JPS5946632A - Data reading device of camera system - Google Patents

Abstract

PURPOSE:To reduce the number of a signal terminal, by connecting a switching means provided on a body side and an accessory side to a common signal terminal and transferring data in time division through this signal terminal. CONSTITUTION:The first switching circuit which switches the data transfer between the body and a lens is constituted with switch circuits SC1 and SC2 of a circuit IF, a circuit FF3, a circuit AN4, a circuit OR3, and a circuit IN6 on the body side. The circuits SC1 and SC2 are made conductive alternately, and address data is sent to the lens side from a body-side shift register SR1 through terminals JB3 and JL3 while the circuit SC1 is made conductive, and lens data is sent to a body-side shift register SR2 through terminals JL3 and JB3 while the circuit SC2 is made conductive. The second switching circuit is constituted with switch circuits SC3 and SC4, a circuit FF7, a circuit AN30, a circuit OR5, and a circuit IN10 in the lens-side output part, and data transfer is switched on the lens side. A shift register SR3 sends address data inputted from the body side to terminals La0-La6 successively while the circuit SC3 is made conductive.

Description

[Detailed description of the invention]

Technical Field The present invention relates to interchangeable lenses such as standard lenses, wide-angle lenses, telephoto lenses, and zoom lenses, lens accessories such as bellows, and intermediate links; This invention relates to a device for reading data transferred to a main body. In such camera accessories, data specific to the camera accessory and manually set data are transferred to the camera body,
Based on these data, photographic information obtained on the camera body side can be displayed on the viewfinder or used for exposure control. The unique data includes, for example, the maximum aperture value of the interchangeable lens, the length of the intermediate link, the maximum light output of the flash device, etc., and the manually set data includes, for example, the set shooting distance of the interchangeable lens. , the setting focal length of the zoom lens. This is data such as the amount of bellows extension. In particular, the present invention is capable of storing a large amount of data of various types of camera accessories used in the camera body as described above in a fixed manner at each address of a fixed storage means such as ROM (Read Only Memory). By specifying the address of this fixed storage means on the camera body side, the specified address will be recorded. The present invention relates to a data reading device that transfers data currently displayed to a camera body so that desired data can be read on the camera body. The data corresponding to the address of the fixed storage means provided in the conventional camera accessory (1) is generated on the camera body side, and this address designation data (1) is sent to the fixed storage means of the camera accessory via the terminal. By being transferred, the desired camera accessory data that was stored at the specified address among the various camera accessory-specific data that is fixed and IG in the first row will be transferred to this fixed data. A device configured such that the image data is transferred to the camera body via the end P of the camera is proposed in Japanese Patent Laid-Open No. 48-108628. However, with this device, accessory data is sequentially transferred to the camera body from the fixed storage means of the device that does not have an address specification function from the camera body, that is, the camera accessory, and the camera body side selects the desired data from among these data. Compared to a device configured to select the address data appropriately, a dedicated terminal or extra terminal for transmitting addressing data was required (i.e., an increase in the number of signal terminals between the camera body and the camera accessory). However, as the prices of camera bodies and camera accessories rise, the probability that the reliability and durability of the signal terminals will deteriorate due to dirt or dust adhesion increases to υj (1). It has been desired to realize a device that can reduce the number of signal terminals and reduce the occurrence of the problems described above. By specifying from the camera body,
An object of the present invention is to provide a device which can further reduce the number of signal terminals compared to conventional devices in a camera system configured such that data of camera accessories fixedly stored in the fixed storage means is transferred to the camera body. It is. Summary of the Invention The present invention provides the camera/stem described in 1. Specifying means (transfer serially one hit at a time, hmerakuse → free accessory data output J"determined", 1'+12 Atreste data output hand 1 specified by the identification it "1." +J
Accessories stored in 1,117 addresses-7”
- The accessory data of the camera body is transferred one step at a time (towards this side) hint by hint, and the camera body +Ax (+111 and the camera accessory side are provided respectively). ) common 0) (,i
r5'Il;i, i rwojfshichi! I', t,
) The two switching circuits are connected to each other so that the 1-3 self-address data and accessor 1)-data are time-divisionally transferred at different timings via the common signal V:la. It was activated. (Son's margin) Example Figure 1 shows an interchangeable lens (LE) as a camera accessory.
1 is a block diagram showing the overall circuit configuration of a camera system including a camera body and camera accessories to which the present invention is applied. Note that among the signal lines shown in FIG. 1 and FIG. 4, which will be described later, the bold line portions are signal lines through which multiple bits of data are transferred. In the figure, (1) is a microcomputer or microcomputer (hereinafter referred to as μmcom) that sequentially controls the overall operation of this camera system and also performs exposure calculations. The power-on reset circuit (Pol) generates a power-on reset signal (PR+) when the power battery (BA) is installed in the camera body, and when this signal (PR+) is given to the reset terminal (RE), the μmcom (1)
will be reset. The oscillator (OSC) as a clock pulse generation means is a circuit that outputs a reference clock pulse (cp), and this clock pulse is input to the clock input terminal (CL) of μmcom (1) and each other block, and this clock pulse is input to the clock input terminal (CL) of μmcom (1) and each other block. The pulse (cp) synchronizes the circuit operation of the entire camera system shown in FIG. The display section (1) I') is composed of, for example, a time-divisionally driven liquid crystal, and is based on signals from the segment terminal (SEG) of μmC0I11 (1) and the o:comoy terminal (COT, 4). Accordingly, the exposure control value, exposure control mode, warning display, etc. are performed. μmcom (1)
, oscillator (OSC) 9 display section (1') P ) and r)
・Interface circuit (TI”), data selector (MPi), inverter (IN+) to (iN5) described later
. (lN40), 77 de circuit (ANo) is
It is powered from the power line (IE) which is directly connected to K lIh (HA). The switch (MS) is a photometry switch that is closed by movement during photometry operation, and when this switch (Ms) is closed, μm
The input terminal (11) of com (1) is connected to an inverter (IN
The signal 'l-(i g h') is input through the µmcom (1), which reads data for exposure control
The A-D conversion operation of the photometric output, exposure calculation, and display operation are started. In addition, when the r and t'l optical switches (M S ) are closed, the power supply transistor (13T+
) conducts. The aforementioned circuits and the circuits inside the camera body are supplied with power from a power supply line (4, -VI'S) via a power supply transistor (BTU). Furthermore, with the start of power supply from the power supply line (+VB), the reset signal (P
R2) is outputted, and this signal is inputted to the exposure time control device (six cameras) + accommodation control device (CA), which will be described later, to reset each device. The block (3) surrounded by a broken line is the FIII part, which includes an exposure time control device (CT) and an aperture control device (CA).
) and a pulse generator (PG). The exposure time controller (CT) has μmC0III (
The calculated or set exposure data 1"vc between 11" and 3 is input from the output terminal (OPl) of 1), and the device (CF) outputs the time (i.e. shutter shutter) corresponding to this data 1)vc. The time from opening - 1" VC to closing 2) is the clock pulse (CI)
) and control the exposure time accordingly. Data ΔAv of the number of narrowing stages calculated or set from the output terminal (OP2) of μmcam (1) and pulses from the pulse generator (PG) are input to the ribbon control device (CA). Pulse generator (pc)
outputs a number of pulses corresponding to the amount of rotation of the convergence ring (13) provided on the camera body side. Here, the protrusion of the narrowing link (13) comes into contact with the retractable pin (15) on the lens (LE) side when the lens is attached, and
Set the aperture pin (E) to the aperture value or open aperture value.
15) is biased by a spring (not shown). On the other hand, the retractable pin (15) on the lens side is biased to the maximum aperture value by a spring (not shown) on the lens side with a spring force weaker than the spring on the camera body side. With such a mechanism,
As the aperture ring (13) rotates, the aperture pin (15) rotates by an amount equal to its rotation h'', and the lens (
The aperture of L E ) is narrowed down from the open aperture value by the amount of rotation of this convergence pin (15). Therefore, the aperture control device (CA) counts the number of pulses from the pulse generator (PC) corresponding to the number of stages of the lens (LE) as the aperture link (13) rotates, and combines this count value with The data ΔAv of the number of aperture stages from the output terminal (OP2) of μmcom (1) are compared, and when the two match, the rotation of the aperture ring (13) is stopped and the aperture opening [1 is controlled ω41. The switch (LS) is a switch that detects the presence or absence of the interchangeable lens (1-E) device. It is closed when the interchangeable lens (LE) is attached to the camera body and locked, and opened when it is not attached. be done. This attachment detection switch (
LS) is closed, μmCo1n (lunar human power terminal (i
4) is connected via an inverter (IN40).
gh'' (J) signal is input, μmcom (1) reads data related to the attached lens (LE) and performs exposure calculation. Conversely, when the attachment detection switch (1-8) is opened, the input terminal (i4) is input. is 1, ow〃, the lens data is read and other calculations described later are performed.The block (5) surrounded by a broken line in Fig. 1 is the data for outputting the data for the exposed prick part j. It is an output section, and includes a photometry circuit (ME), a conversion circuit (At)), a set aperture value signal output device (AS), and a set exposure time signal output device (
1'S), a film sensitivity signal output circuit (SS), and a mode signal output device (MS). The photometry circuit (ME) is a photometry circuit that performs, for example, 'open-L' average photometry, and measures the brightness of the subject, the aperture value Avo of the lens, and the photometry error due to lens exchange (the amount of deviation of the photometry position of the photodetector from the film plane). Avc
- Outputs analog signals of A and VC. A-1)
The g conversion f4 (At') is calculated by the photometry circuit (at
The above analog signal from ME) is converted to Aunt Tintal. This A-D converted data ISv-8vo
-AVC is applied to the input A1, 1 child (IF2) of the data selector (MP+). The setting section value signal output device (AS) outputs data Avs-Avo corresponding to the setting position of the aperture setting ring (11) of the lens (1, 1) to the input terminal 1 (, 1) of the data selector (~IP1). output to IP3). The set exposure time signal output device (-i”s) is a device that outputs digital data corresponding to the exposure time manually set by the exposure time setting member (not shown) of the camera body, and this output is sent to the data selector ( MP+) input terminal (IF4).The film sensitivity signal output device (SS) is connected to the film sensitivity setting member (IF4) of the camera body.
This device outputs digital data corresponding to the manually set Saleta film sensitivity (not shown), and its output is connected to the input of the data selector (MP1) (IPs). The mode signal output device (MS) outputs an exposure control mode manually set by a mode setting member (not shown) on the camera body, or a terminal OF on the flashlight device (FL) side of the flashlight device (FL). A flash light emitting device (which is input through the side terminal (J13s)
This is a device that outputs digital data corresponding to the flash photography mode based on the charging completion r of the main condenser → NO (not shown) in I-'I-), and the way it is output is determined by the data selector (MPr). Connected to the input terminal (IF6). The interface circuit (IF) sequentially reads various data from the interchangeable lens (LE) when the output terminal (02) of μmcom (1) goes high, and reads various data from the interchangeable lens (LE). When µmcom (11 output terminal ((Jl' 3)
The data of the lenses read sequentially according to the bit data is transferred to the data selector (N) and μmC0II+.
μ(
0111(1) -\Output. 5. A concrete circuit example of this interface circuit (IF) is shown in FIG. 4, and the cutting operation will be described later. The data selector (MP+) is connected from the output terminal (OP3) of μmC0III (il) to the selection terminal (S I-).
Input terminal (IP+) according to the 4 data obtained.
〜(II゛) Output the data to p-con (1) via the data bus (D B ).The data given to the selection terminal (SL) of this data selector (Ml' l) and the data selector ( Table 1 shows the relationship between the data output from the data bus (Ml' + ) on January 1. If is '''OHn, then the set exposure time data T'vs from the input terminal (IF4) is It11 (If (IPs
) If the film sensitivity data Sv from ) is '28'', the exposure control mode data from (IF6) is %3)
If I II, the photometric value data from (I P 2 ) is '4H', then the setting stop-down stage number Av from (IF3).
