and this is the maximum shutter speed value that can be controlled by the camera (
Tvmax) is exceeded (1185
0.11855). If this value is exceeded, the maximum shutter speed (Tv) value is set as the shutter speed (Tv) value.
vmax), otherwise return without doing anything (st860) If the second upswitch (Supz) is not turned on in step m825), that is, when the first upswitch (Sup+) is turned on, the aperture is Assuming that it is the value change mode, step (118
30), 0.5Ev is added to the aperture value (Av), and it is determined whether this exceeds the maximum controllable aperture value (Avmax) (11835). If it is, the aperture value (AV ), set the maximum aperture value (Av+max) (111840), and if it does not exceed it, do nothing and proceed to step (11845) to determine whether or not it is in P mode, and if it is in P mode, , Figure 21 (b
), the shutter speed (Tv) is decreased by 0.5Ev. P
Returns if not in mode.

If it is determined in step (111810) that it is not M mode, the process proceeds to step (11815), where it is determined whether it is P mode or A mode, and either P mode or A mode (Fbo, Fbl =0. 0 or 0,1), the process advances to step (u830) and increases the aperture value (Av). 11
850), the shutter speed (Tv) is increased.

In step (11805), the down switch (Sdn +
or 5dnz) is turned on, the display shown in Fig. 21 (b
), it is determined whether or not the mode is M mode.
+ = 1.0), the second down switch (Sdnz) is O
It is determined whether or not it is N (11880). If the second down switch (Sdng) is turned on, 0.5Ev is subtracted as the shutter speed (Tv) is decreased and the process returns (111905).

When the second down switch (Sdnt) is OFF, step (+11885) reduces the aperture value (Av) by subtracting 0.5Ev, and then in step (H890) whether the value is smaller than the open aperture value (Avo) or not. If the aperture value is small, the aperture value is set to the open aperture value (8v.) (11895).

Next, step (111900) determines whether it is in P mode or not.
) to judge. In the step (11890),
If the aperture value (Av) is not smaller than the open aperture value (AV+1), step (11895) is skipped and step (111900) is entered. This step (+119
00), if it is P mode, the above-mentioned FIG. 21(a)
) control flow for increasing the aperture value (111850 to 11
860), and if the mode is not P mode, return.

If it is not the M mode in step (111865), it is determined whether the mode is P mode or A mode in steps (11870) and (18T5), and if it is P mode or A mode, step (11188
5) Proceed to the subsequent flow for controlling the aperture value reduction, and if not, assume that it is S mode and proceed to step (11).
The process proceeds to step 905), where the shutter speed is controlled to decrease.

Returning to FIG. 12, steps (
1927), or after it is determined in step (cloud 905) that the flag indicating the card setting mode is set, the process advances to step (+1930).

This step (1930) includes a normally open switch (sc) that enables or disables the functions configured by the card.
It is determined whether or not n) is turned on, and if it is turned on, the card function in step (11935) is enabled.

Proceed to the invalid switch-on (ScDON) subroutine.

This is shown in FIG. 15 and will be explained. First, step (11
1400), it is determined whether or not the IC card (CD) is loaded in the camera based on the data (Ckb・).
If the C card is not loaded (Ckbo = 0),
Return immediately. If the mode setting card is loaded, the card function enable/disable switch (SC11) is operated, and it is determined whether a flag (CDF) indicating that this flow has been passed once is set (11
405) If it is set, it is assumed that the valid/invalid switching has already been completed during the operation and the process returns. If it is not set, proceed to the next step (
11410), sets this flag (CDF), and then in step (11415), determines the flag (CDFNF) indicating whether the card function is valid/invalid, and if it is not set, sets it to enable the card function. 111420), and if it is set, reset it to disable the card function (111425) and return.

The flow when the card function enable/disable switch (Sco) is ON in the determination at step (1930) in FIG. 12 has been explained above in accordance with FIG. 15. When the invalid switch (Sea) is OFF, step (1194
Proceed to 0).

The flow of this step (1940) will be explained with reference to FIG. 16. First, in step m450), it is determined whether or not an IC card is installed, and if the IC card is not installed (data Ckbo = O), then Return, I
When the C card is loaded (Ckbo-1), the process advances to step (11455) and whether the flag (CDF) indicating that the flow after step (11405) in Figure 15 described above has been set is set. If the flag (CDF) is set, it is reset in the next step (11460) and the process returns; if the flag (CDF) is not set, the process returns directly.

Returning to Fig. 12, the microcomputer (μC) next steps (1
945) to change the mode using an IC card or set or reset the data setting mode.
cos ) is determined to be ON or OFF, and if it is ON or OFF, the process returns through steps (1955) and (11950) related to the control of the respective subroutines. This will be illustrated and explained in FIGS. 17 and 18.

First, Figure 17 shows the subroutine when the switch (Sens) is turned on, and the microcomputer (μC)
determines whether the mode setting card is installed in step (11500), and returns immediately if the card is not installed (Ckb, ~Ckb, ≠00M). If a mode setting card is installed (C
kb, ~Ckbi=OOH), determine whether the flag (CDSF) indicating that this flow has been passed once is set (11510), and if it is not set, set it (11515), If so, skip step (11515) and return.

Next, O of the switch (Scos) shown in FIG.
To explain the FF subroutine, first step (111550) checks whether the mode setting card is installed.
It is determined that it is not attached (Ckb, ~Ckb, ≠0
0H), return. If installed (Ck
b+~Ckbh=OOw), the switch (S
c.

,) is operated and the flow of the Ml C5CDS ON) is set (11555), the flag (CDF) is set.
CDF) is not set, returns (step 1555). When the flag (CDF) is set, it means that the switch C3cns) has been turned on or off to enter or cancel the data setting mode. It is determined whether or not the flag (SETF) indicating the In step (111572), a flag (WRTF) indicating data writing to the E"PROM is set, and a switch (Sco
Assuming that the data setting mode has been canceled by the operation in step s), the flag (CDF) is reset in step (11575) to cancel the data setting mode. If it is not set, this flag (SETF) is set as a transition to data setting mode (11156
5), reset the flag (CDSF) and set (1
1575), return.

After completing the key setting control shown in FIG. 12 as described above, the microcomputer (μC) moves to step (+) in FIG.
1440) to step (11442), where it is determined whether or not a flag (SETF) indicating that the IC card is installed and the data setting mode is set is set.
If it is set, the process advances to step (11455) and executes the card data communication routine (2) to be described later. If it has not been set, the process advances to step (1445), where photometric data is input from the photometric circuit (LM) and a spot photometric value used for exposure is created. Here, creation of photometric values will be explained with reference to the photometric range shown in FIG. 11 and the flowchart for inputting and creating photometric data of the microcomputer (μC) shown in FIG. 19. In FIG. 19, the microcomputer (μC) first sends a flag (AEL) indicating the AE block.
Step (11160) determines whether or not F) is set.
0), and if the flag (AELF) is set, the photometric value is not updated and the process returns.

When the flag (AELF) is not set, the terminal (C3LM) is set to r) (J level and the photometry circuit (LM
) to output photometric data and perform serial updating (11605, 11610).

Through this communication, the brightness values (By, to BV4) of the four photometric ranges shown in FIG. 11 are input. When communication is completed, the terminal (CSLM) is set to r[, J level (11615
).

