JPS58199330A - Data reader in camera system - Google Patents

Abstract

PURPOSE:To execute photographing easily and exactly by a simple constitution, by applying repeatedly a data transfer start signal to a camera accessory while a manual operation is executed, and executing automatically the read and transfer of a data signal. CONSTITUTION:When a photometric switch MS of a photometric circuit 5 is closed manually, an output of an invertor IN1 is inverted to a high level through an interface IF. As a result, a high level data transfer start signal is outputted from a terminal O2 of a microcomputer 1 and is transferred to an accessory LE through the interface IF, a camera side terminal JB3, a terminal JL3 of the accessory LE such as an interchangeable lens coupled with said terminal, etc. In accordance with this movement, a data is read from a data output part 7 of the accessory LE and is transferred to the computer 1 through the same terminals JL3, JB3, the interface IF and a data bus DB. In this way, photographing can be executed easily and exactly at all times, by a simple constitution by which a data corresponding to a transfer signal of said every manual operation is read and transferred automatically by jointly using a common terminal.

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a digital fixed storage of data that is unique to camera accessories such as interchangeable lenses, intermediate rings, and flashlight devices that are attached to a camera body, and that should be used in the camera body. The camera accessory has a built-in fixed storage means such as ID to I7, and by specifying the address of the fixed storage means, desired data is transferred from the camera accessory to the camera body, and the transferred data is Regarding the data reading device of a camera system configured to perform data processing in the camera body based on One piece of aperture value data is selected from among multiple aperture value data at a time. Regarding data reading. v1 Song technology In general, data reading involves data processing (for example, displaying variable data such as set aperture value and shooting distance data in the viewfinder of the camera body, or performing exposure calculations based on this data). (e.g., light metering/display switches) that are manually operated to perform
It is started by being manipulated. When attempting to perform such data reading and data processing digitally, operations are performed based on a sequence in which data is read and then data processing is performed, so it is necessary to temporarily store the read data. Therefore, in this case, since data reading and data processing can only be performed once in one manual operation, the following problems arise when changing variable data once selected. First, when displaying, the variable data displayed in the viewfinder is the data selected during the assistance operation, and the data currently being changed is not displayed in the viewfinder, so when trying to check the changed data, the photographer Take your eyes off the viewfinder and directly check the operating parts of camera accessories.

[, it is inconvenient to have to
. Next, when performing calculations, four outputs are generated based on the calculation results.
Lifting is controlled, even if the data changes after manual operation
The above pain relief results are not updated, so proper exposure cannot be obtained.
There are some bad things. For example, depending on the change in focal length, the optical system
The angle at which the exit pupil is viewed from the point on the optical axis changes17,
A zoom lens in which the actual aperture value changes to a value different from the set aperture value.
There is a zoom lens, but this zoom lens can be used during calculations.
If you shoot at a focal length different from the focal length, the above fringe value will change.
The difference will be an exposure error. In addition, the light emitted by the flashlight emitting device
Based on the aperture value and shooting distance of the device and interchangeable lens.
In order to obtain proper exposure [7] so-called flashmatic
Even when shooting, the set aperture value or shooting distance data is not available.
If it is changed after a dynamic operation, it will result in an exposure error. Therefore, each time the data is changed, the photographer is required to manually operate the operating parts.
data processing every time the data changes.
However, manual operations are repeated every time the data is changed.
Returning the camera is easy for the camera stand to forget, and it is inconvenient for the camera operation.
Always complicated and impractical. Also camera accessories
– to transmit information to the camera that data has been changed.
Reaching ρ more self-helply data reading and data
You can also configure it so that
If the camera is connected between the camera accessory and the camera body,
Command data transfer from camera body to camera accessory
from the signal terminal and camera accessory to the camera body.
Data reading called signal terminal to transfer data
In addition to the signal terminals required for the camera accessories, the above information
An extra signal terminal is required to send the signal from − to the camera body.
becomes. This increase in the number of signal terminals increases the price of both.
, or reduce the reliability of the signal terminals.
Problems arise. Purpose The present invention provides a variable data storage device fixedly stored in a camera accessory.