The data of s-Avo are respectively output to the data bus (DB) and taken into μmcomil. Also, when the data of the output terminal ((IF3) is 5H'' to ``DH'', the input terminal (I
The data from the interface circuit (IF) input to P+) is output. Note that the interface circuit (
IF) is sent to the output ('5H''~' from (IF3)
1) Output the following data read from the lens (LE) to the terminal (11"+) according to each data of F-1'. Also, in μmcom (11), close the lens attachment switch (LS). When the input terminal f(i4) is Low", the output terminal ((IF3) outputs 'OH"~
% Only data up to 3H# is output, and the lens (L,
Data related to μmcom (II) is not included in A. (FC) is a control device that controls the flash light emitting device (FL) from the camera body side, and is a terminal (JB6) on the main body side. A light emission start signal is sent from the camera body to the flash device (Ff) via the terminal (IF2) on the device (FL) side.Furthermore, the terminal (JB7) on the main body side, the terminal (Ff) on the flash device (FL) side. A light emission stop signal is sent from the camera body to the flash light emitting device (FL) via the IF3).The light emission start signal is sent, for example, when the shutter is fully opened, and the light emission stop signal is sent, for example, to the flash light emitting device (FL). ) is emitted when the integrated value of the light that passes through 9M of the lens and is reflected between the films reaches a predetermined value. With this configuration, the flash light emitting device ( FL) outputs a light duty completion signal of 'H4gh' to the terminal (JFI) when the light duty voltage of the main capacitor (not shown) reaches a predetermined value, and the light emission start signal from the terminal (IF2) causes the cannon tube ( (not shown) starts emitting light, and connects the terminal (
A light emission stop signal from IF3) causes the xenon tube to stop light emission. Switch (R5) is a release switch that is closed when the release is operated, and (S) is an accidental exposure switch that is closed when winding is completed and opened when the exposure side is completed. '95 stop switch.The signal from the release switch (R5) is input to one input terminal of the AND circuit (ANo) via the inverter (IN3), and the signal from the accidental exposure prevention switch (CS) is input to the inverter. (lN4)
is input to the other input terminal of the AND circuit (AN o ) via the input terminal J of the p-com il).
t(i 2 ). Also, an AND circuit (A
The output terminal of Na) is connected to the interrupt terminal (eye) of μmC0m[l]. The output terminal (Ol) of μmcom (ll
gh''!1lT5 r-, the release circuit (RL) connected to this terminal or the input terminal will be connected to this
1. The release operation for the release control is performed by No. g. In addition, the output terminal (Ol) of μmcon (11) is connected to the input terminal r- of the inverter (lN2), and the output of this inverter (lN2) is connected to the base of the picture center transistor (formerly 1) through the resistor (11). This transistor (B'l'+) maintains conduction even if the photometry switch (M S ) is opened during exposure control operation. μmcom as a starting beam output means
(The output (02) of 11 is a terminal that becomes "Ilight" while the interface circuit (IF) is reading data from the lens (+, 1・') (llll+), and this terminal (02) or the inverter (INS) is connected to the input terminal of this inverter (INS).
The output of is connected via a resistor to the base of a power supply transistor (BT 2 ) as a means of supplying power to the h-mera accessory. Therefore, when the terminal (02) reaches the peak gh, the output of the inverter (INs) becomes '1..ow'.
The transistor (B'I' 2 ) becomes conductive, and the voltage from the power supply line (-1-V+y) to the source line (1-vL
), terminal on the camera body side (JBI). Connect the lens (1-1'-) via the lens side terminal (JL+).
) I+llI circuit/\power supply is performed. The data output section (7) on the lens (LE) side has a built-in ROM (ROI) (described later) as a fixed storage means in which various data of the L lens are fixedly stored. The clock pulse (CPL) output from the interface circuit (IF) on the camera body side is output from terminal 0 on the camera body side.
132) is manually input to the data output section (7) via the lens side terminal (, Jl2). Using this clock pulse (CPL) as a synchronization signal, the interface circuit (
l(αf(R
O+) address signal and data word or signal line (
SIS). Terminal on the camera body side (Jl3) Terminal on the I lens side (J
1 and 3). The block (9) surrounded by a broken line is related to the amount of movement from the reference position to the set position in a setting device (not shown) that sets variable data on the lens side, such as the distance to the subject or the focal length of a zoom lens. This is a setting data output unit that outputs data, and inside this is a distance setting device (for example, a distance ring) (not shown) from the nearest shadow position to the setting wax shadow 11 "fii'?" corresponding to the distance from the closest shadow position to the subject. ), and a distance setting device (for example, movement of a zoom ring (not shown); and a focal length information output device (FS) that outputs data of i. Then, the data from the image information output device (Its) and (FS) is manually inputted to the data output section (7) and 140M
, (ROl) is used as addressing data for R
From OM (RO+), set distance 4 data (absolute value)
The focal point "1-1 away theta (absolute value)" is output. The data reading operation of the camera system of the embodiment shown in the figure will be explained based on the flowchart of Fig. 2. In step #, the photometric switch (MS) is closed and the input terminal (ij) becomes "High". If the photometric switch (MS) is left open and the input terminal (iI) is 'Low', the process moves to step #2 and steps #3, 14, and #5. This operation will be described later.If it is determined in step #1 that the photometric switch (MS) is closed and that the input terminal (ij) is at Ili gh'', then #6 Step #7 resets the timer register (TR). This timer register ('1' R) will also be described later.Next, in step #7, the lens device switch (LS) is closed. It is determined whether the input terminal (i4) is at the peak g111t.The input terminal (i4) is 'Lo'.
w・", move to step #9, set the 1-bit discrimination register (JF) to "Ilight", and proceed to step #10.
Move to the next step. On the other hand, the input terminal (i4) is
−1−1i”, move to step #8 and p −
com (1) output terminal (02)
”, make the transistor (BTz) fully conductive through the inverter (INS), and connect the lens side circuit (71, +
9+ is started, and at the same time, the interface circuit (IF) starts reading data from the lens at ttM, and moves to step #10. The detailed operation is shown in Figure 4, which will be described later.
The circuit on the lens side is terminal (02)' +-1i gh
The lens (
It is now possible to start the operation of sending the data [, E) to the camera body side. As a result, the power supply terminal to the lens side and the terminal for transmitting the lens side data read operation start signal are shared, reducing the number of terminals to 61 functions, suppressing cost increases, and connecting the camera body and lens. It is possible to improve the reliability and durability of the connection terminal between the two. In step #lO, μmcom (moon output terminal (03
) to ' High 2 and continue <#11 Nostenov c'
“Low”. This causes the A-D converter (A D
) is given a conversion start pulse to A-1), and the photometry circuit (
ME) starts A-D conversion of the photometric output. and,
4-bit data' in a data register (DR) (not shown)
OH" is set and this data is output to the output terminal (OF2). Then, as shown in Table 1 above, the data selector (MT'+) changes the exposure time from the manual terminal (II"+). Data Tvs is output, and this data is read into a predetermined register in μmcom (1) via the data bus (January 3). Then, in step #15, '1' is added to the contents of the data register (DR), and in step #16
In step ', the contents of this data register (1,)J'
4 H", but it is not recognized at all * 4 H#
If not, return to step #13 and repeat the same operation. Therefore, until the contents of the data register (DJ) reach '4H', the data from the data selector (MP+) is
Read into mcom(1). That is, the contents of data register (1)R) are! If it is l I HII, film sensitivity data Sv is read, and if it is '2H', exposure control mode data is read. Here, #10. #
Due to the pulse output from the terminal (03) in step #11, the A-1) 9 attack has just started, and when the content of the data register (DR) reaches '3H', the process moves to step #13. In this case, the time required for eight-way conversion has elapsed, the A-D conversion has finished, and the data Bv of the subject Akira and Aoi is input to the input terminal T-(H'2) of the data selector (MP1). -Avo-AVC is input. Therefore, at '3H', this data is stored in a predetermined register. Then, when the process moves to step #16, the content of the data register (D1) is 4H, so the process moves to step #17. If the attached switch (1, S) is not closed and the value is ``1'', step #18 is performed to perform the exposure toi calculation operation described later when the lens is small. Move to the lens (1・J゛″) in step #17.
When it is determined that the register (J F ) is attached and the contents of the register (J F ) are 10, the process moves to step #2o and the data register (+,
Output r to the output terminal (OF2). As a result, the data selector (MP+) sends the data Avs-Avo of the set number of narrowing down stages to the input terminal (IF3) to the data output section (+
) Output to B). Then, in step #21, μmcom(1,) reads the data ΔvS-Avo and stores it in a predetermined register. and data register (1)
Add 1'' to the contents of R) and move on to step #23. In step #23, μ-com (1) has already been read into the lens data or interface circuit (I l ='). μ- from the interface circuit (II)
It waits for the signal applied to the input terminal T-(13) of com(1) to become ``l11g11''. That is, from the time when the output terminal (02) becomes 'Ilight' in the step #8 until the step #23, the signal line (S13) and the terminal (JB2) are connected from the interface circuit (I F ) to the signal line (S13).
), R in the data output section (7) via (JL2)
An address signal specifying the address of the OM (RO1) is output in series, and then the data output section (7) sends fixed data based on the address to the terminals (JL2) and (l
Bz) and is sent in series to the interface circuit (IF) via the signal line (SB), which is repeated. When the transfer of the fixed data from the lens to the interface circuit (IF) is completed, next is the information output device CI)S) on the lens side. The data from (FS) is assumed to be the address, and 1 (0~
The address of 1 (RO+) is specified, and the setting + f + & shadow distance information and setting focus life 1 yen information are transferred from the lens to the interface circuit (IF) of the camera body. In this way, from the lens to the interface circuit (I
When all data transfer to F) is completed, the interface circuit (IF) sets the terminal connected to the input terminal (i3) of μ-coin (l) to "lli", and reads the data from the lens. The operation is stopped. On the other hand, μ-COm(1) is connected to the input terminal r-(13) or 'l
When it is determined that the current level has become "light", the process moves to step #24, where the output terminal (02) is set to I=ow'', the picture center transistor (13T 2 ) is made non-conductive, and the power supply line (1 to // 1.) Stops the power supply to the lens. Then, reading of data from the interface circuit (IF) after step #25 is started. To summarize, data specifying the address of the ROM (ROs) of the data output section (7) is sent from the camera body to the lens, and this specified data is sent from the camera body to the lens. The fixed data stored in the specified address is sent from the lens to the main body repeatedly. When the transfer operation of these fixed data is completed, next, the setting data output section (9) on the lens side
Coated setting data output from R
It is used as address data for OM (ROl), and the data stored at the specified address is sent to the camera body. With this configuration, the terminals for sending fixed data and the terminals for sending variable data (setting data) can be shared, reducing the number of terminals. The setting data output unit (9) outputs coded data corresponding to the relative movement from the reference position, and based on this data, the ROM (ROl)
Since the absolute value data set from the code board is output, the bit discrepancy is smaller than when the absolute value data is output directly from the code board.Furthermore, the area of the code board is smaller. The data transfer operation is performed by synchronizing the transfer timing with W, such as sending address data from the camera body to the lens via the signal line (SB), and then sending data from the ROM (RU I) from the lens back to the camera body. Since the address and data are transferred in series in an alternating manner, only one terminal is required for the transfer (and the number of contacts for signal transmission between the camera body and the lens is reduced). When it is determined whether the input terminal (i3) has become Ilight', μmCOm (ll is the data taken into the interface circuit (IF) in step #25 is sequentially μm
cam(ll) is executed. This operation sequentially outputs data from 15H" to % faHII, which indicates which data is to be fetched from the output terminal (OF2), and this specified data is sent to the data selector. (MP1)
and an interface circuit (I F ). Output terminal (OF2) data or %
5 Hrr Nara check data, '6H' is photometry error data due to lens correction AVC1'7H' is maximum aperture value data 8vm, '8H' is open aperture value data A~O1'9H is shortest focal length data fw, '″
A) If I r', the longest focal length data f(, '13H'
Then, the exposure error at wide aperture (if the accuracy is at wide aperture,
Versus 1 in the center of the screen. data ΔT', vo, '(JH'' even set shooting distance Alt data, '1)) l'', data on the set focal length is output from the interface circuit (IF). At this time, the data selector (MP+) outputs the data from the input terminal module (I P 1) to the data bus (January 3) (see Table 1), so μ-com (1) Transfer the tail from tithe 1) to the data bus (
1) Repeat the operation of importing from B). Then, the interface circuit (IF
) has been completely fetched, and in step #28 it is determined whether the data register (1) R) has become a self-answer or 'I', H", then the process moves to step #29 for one line. The lens data is transferred to the μmcom (]), and each data is transferred in series to the interface circuit (i
), and each data is latched into the interface circuit (eye) as parallel data. Next, each data is sequentially read in parallel into μmC0111 (1) according to the data designation signal from μmcom (ll). While the data is being read into the interface circuit (IF), the μm ct river (1) is Other data is read in. With this configuration, compared to the case where data is inputted manually for each bit sequentially using the data serial input terminal r-,
The total operating time can be reduced. #29 Among the data imported from the lens via the interface circuit (■)), check data that is always input when the C1 lens is installed or manually. It is determined whether the This check data is the first data sent from the lens, and is the same data even for lenses with . When it is determined whether this check data has been input, μm
C(lln(1) moves to step #30 and below, and if this check data is not manually input, it moves to step #18. If this check data is not manually input, it means that the lens is not attached. and when camera accessories such as an intermediate ring or bellows are attached between the lens and the camera body. -D converted data 13v-l\v
. -Avc and (Bv -Avo -Avc) l-Avc-BV-
Δv. Perform the calculation. Then, in step #31, based on the calculated data Bv-Avo and the data Avo of the open aperture value, (BV-Avo) l-ΔVO-=ISv is calculated, and the process goes to step #32, line 19. . In step #32, perform exposure calculation according to the data of the exposure control mode sold in μm (0/1 (1)). We will discuss later on the basis of the full coach yard of μmcom (
11: Based on the calculation results described in section 2, data for displaying exposure factor value, exposure control mode 1, and warning is displayed on the display unit (DP).