Then, in the next step (11620), it is determined whether spot metering is selected, and if it is selected (
Fb+z=1), brightness value (Bvt
) is the spot value (Bvsp) (11660). When in multi-point mode (Fb, !=Q), step (+1
1620) to (11623), it is determined whether or not a flag (AFNF) indicating that focus detection is not possible is set, and if it is not set, the process proceeds to step (11623).
1660) and select the small photometric range (LMz
) is returned as the spot value (Bvsp). When the flag (AFNF) is set, the image magnification β is calculated from β = focal length/distance based on the distance information and focal length information input from the lens (11625), and in the next step (11630), this Image magnification β
is larger than a predetermined value (K), and determines the size of the subject that occupies the photographic screen. If it is greater than or equal to the predetermined value, it is assumed that the subject is large, and in step (111640) the brightness value (B
The average of v+) + (Bvz) + (By=) is set as the spot photometry value (Bvsp), and the process returns.

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, the range is determined based on which flag (AFIF to AF3F) indicating the focus detection range is set, and the flag (8 PI
F) is set, the photometry range (LM +
) brightness value (Bv1) of the photometry range (LMz) if the flag (AP2F) is set.
z), when neither flag is set, that is, when the day focus amount of the third island (AE3) is selected, the brightness value (Bν,
) are respectively the spot photometric values (Bvsp) (1116
45-11665).

After determining the spot photometry value in this way, the microcontroller (
μC) proceeds to step (11450) in FIG. 6 and performs control regarding the AE flock, which will be explained with reference to the flowchart shown in FIG. 20. In addition, here, to cancel the AE flock, press the AE flock switch (S□L
) is pressed, the AE lock is applied for as long as it is pressed, and when the AE lock switch (SAit) is pressed again or the power self-hold is released, the AE lock is canceled (10 seconds hold mode) ) and a mode in which the AE flock state is maintained only while the AE flock switch is pressed, and these modes are selected by the IC card. In FIG. 20, the microcomputer (μC) first determines which of the two modes it is in at step (11700) [! "Determine based on FROM data (MSbs), and when in 10 second hold mode, proceed to step (111705) to determine whether or not the AE flow switch (SAEL) is turned on. If not, proceed to step (111705). , resets the flag (Aft 0NF) indicating that the AE flow switch has been operated and executed the flow after step (111705), and returns (11700).

In step (11705), if the AE flock switch (SAEL) is turned on, the flag (AE
0NF) is set or not in step (11).
1720), and if it is set, return immediately. If not set, step (Fog 1
720), it is determined whether the flag (AELF) indicating that the AE flock operation is working is set, and if the flag (AELF) is not set, A
If the flag (AELF) is set, it is assumed that the operation was performed to perform E-Flock, and the flag (AELF) is set. Proceed to step (11735) and select the AE flock switch (SAL).
L) is operated, a flag (Aft 0NF) indicating that this flow has been executed is set, and the process returns.

In step (*1700), if it is not the 10 second hold mode, in step (11740) the AE
It is determined whether or not the flock switch (S□,) is turned on, and if it is not turned on, the flag (AELF) is reset (11755). When it is ON, set the flag (AELF+) (11745), reset and start the timer (T,) for maintaining the power supply (11745).
11750), return. In this way, when the AE flock switch (SAtL) is turned on, the power is maintained. 4. In Fig. 6, when the control of this AE flock is finished, the microcomputer (μC) starts the second cycle in step (1455). data communication with the card. This data communication will be explained with reference to FIG. 5 (b). In step (1325), the microcomputer (μC) determines whether or not a card is installed, and if it is not installed (CKbo =
O) Return without data communication. If the card is installed, set the terminal (CSCD) to rl (J level (1330), output data to the IC card (CD) (1335)), indicating that the IC card is the input side, and then step (1340), it is determined whether or not the IC card installed in the camera is a mode setting card, and if the IC card is in data setting mode (C
Kb, ~CKb6=00M), step (1
900) to set the switch data sensed and memorized in 1344), and perform serial communication (134B
), outputs switch information to an IC card (CD).

After that, set the terminal (C5CD) to "L" level.
1350), return.

In the determination at step (11340), if it is not a mode setting card, that is, if it is a program card (C
Kb+~CXbi=01M), exposure calculation data and flash data that are data necessary for exposure calculation.

and lens data, perform serial communication, output these data to the IC card, and connect to the terminal (C5C
D) is set to the "L" level, data communication is completed, and the process returns (steps 346 to #350).

In addition, as data for exposure calculation, photometry direct (Bvs)
+ (Bvav) There is data indicating film sensitivity (Sv) and whether it is a positive film or negative film, lens data includes focal length data, open F value (Avo), maximum aperture aperture (Avmax), and flash data. is the data indicating whether the flash is forced to fire or auto, and the data indicating whether the flash is not installed (including power @ OFF) GN (
Guide number), data on whether charging is complete, etc.

Upon completion of the above-mentioned card data communication (n) in FIG. 6, the microcomputer (μC) proceeds to step (11460) and performs exposure calculation here.

The flow of this control is shown and explained in FIGS. 22 to 26. First, the microcomputer (μC) performs step (12
000), it is determined from the input lens data whether the lens is attached, and if it is not attached, the photometric value (Bv□)(
Instead of this, the overall averaged photometric value may be used), film sensitivity (Sv) and exposure compensation value (ΔEv) are added,
Calculate shutter speed and return (12005)
, when a lens is attached, performs exposure calculation according to each exposure mode (薯2010-12040).

Therefore, the exposure calculation for P mode is shown in Figures 23(a) to (C).
To explain it as shown in the figure, the microcomputer (μC) first
In step (112100) of FIG.
It is determined whether the difference with p) is 2Ev or more (12
100). If it is 2Ev or more, it is determined in step (12105) whether or not the electronic flash device is ready to emit light (the main capacitor is fully charged), and if it is ready to emit light, the terminal (to FLO) is set to rH, level. To (1
2110), enables flash photography, and controls exposure value (Ev
) from the photometric value (fhA) I ) of the photometric range (LM4), etc.) iv =, Bvar+ +Avo+5v-1+ΔE
Find it by v (12115). Here, 1 is subtracted to make the background look like an IE Geobar to make it look like it is backlit. In addition, I am trying to properly expose the main subject using a flash from an electronic flash device. and aperture value (Av),
The program proceeds to the subroutine (112120) of program (2) for determining the shutter speed (f) and returns. To explain this as shown in FIG. 23(b), the shutter speed control value (Tvc) is adjusted to Tv-7 (SS=1/125
), the aperture value (Av) is calculated by subtracting 7 (shutter speed) from the exposure value (Ev), and this aperture value (Ay) is 7.
(F=11), and if it is, limit the control aperture value (Avc) to 7 and return (
112215). If the aperture value (Av) is 7 or less,
It is determined whether the calculated aperture value (Av) is smaller than the open aperture value (Avo), and if it is smaller, it is set as the control aperture value (Av0), and if it is not smaller, the calculated value (Av) is set as the control aperture value (Av0).
vc) returns as (l12220-11223
0).

Returning to FIG. 23(a), step (12105) If there is an odor "i" and the electronic flash device (F) is not ready to emit light, set the terminal (FLOK) to the "L" level.
125) In order to properly expose the main subject, the control exposure value (Ev) is calculated from the spot value (Bvsp) of the photometry range, etc. as Ev = Bvsp + ^vo + Sv + ΔEv (12
130), aperture value (Av), shutter speed (
Subroutine (1213
Proceed to step 5) and return.