The data is read for data processing in the camera body.
Responds to manual operations (data reading performed in 7)
In the storage device, variable
Let's provide a device that can automatically read data
That is. SUMMARY The present invention is adapted to manual operations performed for data processing.
Answer I: The data transfer start signal is sent to the camera accessory.
from the camera accessory based on this signal.
Make sure the camera system starts transferring data to the camera body.
configuring the system and ensuring that at least manual
The above signal is generated repeatedly while the
The data processing is performed repeatedly and self-restrictedly.
be. (Left below) Example Figure 1 shows an interchangeable lens (LE) attached to the camera accessor IJ.
-T, the entire camera system to which the lever invention is applied
FIG. 2 is a block diagram showing the circuit fIIt. In addition, Figure 1
The bold line portions of the signal lines shown in Figure 5 below are
A signal line computer or computer where several bits of data are transferred.
microprocessor (hereinafter referred to as μmcom).
Ru. Power-on reset circuit (PO is on the camera body)
When the power battery (BA) is installed, a power-on reset signal is generated.
signal (Pi), and this signal (pttt) is reset.
μmcorn
(1) is reset. The oscillation circuit (OSC) outputs a reference clock pulse (CP).
This clock pulse is μmC0fft(
11 clock input terminals (CL) and other blocks
This clock pulse (cp) causes the first
The entire camera system shown in the figure is synchronized for the 6th edition.
It is being The display unit (DP) is, for example, time-divisionally driven.
It is composed of a liquid crystal that is divided into μmcom (1)
To the signal from the main terminal (Skn) and the common terminal (Naki1)
Based on the exposure control value display, 4-output control mode display, alarm
This is a display section for displaying notices, etc. μm com
(11+oscillator (OSC), display section (1)P) and
An interface circuit (II-) to be described later. Inverter (INl) ~ (INS), AND circuit
(ANO) is directly connected to the power battery (HA).
Power is supplied from the power line (10E). The switch (HIS) as a manual operation means is used for photometry operation.
Interlocking [7] This is a photometric switch that is opened.
When MS ) is closed, μmcom (□ input terminal of 11
The child (11) is connected to High via the inverter (IN).
” operation signal is input and μmcom (1) performs exposure control.
data loading, photometric output A-D conversion operation, exposure
Itching begins to appear. Forward, this switch (MS
) and inverter (IN 1) are the operation signal output means.
It is formed. Also, the photometry switch (MS) is closed.
The power supply transistor (HT) becomes conductive by
The above-mentioned circuit that is supplied with power from the power line (10E)
A power supply transistor (B
Power is supplied from the power line (IVB) via the T.
Ru. Furthermore, the opening of the power supply by the power supply IVB (IVB)
Power-on reset circuit (reset from PO)
The output signal (Ple 2) is output, and this signal is
Output time control device (CR), aperture control device (CA)
reset each device. The block (3) surrounded by a broken line is the exposure control section, and
Time control device (CT), aperture control device (CA) and
It is formed from a pulse generator (f'G). The exposure time controller (CT) is equipped with μmcom (output 11).
Calculated or set exposure time from power terminal (OPl)
When the data Tv is input, the device fl (CT)
The time corresponding to the data Tv (i.e., the shutter opening time 1
The time up to Haeki 2 T”/
) + Created based on this [7, thereby controlling the exposure time
do. The aperture control device (CA) has a μmcom (output end of 11).
Number of refinement stages calculated or set from child (CP2) -
The data Av −Av'o (the meaning of this symbol will be explained later)
) and pulses from the pulse generator (PG) are input.
I'm under pressure. Pulse generator (PG) is a camera
Rotation amount of the aperture ring (13) provided on the main body
Outputs the number of pulses according to the number of pulses. Here, the filter link
The protrusion of the ring (13) is the aperture pin on the lens (LE) side.
(15) is in contact with the lens (L) when the lens is attached.
Set the aperture pin (E) so that the aperture value becomes the open aperture value.
15) is biased [7] by a spring (not shown). On the other hand,
The aperture pin (15) on the lens side is connected to the unillustrated bar on the lens side.