and output 4'6b to step #34. On the other hand, if it is determined in step #29 that no check data has been input from the attached lens (Ll',), step #18 is performed. This #1
The calculation operation in step 8 will be described in detail below. As described above, if it is determined in step #17 that the contents of the register (J F) are I Ii and that the lens (L Ii ) is not attached, the process also proceeds to step # J8. Program mode. Automatic exposure control in either aperture-priority exposure time automatic control mode or 1 fall time-priority slope automatic control mode
The green setting for the mode is that the photographer wants the appropriate exposure to be automatically set, so if the effective aperture value at this time is ＼〜・I, the output of the photometry circuit (lvl E) is Bv-Avn. Therefore, the calculation (13v-Avn)-J-Sv=-1-v is performed, and the exposure time is controlled using this calculated value. On the other hand, a value of 0 is output as the number of narrowing down steps, and no narrowing down is performed. i.e. TrI - aperture photometry)
Exposure time or automatic collateral is used in Type 7. In the manual setting mode, the exposure time is controlled by a manually set value, the number of stops is output as 0, and no narrowing down is performed. In addition, in the power shooting mode, the exposure time is controlled by the flash synchronization limit value 1'vf, the number of flashing steps is outputted as 0, and the flash shows the exposure side " Wholesale price, exposure control mode. Outputs display data such as appeals, etc., and moves to step #34. At this time, the t+'? information of the lens aperture value is not given to the camera body, so the aperture value is displayed. is not necessary, and the aperture value is not displayed. In step #34, data Tvc for exposure time control is output from the output terminal ((JP+) to the exposure time control device (CT), and in step #35 The aperture control device (C
A). Then, at #36, the interrupt terminal (i

[
) reaches 1 peak gh", move to i'ri entry operation.
'ヱ' and returns to the start with the contents of the register CJ The reception of the interrupt signal to the input terminal (11
) is determined to be "High", the above-mentioned operations #6 to #37 are repeated, and then 611j
This operation is repeated as long as the optical switch (MS) is closed. On the other hand, when the operation of μmcom (1) returns to the start, the optical switch (MS) is opened and the terminal (iI) is opened.
If the value of the timer register (TR) is 'Low', the process moves to step #2, and a determination is made as to whether the value of the timer register (TR) is larger than a constant value (K). Move to the step and click the button ('
Add 1 to the contents of T" R), move to step #7, read the data of the deletion, display the calculation 2,
Thereafter, the operations in the order of #1-, #2-, #3-#7 are repeated. If it is determined in step #2 that the timer month register ('i' it) has become larger than the 1.1 trough or the constant value 1, the process moves to step #4 and the display section (D P ) outputs blank display data that does not display anything, stops receiving the pruning signal to the pruning terminal (l[) in step #5, and #
Go to step 1, then turn the photometry switch (MS) again.
) is repeated until the step #2-#4-#5→#] is closed. If you believe in the work of 1 Gino of μmC0Tη(1) of -9° or more, the photometering switch (ivis) will While it is closed, data reading and nod calculation 1 display are repeated, and even if the photometry switch is opened, the same operation continues for a certain period of time (from the contents of the timer register (T R) from 0 to Kll). Reading the data, repeating the operation of 6 @ calculation 9 display, and when the photometering switch (MS) is opened and a certain period of time or one cycle has passed, the above operation will not be performed. It is. When the photometering switch (MS) is closed, when the calculation operation of +-i1 is completed, step #36 becomes 1::Slip-in (receiving the interrupt signal to 10 becomes a function). Then, when the release switch (R5) is closed with the unintentional exposure prevention switch (CS) closed and the release switch (R5) is closed after the film has been loaded, the output of the T/do circuit (ANo) is output. becomes '■ight' and the interrupt terminal (1

An interrupt signal is manually input to [). At this time, the calculation of the exposure factor control data has been completed and it is now possible to receive the input signal (step 18), so the process moves to the flow for performing the exposure control operation from step #40 onwards. This transition is performed as long as - day, exposure factor control data is calculated and pruning operation is possible.
Even if the operation of ``J-)'' is performed, it will be executed immediately even if the operation of ``J-)'' is excluded because it is not included. This transition is performed by immediately jumping to a specific address as soon as μmcom [11 receives the pruning signal, and executing the command at that address. And μmC0rTl(1
) sets the terminal (02) to 'Low' as a countermeasure in case an interrupt is applied while reading data from the lens (LE) in step #40, and #41
In step , blanking data is output to erase the display on the display section (i) P ). Next, in step #42, the terminal (0+) is set to ``l-1i g 11'' to operate the release circuit (RL), and the inverter (
The power supply transistor (BT'+) is made conductive through the transistor (BT1) through the transistor (1N2), and even if the photometric switch (M S ) is subsequently opened, the conduction state of the transistor (BTl) is maintained. When the release circuit (RL) operates, the exposure control mechanism (not shown) starts operating. First, the convergence operation by the aperture ring (13) starts, and the number of pulses corresponding to 1 is output from the pulse generator (1'G) ('series) as the convergence link (3) rotates simultaneously. , its count value or output 4i 'f (OF2
) is the same as the data ΔAv of the number of refinement stages,
The aperture control device (CA) stops the rotation of the aperture link (13) and determines whether the aperture is open or not. At this time, if the camera is, for example, an eye reflex camera, a reflection mirror (not shown) is also raised at the same time. When the reflection mirror is completely raised and the aperture aperture is determined, the front curtain (not shown) starts running and the Fujide time control device (
cr) starts counting the exposure time based on the data I'vc from the output terminal (01' + ). In the flash photography mode, when the shutter is fully open, a light emission start signal is output from the control device (FC) of the flash light emitting device (Fl) from the terminal (JB6), and the flash light emitting device (Fl) is activated.
L ) or this signal is received at the terminal (lN2) to start emitting light, and when the integral value of the film surface photometry circuit (not shown) in the control device (I/C) reaches a predetermined value, the light is emitted from the end F (JB7). A light emission stop signal is output, and the flash light emitting device (FI-) receives this signal from the terminal (IN3) and stops light emission. Regardless of the flash photography mode or natural light photography mode, the exposure time count value is output to the output terminal ((Jl
When the value of the exit time data from '1) is reached, the exposure time control device (c'r) starts running the trailing curtain. When the trailing curtain completes travel, the emergency exposure 1 stop switch (CS) is released, the reflection mirror is lowered to F, and the aperture is opened.
J becomes open and the exposure operation ends. Upon completion of the exposure control operation, the accidental exposure prevention switch (CS
) is open and the output of the inverter (IN4) connected to the input terminal (12) becomes 'I・OW'', #4
In step 4, when the output terminal (01) becomes Losv' and the L/IJ-Z circuit (RL) becomes inactive, the self-holding of the Sj transistor (I3Tt) is released. Ru. In step #45, connect the interrupt terminal (10
It is determined that it is not possible to accept an interrupt signal, and the process returns to the start. At this time, if the photometry switch (+vtS) continues to be closed, the data will be read again and calculation 9
Display operation is performed, and even if the photometric switch (MS) is not closed, the i sales and calculation 2 display operations are repeated after a certain period of time. Also, it reads that the accidental exposure prevention switch (C5) is open, but the photometry switch (~Is) is closed. Operation 9 is displayed on line tS, and μ-con (1) is in a state where it can accept interrupt signals, but even if the release switch (115) is closed, the accidental exposure prevention switch ( Since C8) is open, the AND circuit (
The output of ANo) remains ``Low'' and p-com (
In 1), the x input signal is not manually input to the input terminal (i[), and there is no possibility that the exposure control operation will be performed by mistake from μ-com (1,). In addition, when the film winding is not completed after the exposure side tilt operation is completed (in case of unintentional exposure)
When the photometry switch is released (when CS) is released, reading may be performed immediately and the calculation 1 display operation may be stopped. In this case, the input terminal (11
) or '+I i gh', a step for determining whether the input terminal (12) or '+I When it is %J +jl, #
Move to step 2, and if it is determined that it is 'low', K is written to the timer register (J'R).
It is a good idea to set the data of Ll and move on to step #2. At this time, (-i-a)-, x, so 14. As soon as the operation in step #5 is performed and the photometry switch (MS) is opened, the data reading and calculation 2 display operations are stopped. FIG. 3 is a flowchart showing a specific example of step #32 of exposure calculation in flowchart 1 of FIG. Law 31 below! The I/J content of exposure calculation will be explained based on Q+. In step #50, the terminal (JFI). A charging completion signal is sent from the flash light emitting device (F L ) via the flash light emitting device (F L ) via the flash light emitting device (JB5). Determine whether or not. When it is determined that it is the flash 1 darkest mode, the process moves to step #5J and the flash synchronization limit nya soter speed (for example, i, 'v
The data U-vE of =6) is assumed to be the data T'vc for controlling the ttl output time. On the face down, ISv +Sv -'I'vf, 1 a= Av'+
(α−”(1) is calculated, and the tuning limit near speed ■＼′f becomes i+&, iE% than αl
Calculate the positive value data Avf+ where cv height is 1 small and 1 positive is 1 negative. Next, in step #53, the calculation lv4Sv-1)v8V[2 is performed. Here, Iv is L' = data for the apex value of the maximum light emission ti of the flashlight emitting device (1ゞI-),
1) v is lens (L F, ) setting shooting ijl'1i
This is data corresponding to the apex value of ilf. Therefore, the aperture value data Δvf2 obtained by 1 is the limit aperture value that can be linked when the flash light emitting device (1.1.) emits light. In step #54, these two itching output values A~4+
, Avfz are compared in size. Masu, A, v f
If I< Av f 2 then l\yf+ is a series! ! I,+r+T is 111'T, so the flow shifts to #55. In step #56, it is determined whether the found convergence value Δ~'1 is 111°1, which is within the range that can be converged and controlled by the lens (L F, ). In other words, #
Step 55 is kv f 1 q2 Av. In step #96, Av
It is determined whether f 1 <Avm. And Δv〇2Av
If f+ < Avm and within the controllable range, #
Avf+ -Av in step 57. is set as the number of narrowing stages ΔAv and #, 33 in Fig. 2 is set.