This is shown and explained in Fig. 23 (C). First, in step (12250), the aperture value (Av) is set to Av = 5/8E.
It is determined whether this aperture value (Av) is larger than the maximum aperture value (Avmax) of the lens (12255), and if it is larger, the control aperture value (Avc
) as the maximum aperture value (Avsax) (12260)
, proceed to step (12280). Step (1225
5), the aperture value (Av) is the maximum aperture value (Avmax
) or less, the aperture value (^ν) is the open aperture value (AvO)
If it is smaller, the control aperture value (Avc) is set as the open aperture value (Avo), and if it is not smaller, the calculated aperture value (AV) is set as the control aperture value (Avc) and the process goes to step (12280). Proceed (112265-1122
75).

In step (12280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev), and in the next step (12285) it is determined whether this is greater than the maximum shutter speed (Tvv+ax), and if it is, the control shutter speed is Limit the speed (Tvc) to (Tv+waX) (112290), and if it is not greater, set the calculated shutter speed (Tv) as the control shutter speed (I2295) and return.

Returning to FIG. 23(a), in step (12100), when the difference between By□-Bvsp is less than 2, it is determined that there is no backlight condition and the process proceeds to step (112145), where the average photometry of the photometry range (LMl) to (LMl) is performed. Value (Bv, +B
The exposure value (Ev) is determined from vg +Bv+ 1 Bv4)/4, and it is detected whether the flash device is ready to emit light (12150).

When the light emission preparation is complete, step (12155)
Proceed to Step 3 to determine whether or not you are in Flash I darkest auto mode, which automatically determines the presence or absence of flash photography, and if it is in Auto mode, set the aperture value (Av) and shutter speed (Tv) using the above program ■. (12160), and set the shutter speed (Tv) to the camera shake warning speed (Tv=6.1/
60) (12165), and if the speed is less than the camera shake warning speed, proceed to step (12170) to perform flash photography as a low speed, and if it is not in auto mode in step (12155). The process proceeds to step (12170) assuming that forced flashing is to be performed, and the aperture value (Av
) and shutter speed (Tv) and determine the terminal (FLOk)
Let rH, level 12175), and enable flash bridge formation.

However, in step (12150), if the preparation for emitting light is not completed, proceed to step (12180) for shooting with constant light, decide the aperture value (AV) and shutter speed (TV) according to program
LOk) to the "L" level (12185) and return. In step (112165), when the shutter speed (Tv) is 7 or higher (synchronized speed or higher), the process similarly advances to step (112185) and returns.

Next, the flowchart for determining the aperture value (Av) and shutter speed (Tv) in A mode is shown in the 24th section.
To explain it as shown in the figure, first it is determined whether the electronic flash device is ready to emit light, and if it is ready to emit light, the control shutter speed (Tvc) is set to 7 (1/125) and the terminal (FLOk) is rl (J level, control aperture value (A
vc) is returned as the set aperture value (Av) (12
300-12310 and +12345>. If the flash preparation is not completed, the exposure value (Ev) is calculated from the average metering value, and the shutter speed (Tv) is determined by subtracting the set aperture value from this exposure value (Ev) (12315.123
20). Then, in the next step (12325), it is determined whether the shutter speed (Tv) is larger than the controllable maximum shutter speed (Tvmax), and if it is larger, the maximum shutter speed (Tvmax) is changed to the controllable shutter speed ( If the calculated shutter speed (TV) is not large, the calculated shutter speed (TV) is set as the control shutter speed (Tvc).
), proceed to step (12340) (1
12325-112335). Step (Iwa 2340)
Then, the terminal (FLOK) is set to the LJ level, and in the next step (12345), the set aperture value (Av) is made to become the control aperture value (Avc).

Next, to explain the control in S mode as shown in FIG. 25, first, in step (112400), the exposure value (E
v) is obtained from the average photometric value, etc., and it is determined in step (12405) whether or not the light emission preparation is complete. If the light emission preparation is complete, the terminal (FLOk) is set to rH, ruher (12410).

Next, in step (12415) the shutter speed (Tv
) is 7 or less, and if it is 7 or less, the set shutter speed (Tv) is controlled.
) and 12420), if it exceeds 7, the synchronization speed is 7
is set as the control shutter speed (Tvc), and the process proceeds to step (12430).

In step (112430), the aperture value (Av) is obtained by subtracting the control shutter speed (Tvc) from the determined exposure value (Ev), and this aperture value (Av) is
12435), and if it is smaller, the control aperture value (Avc) is changed to the open aperture value (Avo
) (I2440). On the other hand, the aperture value (
Av) is not smaller than the maximum aperture value (AvC), it is determined whether it is larger than the maximum aperture value (Avmax) (112445); if it is larger, the maximum aperture value (Av
max) as the control aperture value (AvC) (12450)
, if it is not large, change the calculated aperture value (Av) to the control aperture value (
AvC) (++2455) and return.

In step (12405), if light emission preparation is not completed, the set shutter speed (v) is controlled as shutter speed (Tvc) (12460), terminal (
FLOk) is set to the "L" level (12465), and the process proceeds to step (112430) to execute the subsequent flow.

Next, when the mode is M mode (see Fig. 26), it is determined in step (112500) whether or not the preparation for emitting light is completed, and if the preparation is not completed, the terminal (LFOk) is set to "L" level, and the preparation is completed. Sometimes the terminal (FLOk) is set to “H”
level, proceed to step (112515), and change the preset aperture value (Av) to the control aperture value (AVC).
), and in the next step (12520), the shutter speed (Tv) is returned as the control shutter speed (Tvc).

Returning to Figure 6, after completing the exposure calculation (1460), the camera's microcomputer (μC) performs the third data communication with the IC card (CD) (1465), and this control is shown in Figure 5 (C). To show and explain the flowchart, first, the terminal (
CSCD) to rH level, IC card (CD)
Performs serial communication with (1360) and transfers the IC to the IC card.
Notify that the card is on the output side (1360).

Now, wait for a while (1365), perform serial communication and input data from the IC card (CD) (1370)
, When this data communication is completed, the terminal (C5CD) is set to "L".
Level and return.

In this flow, the data sent from the IC card (CD) is different when the IC card is a mode setting card and when it is a program card. , mode setting data (b+ + in cKba to C in Table 7), and display control data (CKbff) that determines whether or not to display.On the other hand, in the case of a program card, ■ shutter speed for control (C-Tvc), ■ Control aperture value (C-
Avc) *■ Data on whether or not flash light is to be emitted, ■ Whether or not flash control light emission should be set to full light (Ful1 light emission), and ■ Whether or not control should be performed by card.

When this card data communication (nl) is completed in FIG. 6, the microcomputer (μC) executes the card control flow of step (146B). This flow describes how to determine whether or not to control the camera using an IC card (in this case, a program card) based on input data, and how the camera operates when this is done. 2
To explain this as shown in Figure 7, the microcomputer (IC) first determines whether the card function is selected in step (12602).
The card function is selected (CDFNF
= 1), proceed to step (12605), while no card function is selected (CDPNP = 0)
), the function bits (pbq) and (Fb+.) are each set to 0 in step (It267?), and then (
12680), the dimming level change amount (FΔEv) is reset and the process returns. When the card function is selected, it is next determined whether or not a program card is installed, and if a program card is installed (CKb
+~CKb*=01N) In step (+2610), it is determined whether the camera is controlled by the IC card or not based on the data input from the IC card (CD). and,
Step (12605) indicates that the program card is not a program card (C).
kb+~Ckb, ≠01. ) case or step (12
610) and the camera is not controlled by the IC card (Ck
bg3=0), the process proceeds to step (112680) via step (12677).