Move to the next step. On the other hand, in step #55, Avf + 4:', Av. If it is determined that this is the case, the process moves to step #58, where warning data indicating that the open aperture side is outside the interlocking range is set, and the number of convergence steps ΔAv is set to 0 in step #59, and #
Move to step 33. In addition, if it is determined in step #56 that Avf + - Avon, the process moves to step #60 to set warning data indicating that the minimum aperture side is outside the interlocking range, and then proceeds to step #61. The number of narrowing stages ΔAv is Avm −
Set to Avo and move to step #33. If it is determined in step #54 that Avf + > Avf 2 and that controlling the aperture to the aperture value Avf+ would result in insufficient light emission, the process proceeds to step #62. In this case as well, #62. #6
In step 3, the calculated aperture 1 direct Avf2 is the lens (L
F, ), it is determined whether the value is within a range that allows aperture control. That is, Avo-Av f 22-1A
If it is v, Avf 2 - Avo is set as the number of narrowing stages ΔAv, and the process moves to step #33. On the other hand, #6
When Avf2(-A-v.
> When Avm is determined, the process moves to step #60 and the above-mentioned operation is performed. In the example of operation in the second flash photography mode, the aperture value Avf
i is αE than the appropriate aperture value determined by subject brightness Bv, film sensitivity Sv, and flash sync limit gloss speed Tvf.
The reason why the value is narrowed down by v is due to the following reasons. The photometric map of the photodetector for Masusu 1 is generally not flat over the entire photographic frame, but is distributed in the center rather than the periphery, or in the center where the sensitivity is relatively high. . (Is the main subject located in the center when shooting?) 0. Furthermore, when using a flash device as an auxiliary light, the main subject has lower luminance than the sub-subject.Therefore, center-weighted if' - The output of the average light meter is attracted by the low brightness of the main subject in the center, and outputs a light with lower brightness than the surrounding sub-subjects.Therefore, if you adjust the aperture based on this brightness, the sub-subject will be This results in overexposure. Therefore, by setting the aperture αE′-゛ smaller than the edge value determined by the photometry output, the secondary subject is set to the appropriate exposure.Here, the value of αI 7- It is good to take a picture and calculate the statistical value of t, so that d can also be kept at a desirable constant value (
On the other hand, the IN light control device (F
C) controls the amount of flash light emitted by receiving the reflected light from the film of the subject light that has passed through the aperture, as described above.
This light emission control ensures that the main subject is exposed to appropriate IE exposure. In addition, if the photographing distance data 1) is large and there is a high possibility that the flash 1f will be insufficient, the flash light emitting device (F L ) is used to prevent the main subject from being underexposed due to an insufficient amount of light being emitted. Let us once again explain the operation of calculating the power output in S? based on the flowchart in Figure 3. Step #50 If it is determined that the flash photography mode is not set in step #65, it is then determined whether the exposure control mode set in step #65 is program mode.If it is program mode, step #66 is selected.・/Ptep −(lsv −I Sv),, −Av(OP
-1) is calculated in ml, and this calculated aperture value A v
It is determined in steps #67 and #68 whether or not it is within a controllable range. Then, if Avo <, Av <7~VIT+, in step #69, the number of refinement stages ΔAv is set to Av - AVO, and then in step #70, 11,
v-Av='1. ' Perform the operation of v. Then, in step #7I, ΔAv =
It is determined whether Av-Ava=Q, and when ΔAv\0, the calculated l'v is used as control data I-vc and the process moves to step #33. On the other hand, if it is determined in step #71 that ΔAv = Q, the aperture to be controlled at this time is the open aperture, so an exposure error will occur when evaluating the exposure using the screen average. . Therefore, based on the exposure error data Δl': vo, in step #72 jv - ΔI! :V(+) is calculated, and this data is used as the exposure time data Tvc for control, and the process moves to step #33. The reason for this is as follows.In other words, from the state where the aperture is closed down by one stop from the open aperture to the minimum aperture,
Is there any decrease in the incident light due to lens vignetting (rll't11 eclipse)?When the aperture is near the maximum aperture, there is a decrease in I,)Y: :i'i for people located far from the optical axis. This results in underexposure when evaluating the screen 1/1 and uniform C1 drop. Therefore, when the lens is fully open, the exposure time is set to a long second time equal to this exposure error, so that when the exposure is evaluated using a circular 1' average, the appropriate value is 1F. It should be noted that near the open aperture, it is desirable to correct the exposure error corresponding to each aperture (1i'+), but providing exposure error data corresponding to each aperture value in the lens (L E) is useful for each aperture value. It is necessary to write and set the data to [0] for each, which complicates the circuit on the lens side and takes a long time to open when transmitting data to the body. For use type 1, the maximum aperture is much higher. Therefore, the correction that is actually effective is only when the aperture is wide open, so in this example, as long as the circuit does not become complicated (only one piece of data is used). (It's a good idea to remember this) The iK output error is corrected only when the aperture reaches its maximum aperture value. In step #68, Av, := Avm. Then, it moves to step #74, step 7, performs the performance of 1-v-Avm=-1'v, and determines whether TV <1'vmax in step #75. Then, Tv < Tvmax, the exposure time calculated in step #76 is used as the control sensor 'I'vc, Avm-AvO is narrowed down, the step number ΔAv is set, and the stethoscope in #33 is repeated.Also, #75 In step , when Tv > Tvmax, set warning data indicating that the shortest exposure time is outside the interlocking range, use Tvmax as control data, and then set Av
m-Avo is narrowed down and the number of stages ΔAV is set, and the process moves to step #3:3. In step #67, Av < Av. If it is determined that the number of refinement stages is 0 in step #81, then
= Tv is calculated 7, and since the control aperture is open aperture #83
In step #84, the calculation 1'v-Δ■rei■0 is performed, and this data is used as exposure control Illll geta c. In this step, it is determined whether Ty(;2.Tvmin) and Tvc 2 T
If vmin, proceed directly to step #33. - If rvc < Tvmin, in step #85 set notice data indicating that the longest exposure time is outside the interlocking range, set Tv+nin as collateral data 'T'vc, and move on to step #33. If it is determined in step #65 that the exposure secondary mode is not program mode, then in step #87 it is determined whether it is exposure time priority mode (S mode).Then, it is determined whether exposure control mode or S mode is selected. When it is determined that this is the case, the aperture implantation ■ is calculated by calculating Bv -4-Sv -Tvs = Av in step #88.Then, the process moves to step #67 and performs the above-mentioned operation. 87, it is determined whether the mode is exposure control mode or not S mode. Next, in step #89, it is determined whether the mode is aperture priority mode (A mode). Then, when the exposure control mode is A mode, the next step is , it is determined whether or not the manual aperture setting data AV-A■0 in step #90 is Av - Avo = Q. Then, Av
When -AVO=Q, it means that the aperture is set to the maximum aperture, and the process moves to step number #91. In step #91, the calculation 13v I-Sv -8vo, = 1-s is performed, and then Tv -ΔEv. Perform the calculation to control this data (Pi'?1-' in step #93 as ill data i'vc)
=. In step #93, it is determined whether Tvc /Tv+nin. And 1'
When vc -1Tvmin, set the number of aperture steps ΔAv to 0 and set the shoulder data that darkens the area outside the interlocking range on the I & long exposure time side using the #94 steering knob, and set the exposure time control data Tvc to Tv.
Move to #33 Ste Knob as min. on the other hand,#
[In step 93] When vc > Tvmin, next, use the step knob #97 to set rvc > Tvmin.
It is determined whether 'l'vmax is reached. And Tvc
)'l'vmax, in step #98, Ev-Tvrnax =, Av is calculated, and it is determined with the steering knob in #99 whether Av/Avmax. If it is determined that Av < Avmax in this judgment, #100's Ste/knob is used to set 1-vmax as data for suppression], and #101's Ste/knob is used to narrow down Av-Avo as stage number data. #
Perform 13 lines in step 33. On the other hand, if it is determined in step #99 that AV':〉AVilla , −, I'vmax is the control data,
The process moves to step #33 with ΔVmaX-/~vo as the number of stages of narrowing down. On the other hand, -1 in #97 Stesogame,
When it is determined that 'vc S Tvmax, the number of narrowing stages Δ~V is set to 0.
As a result, the process moves to step #33. If it is determined in step #90 that Avs --Avo\0, then the process moves to step #106, and the calculation Bv + Sv - Avs = 'l-v is performed. Hereinafter, as in 11, -I'vmin knee 1'
v −,, Tvmax, the calculated ]”■ is the exposure time control data ゛rvc, A, vs −Avo
Let be the number of stages of narrowing down. When -1'v <-'rvmin, next calculate Ev -1-vmin, Av, and calculate whether this calculated Av or A, vo<~
Av, the number of aperture steps ΔAv is set to AX·-Avo, and the exposure time control data l'vc is set to l'vmin. −
When Avo:l:>Av, a warning is issued by setting the number of convergence stages ΔAv to O and setting the exposure time planning data Tvc to -fvmin. Also,
When 'l'v)'rvmax, then the calculation Ev-Tvmax=Av is performed to determine whether Δv-)AVll+. And Av
--, Avrr. When , Av-8vO is contained, the data of the number of stages, I'
Let vna x be control exposure time data 'I'vc. On the other hand, when Av>ΔVnl, the control h1 exposure time data Tvc is set to I'vma
x, the number of refinement stages ΔAv is set to Av+u−Avo, and a warning is issued at 11. . In step #89, select exposure control mode or aperture priority mode (
If it is determined that the mode is not A mode 1.), it means that the manual setting mode (1 mode) or the exposure control mode is set, and the process moves to step #124. At step #124, Bv l−Sv =
-Ev is calculated, and then in step #125 Avs
-8~IO-+O It is determined whether or not. And Avs.
-Avo-0, then in step #126 Ev-8vo -('r'vs -Δ1・,~'0)
Skip the calculation of ΔEv by 1j'', and control the discharge time data J'vs with the step number of #127 (discharge data, set the number of stages to O and move to step #33 f-1
do. On the other hand, if it is determined in step #125 that Av5--)\VO\O, step #129 (calculates Ev - Avs - U - vs - ΔEv and controls the set exposure time data "1" S.S. The data for arsenal I'vc, the number of slope steps ΔA~゛ is the set value Δv5-A
As VO, move to step #33. son, 1
, This is the movement of the seven threads that fall out. Figure 4 shows the interface circuit (I F) of No. 11).