The camera is controlled by an IC card (Ckbzi=1
), the control aperture value (Avc) + control shutter speed (Tvc) + presence/absence of Ful1 emission, presence/absence of flash emission, etc. are determined based on the data input from the IC card (Book 2615). ~12645
), then determine whether or not it is in flash mode based on the input data 12650), and when it is not in flash mode, set the terminal (FLOK) to the "L" level 12685)
, proceed to step (@2680). When in flash mode, set the terminal (FLOK) to rH, level 12
655), Detects whether it is in the Ful1 light emission mode (
$2660). Then, in the Full emission mode, the terminal (Full) is set to rH in step (112665).
, return to level, and set the terminal (Full) to "L" level when not in Full1 light emission mode.1267
0), change the dimming level value! Set (C-FΔEv) (12675) and return.

In FIG. 6, when the routine for determining and controlling the camera using the IC card as described above (1468) is completed, the process moves to display control ($470), which is shown in FIG. 28 and will be explained.

First, the microcomputer (μC) determines in step (12700) whether or not a flag (CDFNF) indicating whether or not the card function is working is set. ) ~ (cloud 272
0) is set once is determined in step (112710). Here, if the flag (CDIF) is not set, set it in step (112715) to display the functions added by the card when the card function changes from not working to working. Set the flag (DISPIF) to perform for a certain period of time (
I2720) and step (112725)
If the card function is not working (CDFNF)
= 0), steps (112710) to (1272
0) is passed once.
705) and go to step (12725), or if this flag (CDIF) is set, go from step (112710) to step (112) without doing anything.
725).

In step (I2725), the above flag (DISPI
F) is set, and if it is set, it is determined in step (12727) whether the card type is a program card, and if it is a program card, the shutter speed display section rPRo as data, , rC indicating that the card is working
Step the data showing the ARDJ display (11272B
). Note that the display in this case is as shown in FIG. 34(b).

If it is not a program card, that is, if it is a mode setting card or if the card is not loaded, step (1272
9) to select the functions of the card set in the camera.
The data is read from FROM and display data as shown in FIG. 34(a) is created. Note that the display data and display contents change depending on the set contents.

If the flag (DISPIF) is not set at step (+12725), the next step (12730)
When determining whether or not to perform display control using a card, and performing display control using an IC card (CD) (CKb, =
1) Creates display data according to the mode setting data input from the IC card (12735).

When there is no card display control signal from the IC card (Ckb,=O) in step (12730), step (I2
736) and set the write flag to E'FROM (
It is determined whether or not the ridge TF) is set. When the write flag (WRTF) is set, that is, when the data setting mode using the card ends, the process proceeds to the mode setting subroutine (12737), further creates display data (II), and proceeds to step (12745).

The above mode setting subroutine is shown in FIG. 30 and explained. Here, it is determined whether all the modes currently set in the camera are in the newly set mode or not, and if not, the mode is set. 0 For example, if exposure mode A is currently selected, but if A mode is removed from the exposure mode selection by an IC card, A mode will remain displayed as before. Since it would be wrong to perform such control, this is prevented.

Now, in the flow of Figure 30, the microcomputer (IC)
First, set the flag (CHGF) that is reset when there is a changeable mode (I3200), and check whether the settable exposure mode has been changed using the E"PRO?I data (MSbh-MSbJ and IC card (CD)). It should be determined by comparing the manually generated data (CKb, □~CKbl@) from I3203), and if they are different (i.e.,
If there is a change), force the exposure mode to P mode (set data (Fbo, Fb+) to (0,0) I3205), and proceed to step (113210).

Next, in step (13210), it is determined whether there is an H/S mode, and if there is (CKbs = 1), the above flag (C) IGF) is reset, and the changed data (CD
Change b, ~CDbc to H/S (0, 0, 0) and proceed to step (113230) (13220, 1322
5).

If there is no H/S mode (cKb*=0), data (
Fba, pbt) without H/S of (0,0) (
113215), proceed to step (13230).

In step (13230), it is determined whether or not there is a +/- mode, and if there is (CKb4 = 1), the flag (
CHGF) is set or not in step (11).
3245), and if it is set, reset the flag 113250), and step (11
3255) to change the changed data (CDb, ~CDb,) +/
- Change (001) and proceed to step (13260).

If the flag (CIIGF) is not set in step (13245), step (113250),
(113255) and directly proceed to step (13260).

In step (13230), if there is no +7- mode (CKb9-0), the functional data (
Fba, Fbs) are (0,0), and the corrected exposure amount Δ[
! Proceed to step (13260) with v=0 (132
35, 113240).

In step (13260), it is determined whether or not there is an S/C mode, and if there is (CKb l.==1), it is determined in step (13270) whether or not a flag (CIIGF) is set. , when set,
This should be reset (13275), and the changed data (CDbo
~ CDbz) as (0, 1, 0) and the next step (1
3285).

When the flag (CIIGF) is not set,
Skip steps (13275) and (113280) and proceed directly to step (13285), step (
13260) and there is no S/C mode (CKb l
o = O), step (13
265), set the function data (Fbz) to (0) and proceed to step (13285). In step (13285), it is determined whether or not there is an S/A mode, and if there is, (C
Kb, , = 1) requires step (113295)
Determine whether the flag (CHGF) is set or not, and if it is set, reset the flag (CHGF) ($3300) and proceed to the next step (*33
05), change data as S/A change (CDbO~C
Return Dbi) as (0,1°l). If the flag (CI (GF)) is not set in the previous step (13295), there is no mode that can be changed.
3310), change data (CDbO ~ CDbri (1
, 0, 0).

Also, if there is no S/A mode at step (t3285) (CKb, I = 0), step (11329
0), the function data (Fba) is set to (0) and returned to set the multi-point ranging mode (A mode).

In FIG. 28, the above-mentioned mode setting (12737) is performed, followed by data creation II (12742).

Data creation ■ is for creating display data for normal display not using a card (for example, Fig. 2 (U)), and if the card function is not working, as shown in Fig. 29 (CARD The characters will be deleted. At each step (
112728), (112779), (+12
735) and (s2742), proceed to step (12745),
In order to communicate data with the display control circuit, a terminal (C3DI
SP) to r HJ level, then step (+12
750) performs serial communication (camera output side), and after the communication is completed, the terminal (C5DISP) is set to rl level (112755).

Next, when the card function is activated, it is determined in step (112760) whether or not a flag (DISPIF) indicating a fixed time display is set, and if it is set, the CPU waits for 0.5 seconds (12765). During this time, the data created in steps (112728) and (112729) above are displayed.

Next, in step (12770), the flag (DISPIP) is set.
If the flag (DISPIF) is not set in step (12760), skip steps (12765) and (12770) and proceed to step (12775).
In step (12775), data (CKby) is set to O in order to temporarily release display control by the IC card.