5 is a specific example of the data output unit (7) on the lens side in FIG. , and FIG. 7 are diagrams showing time charts at the end of the reading operation. S-down! The circuit configurations shown in FIG. 84 and FIG. 5 will be explained. First, Tables 2 and 3 show the allocation of addresses in the ROM (RO+) in which the lens valley data shown in FIG. (Margin below) Table 2 Table 3 Based on Tables 2 and 3, data fixedly stored in the ROM (ROl) will be explained. In addition, as an example of a specific lens, a zoom lens with a focal length of Omm-135 and an aperture value of F3.5 to F22 is shown. ROM (RO+) address” 00000 D 0
1" is the check data '11100' or J4.1 to detect whether the lens is attached. I'm being turned away. Toward,
This shell, in this example, is limited to a lens with a hole in it.No matter what type of lens it is, this address "'0000000"
1" has this text: '11100' or '1. Q has been asked. In addition, Choi and Yuzuki 1 data is °“14100”
” Any data can be used for all species, not limited to 4
Any data that is common to the c[+ lenses is fine. The address "00000010" contains the above-mentioned 13FI aperture value and the nuclear error ΔIi v o data when taking the closest shadow.1. <V, but in this example ΔE V O
-2,78 note table; data shown in 3 “'oooto”
is memorized. The address “0000001” has the maximum width value l.
I remember the old Eta, and this example is I'22 (
l\\・9), so F 22 (Av −=
9) data "11010"' is written in. The address "000tlO100" has the open aperture value A.
, 1'-evening of vo is stored. In this example, AV
Since O=; 3,62, l' in Table 3 is 3.5 (, 8V
=3.62) (7) Data “01010” is 11
I'm going to have a good time. .・The joy address "'000001 old °' has the zoom lens's maximum focal length) 41r de = -ri fW or 1.4,
In this example, 010 is applied to the 50 mm shown in Table 3.
11" eta or d is memorized.NaS, 7.j',
,,+,'4,lI! In the case of a fixed point part mlF lens that is not modified, data on the focal length of the lens is stored at this address. ”000
At the address "00110", the longest focal length of the zoom lens, eta f[, is stored, and in this example, eta of "1ooo+'", which corresponds to 135 mTl shown in Table 5, is stored. In the case of a fixed focal length lens, it is not indicated that it is a fixed focal length lens, but the tag ``11] 1]'' or 1τ, Q5: is used. Address 00001000”, “’00001
UOI'', ``000 old (month 0'') stores YI error data A to 'C due to the above-mentioned lens exchange. The reason why the WMR i-ta is provided in this way is that even if the same interchangeable lens is attached to different types of camera bodies, the relative position of the light receiving element of the camera body and the lens exit 11 will be different. This is because there is a need to convert the photometry error data without correction.In other words, it is necessary to record only one data corresponding to one type of camera body in the ROM (RO+). Therefore, if you attach this interchangeable lens to another type of camera body and perform a through-image, you will get an incorrect exposure.Therefore, in this example, three addresses are attached to the three types of camera bodies. The data of the photometry error is stored respectively, and when this interchangeable lens is attached to the first type of camera body, the address of 00001000° is specified, and when the second type of camera body is used, the address is specified. is °“0O
OOIIJOI'' address is specified, and in the case of the third type of camera body, the address ``'00001010'' is specified.The camera body shown in Figure 4 is , is set as the second type.7.And in the example of Table 2, the address 'ooo
The data for the +* order of the condolence stored in oiooo". is 01010"
(Avc = +2/'s), address "0000"
The data for the second type stored at 1001° is '001 old', and the data for the third type f stored at address '00001010' is '01001' (
8vc ・11. y'8) and -5 o j'r
An example of the photometric error stored in the lens is shown to Person 4.
Using the lens of 1.4 as a reference lens, we calculated the 1111 light error X when this lens was attached to the camera body of each classification, and calculated the cuff error of each lens and each type of TTR. There is incorrect data A and C corresponding to the above. This is the constant data for the following Cheetaka lens. Atrea, (7) “00010000” ~”00
011111" (7) 4j (In the box, shooting distance data is stored as iJ basic data. Shooting distance information blade device (DS) is II'11 distance link (not shown)) 4-bit data corresponding to the movement September from the nearest neighbor 1 is output, and this data specifies the 1' 4-bit address of r3 to ru in the address data and is written in the corresponding address. The data of the neglected shooting distance (absolute value) is output.In this example, when the data of "(1010") is output from the flock (+) S), the address "'0OO100H)" is specified and the data is stored there. The stored data "O], 1.0" of '2 m (IJv・2) is outputted from f (RO+) force) to RO, and the block (Its) passes "1011'' C)
CHI Taka output FL and address °' 0001
1011” is specified and 9.5 m (lJv=6
．． 5) Data “10101” is ROM (RU 1)
is output from. In addition, since the shooting distance data is used for calculations for flash photography, it is in the same apex series as the range value, and I) ＼△ when changing in v or O05 units.
■Increase the number of data hits for addresses from block (1) S) to output data corresponding to the value of m. By increasing the number of data hints, it is also possible to increase the data range in small units. Address '00100000''~''0010111
1" stores the focal length data set by the zoom ring in the case of a zoom lens; for example, a fixed focal length lens table stores data such as "'11111°'' indicating that it is a fixed focal length lens. It is stored in all addresses of the terminal. Similarly to the shooting distance, the focal length information output device (t;'s) outputs 4-bit data corresponding to the movement of the zoom link (not shown) of the zoom lens from the position of the shortest focal length. The lower four addresses of r3 to rO of the address data are designated by the data, and the focal length (absolute value) data stored there is output. In this example, the data from block (tos) is ' o o i o
``Then, the address ``00100010'' is specified.
10
10" or the output is the address "'00101010
” is specified and the data of 1105ff1 is “1oooo
” data is output from 1 (OM (RU s ). Note that the focal length data here is 50 mm, 85
Although only commonly used data such as Rm and 1.00 mm, that is, the focal length of a fixed focal length lens, can be obtained, address data and focal length: lil
It is also possible to obtain more detailed focal length data by increasing the number of data bits. Next, in the interface circuit of FIG.
When the switches (LS) and (MS) are closed as described above, μmcom (ll
A reading start signal of 'fIigh' is output from the terminal (02) (Fig. 6, 02). At this point, one shot circuit (O51) outputs a single pulse of 'gh'. (O8+ in Figure 6), the falling of this pulse triggers the flip clock (FF+).
It will be 71. This flip-flop (Fl.
I) is the pulse (7J) of the power-on reset circuit (PO2) (Fig. 1) output from the OR circuit (OR+).
1'R2) or an AND circuit (Af'1ie), which will be described later, indicating the end of data reading of the interface circuit (iF).
) is reset at the falling edge of the pulse (e+]d2). The 9 outputs of the flip-flop (FF+) are connected to one input terminal of the AND circuit (AN+) and the 1) input terminal of the D flip-flop (1)F'l), and the other input of the AND circuit (AN+) The terminal is connected to the oscillator (O
8C) is connected to the clock pulse output terminal T- (CP), and the output terminal (CP r-) of the AND circuit (ΔN+)
is the clock terminal (
C1, ) and the terminal (JB2) as the clock pulse output terminal I
L) is supplied. Therefore, the D flip-flop (DF+) takes in 1J power at the falling edge of the next clock pulse (CPL) after the flip-flop (FF+) is set, and makes the output 1High ($ 6 Figure 1) Fl).The output of this D flip-flop (1) Fl) is the counter (COl), (ω
2) Reset terminal of (CO3), decoder (DF
2) It is connected to the enable terminal of (DF3), and the output becomes '+-tight'.The counter (COl), (CO2), (003) (7)
The IJ set state is released and the decoder (1
)E2) and (DF3) are in a state where they can be output, and data can be exchanged 7 between this interface circuit (IF) and the lens side. In addition, the OR circuit (OR
The output terminal of 1) is a flip-flop (FFa),
I) Resetting the flip-flop (DF+)! The flip-flop (FF3) is reset at the rising edge of the pulse from the OR circuit (OR+), and the D flip-flop (DF1) is reset at the falling edge of the pulse from the OR circuit (OR+). On the other hand, in FIG. 5, the μ-co of FIG.
m (terminal (02) of 11 or 'High' terminal, transistor (BT 2) as supply 1i means
conducts and the power supply terminal (JBI) and power input terminal 0l-
1), power supply from the camera body side to the lens side is started. This allows the power-on reset circuit (PO3
) operates, and the flip-flop (1'F
7) The flip-flop (1) Fs) is reset when this pulse rises, and the flip-flops (FFs) connected to the set terminal rise and are set. . These power-on reset circuits (PO3). The flip-flops (FFs) and the flip-flops (DFs) are provided as setting means for setting the first stage of the timing controller mentioned above to the operation start state in response to the start of power supply described in "1". On the other hand, as mentioned above, the synchronization of the operation timing between the camera body and the lens (clock pulse (CI'L) as the number M) is transmitted from the AND circuit (AN 1) in FIG. 4 to the clock pulse output terminal 0132.
), is manually input to the camera accessory via the clock pulse input terminal T-(JI・2). At the falling edge of this clock pulse (CP L ), the output ('High'') of the flip-flop (FF'5) is taken into the flip-flop (DFs) and is output to the D flip-flop (1) F6. ) becomes t4 i gh''. This q output terminal is the counter (Q)4), ((
X) 5) Glue set terminal and decoder (1) F: 4)
The counter (Q) is connected to the enable terminal of the counter (Q) a.
), (COs) are released from the reset state, and the two coater (1) E 4 ) becomes ready for output. Here, the one-shot circuit (O5+) outputs '
If the pulse 1 of ``lli gh'' is made longer than the pulse l+ of ``lli gh'' output from the power-on reset circuit (PO3), the pulse 1 of ``lli gh'' in FIG. The flip-flop (FF+) in FIG. 4 is set to 1-, and the AND circuit (A
Since the clock pulse (CPL) is output from the AND circuit (AN + ), the first clock pulse (CPL) from the AND circuit (AN l) falls and at the same time the flip-flop (+) Fl), ( 9 of IJFs)
When the output goes off, the circuits on the Pnomera main body side and the lens side are released from the reset state at the same time. The counter (GO+) and decoder (IJE2) in Figure 4
, this 3-bit counter (Q)2)
Outputs (C53) to (C5o) and counter (Co 1)
The output (C84) is input to the decoder (DF, 3), and the decoder (f) E3) receives the output of 9. according to the output of the counter (CO2) and the output (C84) of the counter (Go1).
Set one of the 16 children (So) to (516) to 'High'.The 'High' output from this decoder (DF3)
The "signal" is a step signal that determines the step of outputting the lens side head address data from this interface circuit (IF) and the step of reading the data of the lens. The step (So) and the step where the terminal (S+) is "Ilight" are called the step (S+). Each of these steps is shown in I) E 3 of FIGS. 6 and 7. (The following is a blank space.) In Figure 4, the terminal (']"136) of the decoder (DF2) is connected to one side of the AND circuit (Hough),
The counter (COQ terminal (CI33)) or the inverter (INo) is connected to the bending power.The output of the AND circuit (AN7) is connected to the counter (CO3).
is connected to the clock input @F(CI,) of This counter (CO3) is the ILOM (shaku 01) on the lens side (
This is a 3-hit counter used to specify the address data in Figure 5), and the outputs of these 3 hits are sent via the data selector (to 4Po) to the /ft register (
SRx) input terminals (Ba3), (Ba2),
(i5a+). This counter (CO3
) is the output terminal (C84) of the counter (COI) or 1, O
W", the output terminal (TI3) of the decoder (1 72)
The counter that counts the pulses output from S) is '004' at the timing of (1'136) of the (So) step, and '004' at the timing of (1't%6) of the (S2) step knob. 0", (S4) step ("I'1
．． ``O11'' at the timing of S6), ``100'' at the timing of ('l'136) of the (So) step, (S
8) At the timing of ('l'Ba) of step '1
01'', becomes '110'' at the timing of (1''B6) of the (S+o) step. The 3-bit output of the counter (CO3) is further input to the AND circuit (AN20), and the lowest hint or human input The input terminal is an inverted input.Then,
The output of this AND circuit (AN20) is connected to the 19 inputs of the D flip-flop (DF2), and the clock terminal (CL) of the D flip-flop (+) F 2 ) is connected to the terminal (T13o) of the decoder (DE2). is connected. Therefore, ('1786) of (S 1o ) steps
The output of the counter (CO3) is "110" at the timing of
” and the output of the AND circuit (/V'J 211) becomes 'High', so at the timing of (TI3 o) of the (S++) step, the 9 output of the 1) flip 70 tube (DF2) becomes ' 1) The q output of the flip-flop (DF2) goes to the data selector (
The delta selector (MPo) is connected to the selection terminal (S t, ) of the selection terminal (SL
When the human power input to ) is 'LoW', the input data from (βl) is output, and when it is 'High', the input data from (CO) is output. Data selector (M
The (β1) input of Po) has the upper 4 bits and the lowest bit connected to ground, and the remaining 3 bits are connected to the counter (ω3).
output is connected. On the other hand, the human power of (R0) is
Fixed data “00010010” is input. Therefore, from this data selector (MPo), (S+o
) Up to step (β1), data corresponding to the output of the counter (CO3) is output, and after step (Slt), data Avc of the photometry error for the second type of camera body from (R0) is stored. The data at the specified address will be output. The shift register (SRz) in FIG. 4 is an 8-bit input shift register, and is connected to the output of the data selector (MPo). This shift register (SR1) is connected to the input terminals (Bay) to (Bao) in parallel with the rise of the clock pulse (cp) to the clock terminal (CL) when the input to the switching terminal (SP) is High. When the input to the switching terminal (sp) is 'Low', the captured data is serially output from the upper bit to the output terminal (OUT) at the rising edge of the clock pulse to the clock terminal. The -10,000 input terminals of AN2) and (AN3) are commonly connected to the clock pulse (CA)) terminal, and the north input terminal of the AND circuit (AN2) is connected to the decoder (+)R2). The output terminal ('l-136) of the AND circuit (AN3) is connected to the input terminal of the AND circuit (AN3).
) I':2 ) Output 9. The h1 child (-117) is connected. The output of the AND circuit (AN 2 ) is connected to the center terminal of the flip-flop (1'F2), and the output of the AND circuit (AN 3 ) is connected to the reset terminal of the flip-flop (FF 2 ). , the 9 outputs of this flip-flop (FF 2 ) are shift/
It is connected to the switching terminal (S l) of the register (Slit). Therefore, the flip-flop (r'F2
) is set at the rising edge of the clock pulse (CI)) output at the timing of (TIS 6 ), and (TB
Clock pulse (C) output at the timing of 7)
l)) falls and is reset (Fig. 6, Fig. 7 1°I' 2χ).
R+) is the output box a f ('
I'B 7) started by manually inputting data in parallel,
Data is output in series at the timing of (1゛1effect) to ('I'lS 6 ). These counters (C03). l) Flip-flop (1) F 2 ), data selector (MPo), flip-flop (F'F2)
, /ft register (SR+), AND circuit (AN2
), (AN3), (AN7). (AN20) and the inverter (INo) form address data output means for outputting address data of the camera accessory. 544 The flip-flop (1?',,) in Figure 544
The output (end) of the AND circuit (AN+6) is connected to the
+) is connected. One input terminal of this AND circuit (AN1) is connected to the output terminal (1'B6) of the decoder (1) E2, and the other input terminal is connected to the decoder (1) I'1.3. ) is connected to the output terminal (514). Therefore, the timing of (514) steps (1
'B6) outputs the //loss of (end+). As will be described later, this timing is the timing when reading the fixed data of the lens is completed, and after that there is no need to output address data from the interface circuit (IF) of the camera body. Therefore, this (endx) pulse causes the flip-flop (FF3) to turn the q output to 'L, ow', and this output is connected to one input terminal of the AND circuit (AI'J4). ) to 'Low' and switch circuit (SC; +)
becomes non-conductive. The other input terminal of this AND circuit (AN4) is connected to the terminal (CIS3) of the counter (C01), and is reset by a pulse from the flip-flop (FF-3,) or OR4 (OR+). Then, the pulse (end+) from the above AND circuit (AN +6)
The switch circuit (SG+) is conductive for the period of the terminal ((:83) or g11'' until the address data is set from the shift register (SR+) or from the terminal (JB3) to (JI, 3). ) to the lens side circuit. One input terminal of the OR circuit (OR3) is connected to an inverter (
The counter (CO1) terminal (CH2
) is connected, and the above-mentioned flip-flop (FF3) output is connected to the ul+ input terminal. The output of the OR IQ1 path (OR3) is connected to the side terminal of the switch circuit (SC2) and one input terminal of the AND circuit (AN s ). The output terminal (1'B s ) of the decoder (+) E 2 ) is connected to the hydraulic input terminal of the AND circuit (ANs), and the AND [four-way (AN
The output terminal of the latch circuit (LA) is the launch terminal (
L). The switch circuit (SC2) is connected to end P.
(JB3) and the input terminal (IN) of a shift register (SR2) serving as accessory pig reading means. This shift register (SR2) receives a clock pulse (cp) manually inputted to the clock terminal F (CL).
The signal applied to the input terminal (I N ) is sequentially transferred to the terminals (Bbo) to (Bb4) in synchronization with the rising edge of the signal. Note that the output of the OR circuit (OR3) is the flip-flop (FF3) and the set state j1- (that is, from the start of reading data from the lens until the reading of fixed data among them is completed). Eyes, one counter (
During the period when the output terminal ((+33) of CO+) is 'Low', it becomes 'High' and the switch circuit (SC2) is made conductive to take in the lens data to the shift register (SR2). That is, the switch circuit (SC+) and (
The signal lines (SC2) are alternately conductive and never conductive at the same time.By doing this, the signal lines (S1
3) While the switch circuit (SC+) is conductive, the address data is transferred from the camera body side shift register (Sl(+) to the lens side circuit) via the terminal (+133) l (JL3). , while the switch circuit (SC2) is conducting, the lens data terminal (JL3), (
The signal is sent from the lens side to the shift register (SR2) on the camera body side via JI33). This shift register (
The output end of SR2) (to I1)4) to (+31)O) is connected to the latch circuit (1, Δ), 1M, and the latch circuit (LA) is an OR circuit (OR3). The timing (l13s) when the output is '+Ihigh' rises and latches the output of the shift register (SR2).These switch circuits (SC+), (SC2), flip-flop (FF'3) , ant circuit (AN4), an OR circuit (0 艮 3), and an inverter (IN), which switches the data transfer between the camera body and the lens on the camera body side.Latch circuit The output of (LA) is the register (R1': Go
) ~ (RE to s) is connected to the person Jqj''W of these registers (REGo) ~ (R1 and C8).
The outputs of AN 1g ) are connected to each other. One input terminal of these AND circuits (AN + o) to (AN + s) is commonly connected to the output terminal (
TBG) is connected, and the AND circuit (AN to) ~ (A
Decoder (1)E is connected to the other input terminal of JN+s).
3) output 4: children (S2), (S4), (56
), (S8), (510), (SI2), (S
l4), (S15). (816) are connected to each other. In addition, the output of the AND circuit (AN +s) becomes the terminal (end 2) indicating that all data reading of the lens has been completed, and this terminal (end 2) is connected to the flip-flop (FF4). ) is connected to the set terminal. The q output of this flip-flop (FF4) is μm (O
It is the input terminal (I3) of nl(1). The output terminal of an OR circuit (OR2) is connected to the reset terminal of this flip-flop (FF4), and one input terminal of this OR circuit is connected to the output terminal of the power-on reset circuit (PO2) shown in FIG. (The input terminal of the 101st side is connected to the output terminal (a8) of the decoder (DF, +), which will be described later. Therefore, this flip
The flop (FF4) is closed by the photometry switch (MS) and output terminal of the power-on reset circuit (PO2).
It is reset when a pulse is output from j-(PI<2), and is set by a pulse output from the output terminal (end2) of the AND circuit (AN+8) after all data has been read from the lens. Ru. and a decoder (
The f11□1 child (R8) of DE+) is, as described later,
From interface circuit (IF) to μ-com (1)
The flip-flop (1'F4) is reset at the end of outputting data from the interface circuit (IF') to μmcom(l) because the terminal becomes h" at the end of data loading into the lli. μmcom (moon output terminal ((JP3)) is input to the decoder (+',)E l), and this output terminal ((
output terminals (ao) to (R
Any one of 8) will be 1igbJ per month. Table 6 shows the relationship between human power and output of this Tekota page 1-JE 1).
'8) is a register (LEG o) ~ (REG 8)
are connected to the respective chip select terminals (CS) of the chip select terminals (CS).
“The registers that are set as
), and this data is taken in to μ-com (11). In FIG. 5, one input terminal of the AND circuit (#J 30 ) is connected to the output terminal (CI-3
) is connected, the other input terminal is connected to the q output (F I) ) of the flip-flop (FF7), and the output of this AND circuit (AN 30 ) is connected to the switch circuit (
SC3) is connected to the control terminal. This switch circuit (SC3) is connected between the terminal 0l-3) and the input terminal of the shift register (Slζ3). Furthermore, the clock input terminal of the soft register (SIT3) (
CL) receives the clock pulse ('C) from the terminal (JL2).
)'L) is input, and this shift register (SR
3), while the switch circuit (SC3) is conductive, the address data input from the camera body side via the terminals (JB3) and (JL3) is sent to the clock pulse (CPL).
) terminals (Lao) to (La
6). The AND circuit (AN 3s) has a soft register (SR
3) terminal (La3) and the decoder (DE4) terminal (T
L7) is manually operated, and when the terminal (1,, a 3) becomes "Hi g b" at the timing of (T'L7), the output of the AND circuit (AN35) or 'Hi g
h".The timing of 11" in this "lli" is '00001', which is the final address data for fixed data from the camera body, that is, photometry error data Avc.
000" or '00001001"' or °'0000
1010" at the time the address data is sent.■
”Win. The output of the AND circuit (AN35) is a flip-flop (
It is connected to the set terminal of 1st tri. Therefore, this flip-flop (FF7) has a timing (1'L7
)in! li! 1! Child (La3) (7,) Output or High
When it is determined that the address is 11" (in other words, it is the final address for fixed data), the 9 output (1' t) goes high, and the (output (FL)) goes low. ``Ninaru.A71'' circuit (AN 32)
(7) One input terminal is connected to the flip-flop (] ゛lower 79 output (F' D ), and the other input terminal is connected to the output terminal ('rL 6 ) of the decoder (DE4).
) is read directly, and the output terminal of the AND circuit (AN 32 ) is connected to the clock input terminal (CL) of the counter (COs). Therefore, the output (C
a1), (Cao) are flip-flops (FF7
) output (Fl)) becomes ``Ilight'', the timing of the next step (SI4) ('I'1.6) is
'o1; Timing of the next step (S 1s) (
'1-L6) becomes "10". Force r) 7 (COs) 0) Output (CaQ, (Ca
o) is the selection terminal (SI-) of the data selector (MP2)
) and the data human resources departments (C2) and (C3). The data input section (C1) of the data selector (MP2) has the output (La6) - (L) of the shift register (SR3).
ao) is connected. The most significant bit of the data input section (C2) is connected to ground.
The 2nd hit and 3rd bit from the - position are the outputs (Cat) and (Cao) of the counter (05), and the lower 4 bits are the output of the shooting distance information output device (1)S), respectively. It is being continued. Data Human Resources Department (C1) -L9
The digit bit is grounded, and the 2nd and 3rd bits from the 3rd digit bit are connected to the output terminal of the non-counter (C (J 5 ) (('1.a+). The outputs of the sunspot distance information output device m (FS) are connected to the hints.From this data selector (MP 2 ), a selection terminal (S L
-) if the data is 00, that is the data input section (αI)
If it is "01", the data from the data person JJ section (C2) is output, and the data is "01".