Next, the control shutter speed (Tvc) is less than 6 (176
0) is determined in step (112780), and if it is less than 6, it is determined whether or not a mode for issuing a buzzer warning is selected (12785). If selected, (MSb, ~ MSb+i=ON, 211.4M
, 611+8M, AM.

C1l, Ell, ) outputs a pulse of a predetermined frequency from the terminal (OBZ) for a certain period of time in order to issue a warning using a buzzer (112790), and proceeds to step (112792).

When the control shutter series layer (Tvc) is 6 or more or the mode does not issue a buzzer warning (MSb*~MSb+
t = lH, 3) I, 5) I+ 71.911.
B)1. DH,Fll,) is not given a buzzer warning and proceeds to step (112792).

In step (12792), the camera function indicated by the input mode setting data is set to MSb, ~M of the E"PROM.
Flag (WRTF) indicating whether to write to Sb 1.
is determined, and if it is set, it is written to E'PROM (I2794). Then, the next step (12
796), reset this flag (WRTF) and return. At step (12792) the flag (WRT
If F) is not set, return immediately.

When the above-mentioned display control i (1470) in FIG. Determine whether or not it is set, and if it is set, step (
1520) and returns with all interrupts enabled. If the flag is not set, skip to step (1475) and press the release switch (I).
It is determined whether or not 2) is turned on, and if it is not turned on (Ih='HJ), the process returns. ON
When it is (IP,='LJ), it is determined whether or not one-shot AF is being used (1480). Here, in the case of one-shot AF, a flag indicating focus (AFE
F) is set or not in step (11485
), and if it is not set, step (1) is performed.
520).

When the flag (AFEF) is set, or when using one-shot AF (when using continuous AF), interrupts to this flow are prohibited in step (1490), and exposure control is performed in the next step (1495). After going (
(described later), wind the film one frame in step (1500) (this will also be described later), and press the release switch (S, ).
It is determined in step (1505) whether or not is ON, and if it is ON (IP?='LJ), it is determined in step (1510) whether or not it is continuous shooting mode, and if it is in continuous shooting mode ( Fb, = 1), step (1515)
Enable all interrupts and proceed to the SO3 routine. When not in quick shooting mode (Fb3=O), step (1150
Returning to step 5), the process waits for the release switch (SZ>) to be turned off, and when it is turned off, all interrupts are enabled in step (s520) and the process returns.

Next, the exposure control subroutine of step (11495) is shown in FIG. 31 and will be described. First step (I28
00), it is determined whether charging is completed based on the data input from the flash device (ST), and if charging is completed, the terminal (C
5ST) is set to "H" level during (t2), indicating that the exposure mode is set. Then, the film sensitivity (Sν), exposure compensation amount (ΔEv), and flash light emission amount compensation amount (FΔEv) from the IC card are calculated as the amount of light control, and these are sent to the light control circuit (STC) as analog data. Output after A conversion (112810).

In the next step (12815), the control aperture value (Avc
), and after controlling the mirror up (112B20), the control shutter speed (Tvc
) to control the shutter speed based on (12825
), and further set the Ful1 light emission signal terminal to “L” level (
I2830), return.

Here, the operation of the interface circuit when the flash is emitted is explained in the ninth section.
To explain based on figure (G)), during flash photography, the terminal (FLOK) is at the "H" level, and when the front curtain of the shutter completes travel, the X contact turns ON, and the AND circuit (AND□) emits light. The start signal is an electronic flash device (ST)
The electronic flash device (ST) inputs this and starts emitting light. When not in the Ful1 light emission mode, the rH level is output to the AND circuit via the inverter (IN□), and when a pulse signal indicating completion of dimming from the dimming circuit (STC) is input, the AND circuit (AN
Dzz) outputs this to the flash device via the OR circuit (OIh+). In an electronic flash device (ST), this is input to stop flash emission. In the Ful1 flash mode, the "L" level is input to the AND circuit (ANDzz), the AND circuit (ANIhz) becomes inactive, and prohibits the dimming signal from passing through, so the electronic flash device (ST) In this case, no signal indicating the stop of flash emission is output.

Figure 32(a) and [Yes]) include the steps in Figure 6 (
1500) is a flowchart of the control for winding one frame of the film shown in FIG. To explain this,
In Fig. 32(a), the microcomputer (μC) outputs a motor hoisting signal to the motor control circuit (MD), and the timer (
T,) is reset-started (112850.11
2855).

This timer is used to detect when the film has been wound to the final frame and is stretched. The microcomputer (μC) determines in step (12860) whether or not the switch (swn) indicating that one frame has been wound is turned on, and if it is not turned on, it determines whether two seconds have passed in this state or not in step (12865). ), and if 2 seconds have elapsed, the motor is controlled to stop (112870), and if the film is taut, control is performed to make the film taut (112875).
, return. The above-mentioned subroutine is the 32nd one.
As shown in FIG. .

2-0. L~3H18□~BM, where engineering is hexadecimal)
In this case, the motor control circuit (MD) sends the motor reversal signal.
Wait for the film detection switch (SFLM) to turn ON (112930, 12935), and when the next switch (sFLM) turns ON, determine whether or not to roll all the film into the cartridge chamber, and roll it in. In the case (EtPROM 15bq~MSb+z = 211.
311.611.1n, AM, BM.

EH, Fg), wait 1 second (12945),
After performing motor stop control 1 (112955), return.

If not involved (E”PROM) MSbw~
MSblz-On, 1)I, 4H, 5s, 88.
9111 C1l+ I)H), wait 0.2 seconds, stop the motor, and return (I2950).

When auto-return is not performed in the above step (12920) (MSbq ~ MSb + z = 4 H ~ 7 M, C
M, FH) proceeds to step (12925) and waits for the rewind switch (S@D) to be turned on, and if it is turned on, proceeds to step (112930).

Returning to FIG. 32(a), step (12860) 1-frame winding completion switch (S+no ON) is turned on.
If N, the motor is stopped in step (I2880), and then in the next step (112885) it is determined whether or not the film number counter is in the forward counting type, and if it is in the forward counting type (MSbw ~MSb,!=QH~7
H), in step (I2890), the count number (N+) of the counter indicating the number of film shots is incremented by 1, and if it is a backward calculation method (MSb, ~MSb,
To do this, the count number (N1) indicating the number of remaining film sheets is decremented by 1, and each step (s29
00). In step (12900), this number of films (N1) is set from MSb13 to MSb of E"FROM.
Write to I8.