(4) The data from the data input section (C3) is output. Therefore, until the timing of (1'L6) of step (514), this data selector (MP2) outputs the data from the shift register (SR3). The address data sent from the camera body is output via the step (514) ('
:r'L6) to step (S's) (
1"1-6) until the data input section (C2)
Address data for 1 closest shadow distance and 1 female is output from , and after timing ('1'L6) of step (S+s), address data for focal length from data input riB (C3) is output. These shift registers (Sj(3
), information output device (1)S), (FS) and data selector (MP2) are ROM (IJ,,0+
) is provided as an addressing means for specifying an address. The output terminal of the data selector (mP 2 ) is RO
Of the address terminals (C7) to (rO) of M(ROl), it is connected to the lower 7 bits of the address terminals (C6) to (rO), and the lowest bit (C7) of the address terminals is connected to ground. There is. As explained in Table 2 above, this R(JM (I(0+)) has each data fixedly stored at a predetermined address, and is connected to the address terminal (C7).
The data fixedly stored at the address specified by the take to (rO) is output to the output terminal. The output terminal of this ROM (RO1) is connected to the input terminals -r-(Lb7) to (Lb3) of a shift register (SR4) as accessory data output means, and the remaining input terminal (Lb2) of the shift register (SR4) ), (Lb
+) and (T-bo) are connected to ground. This shift register (51), AND circuit (AN33),
(/■34), the flip-flop (t'F 6) is the soft register (
It has the same configuration as SR+), AND circuits (AN2), (AN3), and flip-flops (FF2), and the input terminals (L, b7) to (Ll) are connected at the rising edge of timing (1"L7). It takes in the data from O) and outputs the data serially to the output terminal (ou'r) starting from the third-order bit at the timing of the hard timing. One input terminal of the OR circuit (ORs) has a counter (
The output terminal ((1; L3) of the inverter (IN
+, and the other input terminal has a flip terminal.
The output terminal (F l) of the flop (FF7) is connected, and the output terminal is connected to the control I11 terminal r of the switch circuit (SC4).
It is connected to the. The switch circuit (SC4) is provided between the output terminal (our-r) and the terminal (Jl, 3) of the shift register (SR4). This OR circuit (
Depending on the configuration of the AND circuit (AN3U) and the switch circuit (SC4), and the configuration of the AND circuit (AN3U) and the switch circuit (SC3), the output (Fl) of the flip-flop (I'F 7 When there is a problem in transferring fixed data of the lens), the counter (
When the output terminal E (CL3) of CA) 4) is 'High', the switch circuit (SC3) is conductive and the power is input from the camera body side via the terminals (,,+1!i3), (,Jl3). The coming address data is transferred to the shift register (S
R: +), output 1, Suko (shi L3) or '''L
The switch circuit (SC4) conducts between IIJI and ROM (R(J1)) and the terminal (Jl3
) and (Jl3) to the camera body. In other words, address data and fixed data from ROM (I (OI)) are input and output alternately. Then, when the q output (F I) of the flip-flop (FF7) becomes HighN, the switch circuit ( SC4) remains conductive, and the shooting distance data and focal length data from l(OM (R(J + )) are transferred to the terminal (Jl3).
, (, Jl3) to the camera body. These are the Sui-Sochi circuit (Se3), (SC4), and the flip-flop knob (FF7). The AND circuit (AN30), the OR circuit (ORs), and the inverter (IN+o) constitute a second switching circuit that cuts data transfer between the camera body and the lens on the lens side. The operation of the circuits shown in FIGS. 4 and 5 will be explained below based on the time charts shown in FIGS. 6 and 7. First, p − in Figure 1
com (ll output terminal (02) becomes 'High' (Fig. 6 02), based on the pulse from the one-shot circuit (O5+) (Fig. 6 051), the free knob
The flop (1・F+) is set, and at the rising edge of the next clock pulse -1, the D flip-flop (υl”1) is set.
)'s q output becomes 'l-1i gh', the reset state of the counter (CO1), (CO2) and (CLJ3) is released, and the decoders (DE2) and (DE3) become ready for output. Also, when the flip-flop (FF1) is set, a clock pulse (cp i-) is output from the AND circuit (AN+) (Figure 6 Cl).
, this clock pulse (CP L ) is connected to the terminal (Jl2
) and (Jl2) to the lens+Itll circuit shown in FIG. On the other hand, when the output terminal (02) of μmcom (1) in FIG. 1 becomes J (high), the power supply transistor (13T2) in FIG.
Power is started to be supplied to the circuit shown in Figure 5 through the terminal (JLI) and U"). When the power supply to the camera body side is started through the terminal (JLI), the power-on reset circuit (PO3) is activated.
A pulse is output from the flip frog (FF7)
, I) The flip-flop (1) F s ) is reset at this rising edge, and the flip-flop (FFs
) is set at this falling edge. Then, at the first fall of the clock pulse (CI), 1) the 9 output of the flip-flop (DI'5) becomes 'I4high', and the reset state of the counters (CO4) and (CO5) is released. The decoder (1,) E 4 ) becomes ready for output. This completes the preparation for starting the data output operation. Next, in FIG. 4, the timing of (TBG) in the (So) step is Then the counter (CO3) becomes '001',
This data is transferred to the shift register (SR+) via the data selector (+VPo) at the timing of ('I'B 7).
). Then (1 of the next (S+) step
'Bo) ~ (TiS2)'s rise' - At the same timing, soft reno star (Sl (Rino data '000000
10″′ is sequentially connected from the switch circuit (SC+) to the terminal (Jl
3) It is output in series via + (Jl3). On the other hand, in the fJ5 diagram, the switch circuit (S
Since C3) is conductive, the clock pulse (C))
Shift the 1st data at the timing of the fall of tr of L) and take in the 11th primary data into the register (SR3) (Fig. 6 Lao, Lad, La2).The data from this shift register (SR3) is the data selector (
81P2) to the address terminals -r-(ro) to (ro) of l(OM(R(J+)) (Fig.
SB, Lao, Lad, La2), the data of the specified address is ejected from 01 to 10 (Ol). First, the Noftrenostar (SR3) in Fig. 5 (D Output (■, ao) - (1,, ao) is (S+) 7. The falling edge of the clock pulse at the timing of step (7X T I-6) The output becomes “0000001” (
Figure 6 Lao, Lad, La2), technique OM (Rut
) is specified with the address "00000001". Check data "11100" is stored at this address as shown in Table 2 mentioned in i1, and this data is output from RU8 ((RO+). This output is ('
The timing of I'L7) -8 and shift]
- rH'l is loaded into the register (SR4). next(
S2) Step timing (TLo) ~ ('I'L7
) is the output terminal (CL3) of the counter (CO4)?'
i, ow”, the timing ('ILo) ~ (TL
7), the data output from the output terminal (L+) 7) - (1130) of the shift register (4) is sequentially transferred from the switch circuit (SC4) to the terminal (J13). (, l83) to the camera body in series.7.
(Figure 6 Sl3). In Figure 4, data is sent from the lens (S
2) In the step, the color/cut output (CI3
3) The 7.inf circuit (SC2) is conductive. In the image, the 1fii circuit (Jl, , :l) and (, Jl3) are connected. The input check data “111oo” (Fig. 6 S
R) is connected to the soft register (Sl(2)) at the falling edge of the clock pulse (P) via the switch circuit (SC2).
(Figure 6B+)0~+5b4). and clock pulse (CP) of timing (TB4)
At the falling edge of this shift) register (Sl(2)) output becomes °'11100" (Fig. 6 Bl) 0 to B+
)4), (1-1ss), the pulse output from the AND circuit (AJ'Js) (Fig. 6 AN
s) Standing” - Karitte Shift Register (SR2) 71
) The data from the latch I path (LA) is applied. Then, at the timing of ('1136), the AND circuit (
The rising pulse from AN+o) - then the latch circuit (
The data from LA) is stored in the register (RJCGo) (FIG. 6, /lJN+o). (S2) By outputting a pulse from the AND circuit (AN?) at the step timing ('IIS 6), the counter ((,;03) becomes '010', and (I'
The data of 000001-00°' is taken into the shift register (51(+)) of the shift register (1S7). Then, at step (S3), the COI counter (COI
) output terminal (C84) becomes 01g11", the switch circuit (SC+) becomes conductive, and further the counter (
The output terminal (Cl3) of CO4) becomes lligb' and the switch circuit (SC3) becomes conductive. As a result, the address data from the shift register (SR+) is taken into the shift register (SR3) in FIG.
1) address terminals (rO) to (rO) can be obtained. Then, the rising timing of ('l'L7)
ROM (RO+) address ゛'ooooooυ
The data of the exposure error ΔEvo stored in JO'' is taken into the shift register (SR4).Here, 1.
Record ΔI! : The data of v o is Δ' et al.110 in the example of Table 2. = 2/8 '0001 (1", but the 6th
Time chart 1 in the figure is “'00100” (ΔEvo
= '/s). At step (S4), the counter (C (Jl) terminal (C84), the counter (C (J4) terminal (Cl
3) is '1. , ow” and the switch circuit (SC
2) , (SC4) is conductive, and the "ooioo" data from the shift register (SR<) is transferred to the shift register (SR2), interpolated with the above, and ('I'13
This data is latched in the launch circuit (+,, A) at the timing of 5), and the pulse from the AND circuit (A, No) is output at the timing of (TI36) (Fig. 6 AN +
+) and the data of the exposure error ΔEvo is stored in the register (K+). Similarly, in step (55), “000001
10" address data is sent to the lens, and in the (SR) step, data of the maximum aperture value Δvm is sent to the camera body side, and at the timing of (T'B 6), it is sent to the register (Technical EG).
2). (57) In step °'010
1000” address data is sent to the lens (S8
) step, the data of the open aperture value Δvo is sent to the main body side (1'B6) timing C register (1 (1
, 3). (S9) '000 in step
01010" address data is sent to the lens, and (S
In step lo), the data of the shortest focal length fW is sent to the main side, and at the timing of (Tf36), it is sent to the register (REG).
4) adds +17. (Sl) The step is “'0
0001100" address data is sent to the lens,
In the step (S I 2), the data of the shortest focal length f[ is sent to the main body side, and is taken into the register (S EG s ) at the timing (TB6). When the output of the counter (CO3) becomes "110" at the timing (-r"B6) of the step (Slo), the output of the AND circuit (AN2υ) becomes 111gH", and (Sl
) step timing ('口3o) l) Flip, the q output of the flop (field 2) becomes 'Ilight'. As a result, the data selector (MPo) selects the output of '00010010' from the input terminal (R0). Output fixed data. This data shows that the Camerane field is a Camerane field of the 2Q] (Φ class) among the multiple types mentioned above. The stored data is taken into the 7-foot register (SR+) and is sequentially output from the output terminal (OLIT) in step (512). However, in this step (S12), the switch circuit (S
Since C+) is unequal, it is impossible for the lever data to be sent to the lens side circuit (FIG. 5). At the timing of (11 to 7) in step (512), press the circle O deku selector (
The data "0 (JOlooN)" from MPo) is taken into the 7-field star (SL), and in the step (5 ports), this data or the switch circuit (SCl) +! I+1
The shift register (Sl(3) is connected to the circuit on the lens side of Fig.
) will contain this data. And KO at the timing of ('1c7) of (513)
The photometric error Avc data stored at the address '00001001' of M (1) is '0 (J (JIO)
(Avc = -6/s) or shift register (SI
(4), and this data is sent to the camera body. The example in FIG. 4 shows the case of the second type of camera body. If it is the 31st type of camera body, the input data to the data selector (+vIP R0) is 'ooo1ouoo'. RO+\1 (By specifying the address ``00001000'' of ROQ, the photometric error data for the first type of camera body is output.Similarly, for the third type of camera body, data selector ( bll' o ) to (R0) is "00010100", then R0M (1(L)
l) is specified as the address ``000 (JLOIO)'', and the photometry error data for the third type of camera body is output. With this, reading of the fixed data of the lens is completed. (513 ), the timing ('IL6
) When the clock pulse (CPL) falls, the output terminal (La3) of the shift register (SI) in Fig. 5 becomes '1'.
(Fig. 7 La3), and the timing (T
L7) The output of the chain circuit (AN35) is 'H'.
Standing on igh'-L, flip-flop ()'F
7) is set and its terminal (FD)
", (F'lJ) becomes %Lo%VH+c. As a result, the output terminal 7- (of the counter (CO4)
Regardless of the output state of CI・3), the AND circuit (AN
The output of 30) is 'Low', and the output of the OR circuit (ORs) is 'tlight', respectively.
s) or nonconducting IIIJ, the switch circuit (SC4) becomes conductive, and from then on, the state is simply to send the lens data to the main body. In the step (514), the photometry error data is transferred, and (TI3 g ) from the AND circuit (AN, 6) is transferred.
At the same time as the above data is taken into the register (KEG 6) by the pulse at the timing of , the AND circuit ()
The pulse from the output terminal (endl) of 16) is set to flip flop (FF3) (see Figure 7).
+6. endt. FF3), and thereafter the output terminal (C
]33) The output of the AND circuit (AN4) is ``Low'' and the output of the OR circuit (OR3) is ``+4''.
igh” and the switch circuit (SCI) becomes non-conductive.
The switch circuit (SC2) becomes conductive. Therefore, from now on (
′! This makes it possible to accommodate data such as lens power). At the timing of (TL6) in step (514), the Nonorus from the 7th node circuit (AN32) is activated by the timing of (TL6) in step (514), 'UIJi force +-! ”0
1" (Fig. 7, Cao, Ca 1). As a result, the data selector (MP2) outputs the data from the data input section (C2), and the address of the ROM (ROl) is specified by this data. II-j
j, the upper 4 bits and nodes of the address data of this ROM (RO1) are '0' corresponding to the output of the counter (ω5).
001'', and the lower 4 bits are 4-bit data from the shooting distance information output device (O5).As shown in the example in Table 2, this address area contains the address power i''00.
010000" is '01010' which indicates 1.4m.
If the data is "00010001", it is 1.7m.
'01011' data indicating '0001111'
If the data of 0" is 00011111'", it will show the head.
ll+1" data or 4t each. ko(D 11il f i/Ii xlt no data(
Dv) is taken into the soft register (SR4) at the timing of ('rl-7), and at the falling edge of the clock pulse (cp) at the timing (1-B o ) to (1'B4) of the (SIs) step. The shift register shown in Figure 4 (
SR2) (Figure 7 Old] 0~B l)a
), ('Tm & ), the latch circuit (1,
, A) The data of the shooting distance is input to the register (R1':C7) by the output pulse (AN+7 in Fig. 7) of the AND circuit (AN+7) at the timing of ('l'B6).'+54 It gets absorbed. At the timing ('I'l・6) of step (S15), the counter ((1)s) is an AND circuit (AN32)
7 (response and output is ' l O' (Fig. 7C)
ao, Ca+), f-9 cell L/kuta (MP z) outputs data from the data manpower section (C3). As a result, the minus 4 bits of the ROM (KO+) address become '0010'°, and the lower 4 bits become data from the focal length information output device (TOS).
As shown in Table 2, the focal length data corner 1 is stored in the data address of the focal length. However, "0 old 01010" is data indicating 1105 mm "I 00 (10")
force), 001 (111] 1 ``That is 1135a
Data indicating im ``ioυO1'' or Rt respectively)
%f (output from RU. This focal length data (+5) is sent to the shift register (SR4) at the timing ('1'l・7) of the step (S, +5) in the same manner as described in ii. and (' in step S16).
I'Bs) timing information ・Sochi circuit (LA month) is taken in, and register (1'B 6) timing is taken in.
This -5·-Ito7)) is accommodated in R1·', G)l). At this time, the output (cnd2) of the ant circuit (ΔN +s)
) should set flip-flop (1/F4) 7
Figure ANIII. cnd2. I'l'4), μmC0ITI (Sends the signal 111g11" to the input terminal (13) of 11.μm
com (ll ; As mentioned above, when the human power jjj, j (+3) or
) to 1. OW" and power supply to the lens side t'P, d
:, let. 1- From the phone/s to the camera body (+111
4 interface times; 1'6 ('') of the data is entered or terminated. Next, μmC (1111 (1j:, 1 interface times ifi'i (''') μm ((river + (1) -..., data bus (1) 1)
Start reading from 1) 1.j. First, μm C0III
Is the data from the output terminal (UP 3) of Ji) '5H?
11, the output terminal (a) of the decoder (DEI) is
iligb', check data from the register (REGo) is output to the data bus (DB) via the data selector (MP l), and this check data is
com(ll). Next, when the data of (<JP3) becomes 6H", the terminal (al) becomes +1high" and the data of the register (R+<G I) is transferred to the data bus (+
) is read into μmcam (1) via B). Similarly, registers (iEG 3) to (KEGg)
The data from μ-c is sequentially transmitted via the data bus (OB).
om (1), and when the reading is completed, μmcom (1) according to the flowchart in Figure 2 above.
moves to the next operation. Note that the shift registers (SRs) for address data output in FIG. 4 and the shift registers (SR4) for accessory data 111 output in FIG. , timing 11'1B7
), (King 7) stood up and was man-powered in 12 columns)
After that, the timing ('l'ls o
) ~ ('1-1 to 7), (TL o ) ~ ('l'l
The data is output in series to the output terminal (OU'r) sequentially from the data of -7) rising +) Jj ritte most'' third place bi, ・g. A shift register that performs such an operation has the following circuit configuration. First, eight flip-flops are provided in each valley and node, each of which is preset with each bit of data input manually in parallel. The output terminal of the flip-flop corresponding to the lower hit is connected to the input terminal of the flip-flop corresponding to the third-order bit immediately after the lower hit. By doing this, each flip is synchronized with the clock pulse.
The data preset in the flop is sequentially transferred from the lower zero bit to the first bit. Furthermore, the output terminal of the flip-flop to which the data of the highest hit of 8j is preset is connected to the input terminal of another ninth flip-flop. Then, the output terminal of this ninth flip-flop is used as the output terminal of the NFF I register. This is what you do. The ninth flip-flop takes in the output of the flip-flop in which the data of the most significant hint is preset in synchronization with the clock pulse, thereby outputting data with a delay of exactly one clock pulse. The overall embodiment of the camera to which this invention is applied, which has been described in detail below, can be modified as follows. Most of the control operations of the control section for the slip and cue time are μmcam (11
The function can be improved by 4-, and the number of external circuit components can be reduced. Also, when data is read in series from the lens to the interface circuit ()F) on the camera body side, if the data that has already been read is read in parallel to μm con+ (1), further μmCo1■l (1) The time to load data can be reduced. Also, in the flowchart of FIG. 2 of this embodiment, μ
mco+n(1) is designed to operate all the time, but if μ-com [1) is operated all the time, it will consume a lot of power and the power battery (BA) will be exhausted, so it should not be used. In accordance with the functions of μmcom, the program may be predetermined so that μmcom does not operate when it is not necessary to operate. Since this can be easily realized by a person skilled in the art, a specific example of μmcom and a flowchart (program) suitable for that μmcom will be omitted.
(The following margins) Furthermore, in the two embodiments, interchangeable lenses were used as camera accessories. Light emitting device and motor drive. A data pack, a lens accessory, or the like may be used as a camera accessory to control the exposure value calculated by the camera body using data from the accessory. For example, data of 1× (maximum light emission amount) manually set by the flashlight emitting device 6' (however, N>1) and tj from an interchangeable lens or a hero's. +l:, F
It is a good idea to calculate the irradiance value or to Europeanize the shutter speed in accordance with the photographing cycle obtained from the motor drive or the data loop time given from the data pack. In the embodiment described above, the data fixedly stored in the fixed storage means of the camera accessory is data related only to the camera accessory, or for example, when an interchangeable lens is used as a camera accessory, it can be attached to the camera body. All data related to all the interchangeable lenses are fixedly stored in common in the fixed storage means of all the interchangeable lenses, and among these data, only data related to the interchangeable lens attached to the J Nomera main body is output. Camera accessories may also be configured in circuitry. Effects As described above, in the present invention, when the address of the fixed storage means provided in the camera accessory is designated from the camera body, the data of the camera accessory fixedly stored in the fixed storage means or the camera is stored. In a camera system configured to transmit data to the camera body, address data is serially transmitted bit by bit from the arrester output means of the camera body to the addressing means of the camera accessory, and the address data of the camera accessory is Accessory data, which is serially transferred one bit at a time from the accessory data output means to the accessory data reading means of the camera body, is transmitted to the camera body in a time-sharing manner at different timings via a common signal terminal. Switching circuits are provided on both the camera body side and the camera accessory side so that data can be exchanged between the camera body and the camera accessory, so both data can be transferred via a common signal terminal, and each signal terminal can be used as before. The number of signal terminals is halved compared to when a terminal is provided. (J"L has the advantage that the price of the camera body and camera accessories can be reduced by 1-yl, and the probability that the reliability and durability of the signal terminal will deteriorate is reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of a camera system to which an embodiment of the present invention is applied, and FIG.
A flowchart showing an example of the overall operation of com (],),
Figure 3 is a flowchart showing an example of the exposure operation, Figure 4 is a circuit diagram showing a specific example of the interface circuit (IF) in Figure 1, and Figure 5 is a circuit diagram of the data in Figure 1. A circuit diagram showing a specific example of the circuit of the output section (7), and FIGS. 6 and 7 are time charts showing the operation of this embodiment. RO+: Fixed storage means, C (J3 MI'OS
RI 1・1・2DF'2, AN2,)\N3
．． AN? , AN20. INO: address data output means, MP2. SR3 near address designation means;
SR4: Accessory data output means, SR2: Accessory data reading means, IB3: 1st terminal, JL3: 2nd terminal, 1゜SC2,L
Ding 3. /NN4. (JLq, lN6: @1 switching circuit, SC3. SC4, FF7. AN3o, OR5, 1, NIO:
Second switching circuit. Applicant: Minolta Camera Co., Ltd. Procedure Amendment Connection] 1f (', Display of 1 Patent Application No. 157893 of 1981 2 Title of Invention Data skimming device in camera system 1゛I”3
Supplementary J'I: Relationship with the case of a person who does

Claims (1)

[Claims] 1. In a camera system in which various types of camera accessories to be used in the camera body are electrically transferred from the camera accessories to the camera body, each address is provided on the camera accessory side. In particular, a fixed storage means in which the data described above is fixedly stored, an address data output lower stage provided on the camera body side and outputting data corresponding to the address of the fixed storage means 1 bit at a time in 11W primary series; Provided on the accessory sideff
1i address designation means for reading the take from the address data output means and designating the corresponding address in the fixed storage means; and an Ail record fixed window fixed provided on the camera accessory side and designated by the address designation means. Accessory data output means for reading the takes fixedly stored in the storage means and serially outputting them one bit at a time; and accessory take reading for reading data from the accessory data output means provided on the camera body side. and the address data from the address data output lower stage and the accessory take from the accessory data output means, which are provided at corresponding positions on the camera body side and the camera accessory side, respectively, and output the address data to and from the phase j4-. 1 and 2nd signal terminal, and the camera body side (this is provided, address data transfer from the address data output lower stage to the hit list first signal terminal, and means for reading the accessory data 1 from the first signal terminal) Accessories to - the first to switch data transfer in a time-sharing manner
a switching circuit provided on the camera accessory side, and a first switching circuit provided on the camera accessory side.
In conjunction with the switching operation of the switching circuit, address data is transferred from the second signal terminal to the address designating means and accessory data is transferred from the accessory data output means to the second signal terminal. 1. A data reading device for a camera system, comprising: a second switching circuit that switches transfer in a time-sharing manner.