Next, when the back cover close detection switch (SIC) or the rewind switch (S□) is operated, the terminal (INTt
), the microcomputer (μC) executes the interrupt (INT2) shown in FIG. In the flow shown in the same figure, the microcomputer (μC) first prohibits interrupts to this flow (13000), and then steps (13000) after L.
13005), it is detected whether the rewind switch (Srw) is turned on. When it is ON, the rewind operation is performed as shown in FIG. 32(b) [Rewind]
Execute the routine, enable interrupts, and return (
113010), when the rewind switch (Saw) is not turned on, the back cover close switch (S, lc) is turned on.
If the answer is N, the process proceeds to step (113015), and it is determined whether or not a film exists. If there is no film, therefore, the film detection switch (SFLM)
In the case of FF, step (
13100); on the other hand, if a film is present (i.e., 5FLH is ON), the terminal (CSD
X) to rH level and read film sensitivity fm
(DX) and film sensitivity data (
Sv) and the number of film shots (N), and when communication is completed, set the terminal (C5DX) to the "L" level (#3
020-113030). Then, set the number (N1) to -2 (113035) and the continuation ite terminal (C5DISP
) to "H" level, performs serial communication with the display control circuit (113045), outputs data that is not displayed except for data indicating the number of films (N, ), and when serial communication is finished, terminal (C3DISP) is set to "L". ” level (
13055), 1 The microcomputer (IC) outputs a signal indicating motor winding to the winding control circuit. Wait for the frame to be wound (113060)), and when the 1-frame winding switch (SWD) is turned on, the number of film sheets (Nl) will be increased by 1.
is added, and it is determined whether or not it becomes 1. If it is not 1, the process returns to step (113040). If the value is 1, the process advances to step (13075) to stop the motor, and further it is determined in step (113080) whether or not the film counter is a forward counting type, and if it is, the step (13085) is determined. ) and (Nl) is 1, and if it is not a forward calculation, the number of film scenes (N) read in step (113090) is set as (N1), and step (13
095). Then, in step (13095), the above (Nl) and film sensitivity are written to a predetermined address of E''FROM, and after the writing is completed, all interrupts are enabled (13100) and the process returns.

In the above, the microcomputer (μC) on the camera side of this embodiment
The operation of this camera has been explained using various flowcharts, and next, the control of the IC card installed in this camera will also be explained using flowcharts. Note that the mode setting card and program card will be explained separately.

The IC card (CD) has a built-in microcomputer (μCZ) with a built-in E"PROM.

First, let's start with the mode setting card.
When D) is attached to the camera, power is supplied and as mentioned above, an interrupt is applied to the camera's microcomputer (μC), a clock (φ) is sent, and the microcomputer (μCZ) on the IC card side receives an interrupt. becomes drivable.

On the IC card side, when the IC card is attached to the camera, a signal that changes from "L" to rH level is input to the terminal (R), and the microcomputer (μCz) executes the flow shown in FIG. 35(a). , the microcomputer (μCz) first resets the flag output port (ICDS) and the RAM bits (CCKbo to CCKbx) to (0, 0, 0), and then resets the E"FROM (CMSb+ to CMSb+) shown in Table 8. CM
Table 9 shows the data of RAM bit (CCXb).

~CCKbt4) and waits for an interrupt (llcD1).
5).

The contents of this E"FROM data include the camera's E"FROM data.
”FROM data (MSb, ~MSb,, gate sb,
~MSb, □) can be written.

A signal from the camera indicating a data communication request (to C3BC)
is sent, the microcomputer (μCt) of the IC card executes an interrupt (INT), which is shown and explained in FIG. 35(b).
DS0) controls serial communication with the camera, and uses the data communication clock (SCK) sent from the camera.
), input data from the camera and determine which data communication (1, II, DI) it is (
ICDS5). If data communication is I, first check what type of IC card (mode setting or program)
Set the data that indicates to the camera (in this case mode setting card), and output the data based on the clock (SCK) sent from the camera (SCD60).
, waits for an interrupt (lcD63). If data communication is ■, step (SCD70) to step (SC
Proceed to D75) and input the data sent from the camera (key data in this case) in synchronization with the clock (SC).Based on this input data, execute the data set routine (SCD75)). and waits for an interrupt (IICD63).

This data set routine is shown in FIG. 35(C) and will be explained when the card data setting switch (SCD3 is ON).
It is determined in the step (Cloud CD100) whether or not the switch is ON or OFF.
IICDIIIO, 1cD105), each control (
The control flow of 5cDs 0N) (5cos OFF) is shown in Fig. 35 (d) and (e), but this control is shown in Figs. 17 and 18 (S+, ms QNI
, (5CD3 OFF) flow and comparison step (1
1500) and step (111550) for determining the mode setting card (this is not necessary on the card side); the other steps are the same, so the explanation will be omitted.

Note that the flag has a C at the beginning to distinguish it from the camera-side flag, and its function is the same as that of the camera-side flag without the C.

Returning to FIG. 35(C), in step (SCD115), it is determined whether or not the set flag (SETF) is set, and if it is not set, (5cos O
The flag (C
Step (lc
D120).

In addition, in this embodiment, the card data setting switch (SC9,)
is set to OFF to enter the change mode, and when the flag (CSETF) is not set in step (ICD 115), it indicates that the settings have not been changed yet, but have been changed.

When the flag (CCDSF) is set, the display control flag (DISPCF) should be set.1lcD1
25) If the flag (CCDSF) is not set, reset it (ICD130) and return.

By setting and resetting this display control flag (DISPCF), it is determined whether or not the camera side display will be the display in the data setting mode [step (1127 in Fig. 28)].
30) ), in step (ICD115), flag (
When C3[1TF] is set, the switches (SS, (SFLIN), (SEXP), (SA
Flow (S, ON), (SFLINON) according to any operation of tL), (Sup), (Sdn)
, (SEIIP 0N)l (SAEL ON),
Execute (Sup ON) + (Sdn ON) and proceed to step (lcD125) (Cloud CD135~IIcD
I90).

The flow according to the operation of these switches will be explained below.

First, the change mode is selected by the change data selection switch (Ssw), and as shown in Fig. 35, the process advances to the next position according to the RAM bits (CCkb* to CCkb,) at that time. At this time, the above bit (CC
kb*~CCkbz) also changes and returns (Spirit C1
)300).

Change data enable/disable switch (SFLIN)
As shown in FIG. 35 (6), if the mode corresponding to the selection position of the change mode is set (changeable, bit = 1),
Mode reset (change heat, bit = 0), if not set, set respectively and return. In terms of signals, set (CCkbs~CCkb,) (=1
), means to reset (=0). Needless to say, in step (llcD410), the S/A mode is set.

Next, as shown in FIG. 35 (5), the selection of selectable exposure modes by the exposure mode combination selection switch (Stxr) advances by one each time this switch C5twp) is operated, and the bit ( CCkb, ~CCk
Change the state of b9).

The AE flock mode is selected by operating the AE flock switch (SAtL), as shown in FIG. 35(i).
The bit (CCkb+n) is changed so that locking or AE locking is alternated during the camera power holding period (10 second hold).

Up switch (Sur), down switch (Sdn)
) to select the mode shown in Table 2 by each operation, beep) ( as shown in Figure 35 0) and (b)
When the up switch (Sup) is operated from the current position of CCkb, ... CCkb + 3), it will count up and when the down switch (Sdn) is operated, it will count down, and accordingly the bit (CCkb
+. ~CCkb+3).

In FIG. 35(C), by step (IcDloo),
The card data setting switch (Sces) is turned on,
Step by step (ICDllo) → (ICD11)
5) When → (ICD120) → (ICD125), based on the card display control signal from the mode setting card (on the card side, this signal is output when DISPCF is 1), the camera displays the image shown in Figure 28. Step (12)
730) to (12735), the display of the functions that can be set by the card and that the camera currently has [for example, the display shown in FIG. 38(b)] is displayed during shooting [38th Change it to the figure (→〕).

When the change data selection switch (Ssw) is pressed - times,
The cursor (Δ) is at the I/S position (however, since it is not currently set, the HI3 display will be at the 38th position).
Figure (C)), when the changed data valid/invalid switch (SFIIN) is pressed - times in this state, the function of HI3 is added, and the 11/S
is displayed.

Next, a similar operation, that is, a change data selection switch (Ss
z), change data enable/disable switch (SFII
When N ) is pressed once in sequence, +
/- Since the function is deleted, the display shown in FIG. 38(e) is displayed.

Next, the exposure mode combination selection switch (SEXF) -
When pressed again, PAMS will change to PAMS as shown in Figure 38(f).
The display changes to M. AE floc switch (SAEL)
) is pressed - times, PUSHSP will be displayed in the third position.
The display changes to "Ho1d" as shown in Figure 8 (2).

Here, when the up switch (Suρ) is pressed - times,
2 changes to 1 as shown in FIG. 38 (9).

Next, when the card data setting switch (Scns) is turned on and turned off, the card display control signal is no longer output from the card, and the camera changes from (12730) to (
#2736), and at this time, the flag (Wl?TF) indicating writing to E'PRON is set [that is, the switch (SC0,) is turned from -degree ON to OFF.
(However, before turning on, data setting mode by card)
], as a result, the subsequent display (assuming all the above mode change operations have been performed) will be the third one.
The display shifts from the display in Figure 8 (mountain 8) to the display in Figure 38 (i).

Returning to FIG. 35(b), when it is determined that the data communication is (III) in step (IC (180)),
In step (#CD85), serial communication (in this case, the card side outputs) is performed, and the IC card function data (CC
Give signals of kb6 to CCkb+J and (DISPCF) to the camera side. Then, it is determined in step (llcD90) whether or not the write flag (CWilTF) to E"FROM is set, and if it is not set, the process proceeds to step (ICD63) and waits for an interrupt.
If set, function data (CCkb3 to CCk
b+ 4) of E”PROM (CMsbo~cMsb+
+) bits according to the data content (ICD92), write flag to E”FROM (
CWRTF) is reset (ICD95), the process advances to step (SENCD63), and waits for an interrupt.

In the step (ICD80), data communication (ICD80)
If it is not I), it is assumed to be a sleeve signal and HALT is sent.
state.

Next, the case of a program card will be explained.

In this embodiment, the program card is a sports program that is effective when the user wants to watch sports scenes.

Now, when the IC card is inserted into the camera, a signal that changes from "L" level to rH level is input to the RESET terminal of the microcomputer (μCZ) on the card side, and the microcomputer (μCZ) of the IC card inputs the signal as shown in Figure 36. Execute the [reset] flow shown in (a), reset the flag and boat in step (Ql), and wait for an interrupt (Q2). When the C3BCK signal is input manually from the camera, an interrupt occurs, as shown in Figure 36 etc. Execute the flow of (INT). The microcomputer (μCZ) of the IC card performs data communication based on the clock (SCK) sent from the camera (Q50)
The data at this time is data used by the camera to notify the card side of the type of communication, and the microcomputer (μCZ) of the IC card inputs this data to determine the content of the communication (Q51). , data communication! If so, serially communicate data indicating the type of card (in this case, it is a program card), the AF mode is continuous, and the metering zone is multi-point to the camera side (Q52). The process then proceeds to step (Q56) and waits for an interrupt.

This program card is designed for sports scenes, so it uses Continuous AF, which is always in focus to handle fast-moving subjects, and a multi-point metering zone, which has a wide metering range for the same reason. Since the distance measurement zone focuses on a moving subject, it is desirable to have a wide range of multiple points, but it is made switchable in case the photographer wishes to sharply focus only on the main subject.

Next, before explaining an example of a specific flowchart of exposure calculation, an overview of the control of this card will be explained.

◇Cards for outdoor sports and sports days◇ [Contents] You can take pictures of moving subjects in relatively bright places with a high-speed shutter that prevents camera shake.

〔control〕

The control details for outdoor sports and athletic meet cards are shown in the program diagram of FIG. 37. This control is performed as follows.

(a) The aperture value AV of the lens is calculated using the following formula.

When Ev<21, Av= (3/4) ・Ev-23/
When 4Ev≧21, Av= (1/2) ・Ev-1/
2, that is, when Ev < 21, the shutter speed (Tv)
Open the aperture a little to make it faster. Therefore, Av
Calculate = (3/4)・Ev -23/4.

When Eν≧21, the shutter speed (Tv) is already considered to be sufficiently high, so (Av), (Tv)
In order to change both smoothly, Av= (1/
2) - Calculate E seal l/2.

Next, compare the open aperture value Avo with the object, and the calculated value is A.
If it is smaller than vo, the aperture value cannot be set to that value, so it is corrected to Avo.

Next, the shutter speed (Tv) is determined using the following formula.

When ^V≧^vo, Tv = Ev −AvAv<Av
When o, Tv = Ev - Av.

(b) If the film is a negative film, the shutter speed (TV) is corrected to increase the shutter speed (Tv).

Negative film has a wide latitude, so use this to underexpose by about IEv and maintain a high shutter speed.

Reversal film (positive) has a narrow latitude, so no correction is applied.

(c) Others The above control is performed when a lens with a focal length of 70- or more is attached.The reason for this is that in sports photography, the distance to the subject is relatively long, so unless you use a telephoto lens, you will not be able to see the subject sufficiently. Control is not performed because it seems impossible to take pictures, and because the image magnification of the subject is small (if you do not use a telephoto lens, there is a low probability of camera shake caused by moving the lens to chase the subject).

With this control, the flash is forced off and the flash does not fire automatically.The reason is that this program card is intended for shooting in relatively bright places.
This is because the distance to the subject is considered to be relatively large, so even if the flash is activated, it does not seem to have much of an effect.

Also, in this control, if the flash switch is forced ON, the control is not performed.The reason is that this control does not fire the flash for the reason mentioned above, so if the control is performed when the flash switch is forced ON, the flash will not fire. This is because it would go against the photographer's will to use the flash.

Next, a flowchart of the exposure calculation of the program card is shown in FIG. 36(C) and will be explained. In the same figure,
The microcomputer of the program card first determines the presence or absence of a lens based on the data input in step (3). Here, if the lens is not attached to the camera body, lens data such as maximum aperture value (Avo) will not come to the tC card, so exposure calculations cannot be performed.
Proceed to step [phase] and leave exposure control to the camera body. If the lens is attached, proceed to step (2) and check the focal length of the lens from the input data. For a lens with a focal length of less than 70 m, card control is not performed for the reason mentioned above, so in this case too, jump to step @ and leave exposure control to the camera body. focal length is 70
If it is greater than or equal to w, check the state of the forced flash light switch from the data input in step (2). When the flash forced light emission switch is ON, the card does not perform control for the reason described above, and therefore jumps to step [phase].

On the other hand, if the switch is OFF, proceed to the next step ■
The exposure value (Ev) is calculated by the sum of the spot brightness (Bvs) and the film sensitivity (Sv) of the input data. Then, the content of the control is changed depending on the value of the exposure value (Ev). For the reason mentioned above, when Ev<21, Av
Step O from the formula = (3/4)・Ev -23/4
Find (Av). When Ev≧21, Av= (1
/2) ・From the equation of Ev-1/2, in step ■ (Av)
seek.

(Av) calculated in step ■ and the minimum aperture of the lens (1
A comparison with (Avsaχ) is performed in the next step (2). When Av≧Avmax, the lens cannot be narrowed down any further, so in step (2) the body control aperture value Avc is set to Avmax.

On the other hand, when Av<Ava+ax, step
Let c=Av. In this way, after determining the aperture value Avc for body control, the shunter speed (
Tv) is calculated based on the formula Tv = Ev - Avc.

In the next step ■, this shutter speed (Tv)
and the maximum shutter speed (Tvmax) of the camera. Here, when Tv≧Tvmax, step @
Go to and set the shunter speed (TvC) for body control (
Tvmax). When Tv<Tvs+ax, Tvc=Tν is set in step (2).

If Ev<21 in step (2) above, calculate (Av) using the formula shown in step 0, and then proceed to step [phase].

In step ■, (Av) calculated in step [phase] is compared with the open aperture Av0, where Av>Avo
In this case, the process goes to step (2) to compare (Av) and (Avmax). When Av≦Avo, the aperture value of the lens cannot be opened any further, so proceed to step (2) and set the aperture value for body control (Avc) to (Avo). Further, in step (2), the shutter speed (Tv) is calculated from the formula Tv = Ev - Avc.

For the reason mentioned above, if the film is a negative film, the shutter speed (Tv) must be corrected, so the type of film is determined in step [stock].

As a result, in the case of a reversal (positive) film, the process proceeds to step @ to prevent the shutter speed (TV) from becoming extremely slow.

On the other hand, in the case of negative film, proceed to step [phase],
It is determined whether the shutter speed (TV) is smaller than 9. When Tv≧9, the body control shutter speed (Tvc) is set to (Tv) in step [phase].

When Tv<9, the process proceeds to step [phase] and further determines whether the shutter speed (Tv) is 8 or more.

Here, when Tv≧8, ↑vc=9 and step [phase]), when Tv<8, step 0 and Tν=Tv
Make a +1 correction and go to the next step @. In step @, a comparison is made to limit the maximum value of (Tv) to Tv=-5 (30 seconds) in order to prevent the shutter speed (Tv) from becoming extremely slow.

Here, when Tv<5, Tvc=-5 (step @), and when Tv≧5, Tvc=Tv (step [phase]).

For the reason mentioned above, flash control is not performed, so in step [phase], a bit is set to turn off the flash. After that, the process advances to step [phase], the camera control uses the value calculated by the program card, and returns.

When these exposure calculation flows are completed, the process returns to the 36th flow and waits for an interrupt.

At this point, there is an interrupt from the camera side, and at this time, if there is data communication ■, the calculated aperture value (CAvc), shutter speed (CTvc) data, and whether or not to control the camera using the card, and whether or not to force Full 1 emission (Fb .

=0)1 Data regarding prohibition of forced light emission (Fb, .=0) and reset of flash control correction amount (CFΔEν) are created, serial communication is performed, and data is output to the camera side. Note that the microcomputer (μCZ) of the card stops during communications other than those mentioned above.

Here, the switches, their functions, various data, etc. that appear in the explanation of this embodiment are shown in Tables 1 to 10 below.

Table 1 Table 1 (continued) Table 2 Table 3 Functional data (Fb,) RAM Table 4 Mode setting data (MSbn) E2PROM Table 5 Change data (CDb, 1) (RAM) Table 6 Card communication Output data (C5b, 1) Table 7 Card type data (CKbn) RAM Table 8 Setting data (CMSbn) E2PROM Table 9 IC card, function data Table 1O Table 10 (continued) Although the entire control system for camera functions has been described, the flowchart regarding the display when the installed IC card function is working in this embodiment is shown in FIG. 28, and a specific display example is shown in FIG. 34. Shown in (a) and 弽). Note that the card function is enabled when an IC card is installed.
Thereafter, when the card function enable/disable switch (SCD) is operated, the card function is disabled or enabled as shown in FIG.

According to the light ■ΩΩ future invention, when an accessory is attached to the camera body and its function is working,
Since a display to that effect is displayed, the photographer can know this and can take pictures according to the function, which is very convenient.

If the display means is provided on the camera, there is no need to provide the display means on the accessory side.
Particularly when a large number of accessories are prepared, the camera as a whole requires a simpler configuration than when each accessory is provided with a display means.

Similarly, when power is supplied from the camera body to the accessory side, it becomes a surface element.

When an IC card is used as an accessory, it is convenient to indicate that its function is working by displaying the card, and to distinguish it from when other accessories are attached.

[Brief explanation of the drawing]

The figures are all related to embodiments of the present invention, and Fig. 1 is a circuit block diagram of the entire camera, Fig. 2 is a diagram showing the display form on the display section, and Fig. 3 is a diagram of the camera when the battery is installed. 3 is a flowchart showing a reset routine. FIG. 4 is a flowchart showing the initial set routine in FIG. FIG. 5 is a flowchart of data communication performed between the camera and the IC card attached thereto. Fig. 6 is a flowchart showing a routine for photometry, AF, display, exposure control, etc., Fig. 7 is a flowchart showing a routine for inputting lens data,
FIG. 8 is also a flowchart of flash data input. FIG. 9(a) is a circuit diagram of an electronic flash device,
Figure 9 (°C) is a circuit diagram of the interface. FIG. 1θ (a) is a flowchart of the AF routine,
10-) are flowcharts for determining the day focus amount, and FIG. 11 is a diagram showing the distance measurement range and photometry range within the photographic screen. FIG. 12 is a flowchart showing a setting routine for keys provided on the camera;
Figure 13, Figure 14 (a), 14th issue), Figure 15,
Figure 16. FIGS. 17 and 18 are flowcharts showing specific setting routines for the various keys. Figure 19 is a flowchart showing the routine for creating photometric data;
Figure 0 is a flowchart of the AE flock. Figure 21 (
a) and FIG. 21(b) are flowcharts for setting the aperture and shutter speed. FIG. 22 is a flowchart of exposure calculation, and FIG. 23(a), FIG. 23(b),
FIG. 3(C), FIG. 24, FIG. 25, and FIG. 26 are flowcharts of each mode therein. FIG. 27 is a flowchart of control by an IC card (particularly a program card). FIG. 28 is a flowchart showing the display routine, and FIG. 29 is a diagram showing a display example in one step of the flowchart. Figure 30 is a flowchart for mode setting, Figure 31 is a flowchart for exposure control, and Figure 3 is a flowchart for mode setting.
2(a) and 32(b) are flowcharts for winding one frame of film, and FIG. 33 is a flowchart showing an interrupt routine for closing the back cover. 34th
The figure shows an example of a display when a card is inserted. FIG. 35 is a flowchart showing various routines for the IC card, FIG. 36 is a flowchart especially for the program card, and FIG. 37 is a program diagram for the program card. FIG. 38 is a diagram showing a display example regarding the flowchart in FIG. 35. (μC) - - Microcomputer in the camera body. (VDD) - Power supply, (CD) - IC card. (SCD) --- Card function enable/disable switch. (DISP)--Display unit, (DISPC)--Display control circuit.

Claims (3)

[Claims] (1) In a camera configured to allow an accessory to be attached, there is a determining means for determining whether or not the function of the accessory is working, and when the determining means determines that the function of the accessory is working, the function is activated. A camera characterized by being provided with a display means for indicating that it is working. (2) The camera according to claim 1, wherein the accessory is an IC card. (3) The camera according to claim 2, wherein the display means indicates that the function is working by displaying a card.