Due to the spring force, the spring force is weaker than the spring on the camera body side.
It is biased to a large aperture value of 1jl11. Such a mechanism
As the aperture ring (13) rotates, its rotation increases.
The aperture pin (15) rotates by the same amount as the lens
(bg) The aperture is the amount of rotation of this aperture pin (15)
The image is narrowed down based on the aperture value. Therefore, the aperture control device
(CA) is the rotation of the aperture ring (13).
17 pulse generators corresponding to the number of narrowing stages of lenses (LE)
This counter counts the number of pulses from the
value and μ-com (output terminal 11 (aperture from OP)
Comparing the data Av-Avo of the number of steps, it is found that both are
When a match is found, the rotation of the aperture ring (13) is stopped.
Determine the aperture 11. The block (5) surrounded by the broken line is ≠ Aji-kai Concubine Temple Ki 4-exposure system
This is the data output section that outputs the main data, and the photometry circuit (
ME), A-D conversion circuit (AD), set aperture value signal output
device (As), set exposure time signal output device ('t''8)
, film sensitivity signal output device (SS) and monophotometry
The circuit uses B according to the brightness of the subject and the maximum aperture value of the lens.
Outputs Y-Avo analog signal. A-1) The converter (AD) is connected to the interface circuit (l
When the terminal (s'r) of F) becomes “High”, the clock
from the photometric circuit (ME) based on the clock pulse (cp).
A-D converter that converts the above analog signal into a digital signal
Start the conversion operation, and while this terminal (ST) is “High”
A-13 conversion operation ends. And this A-D conversion
The data By-Avo is sent to the interface circuit (I
t'). The set aperture value signal output device (As) is the lens (L E)
Data A according to the setting position of the aperture setting ring (11)
Output vs -Av'o. This exit device (As)
A specific example is shown in FIG. In Figure 2, the sliding part
Material (VT) corresponds to the setting position of the aperture setting ring (11)
is set to the specified position (any one of ■ to O), and
The part that is integrated with the aperture setting ring (11) on the lens side
A mechanical lick corresponds to the setting.
will be stopped. The continuity pattern (CT) is grounded.
, the conduction pattern (PAO) of the pond (PAO)
Connected to the power line (+V B ) through the resistor [2]
Ru. Therefore, the contact piece of the sliding member (VT) has a conductive pattern (
PAo) ~(FA4) (7) When you come into contact with any
, conduction patterns (PA o ) to (PA 4 ) are selected.
short-circuited to conductive traces (CT), these conductive traces
Connected to turns (PAo) to (FA4) respectively.
The output of inverters (IN20) to (IN24) is
Selectively becomes “High”. On the contrary, the sliding member' (VT
) is in contact with the conductive pattern (PAo) ~ (PAri)
When not, inverter (IN2 o) ~ (IN
24) are both “Low”. And I
The output (d4) of the converter (IN24) is exclusive
One input of the converter (additional 3) and the interface circuit
The inverter (IN23) is connected to the
Connected to the other input of Scrusive OR (additional 3).
Ru. This exclusive OR (EO output (d3)
is the interface circuit (IF) and exclusive
(connected to one side of the inverter)
(IN22) output is exclusive OR (AD2)
The other is connected to the input of 1, and the exclusive OR ((1
)'2) output (d2) is the interface circuit (IP
) and exclusive OR (connected to one input of
has been done. Inverter (IN2 output is
- connected to the other input of the
Scrusive or (the way the addition (dl) comes out is the interface
base circuit (IF) and exclusive OR (FA) o)
is connected to one of the hekas. And the inverter (
The output of IN20) is exclusive or (EOO).
connected to the other input and exclusive or (
The output (do) of addition 0) is the interface circuit (IF)
It is connected to the. Note that the interface circuit (I
The terminals (d4) to (dO) connected to P) will be described later.
The register in the interface circuit (I P )
It is connected to the input terminal of the star (Rhae). Continuity patterns (PAo) to (PA4) are gray code
and based on this code at each position
Inverter (11'1J2G) ~ (INz input and 4
I child. The outputs of (do) to (d4) are related, and
The relationship is shown in Table 1. In addition, Table 2 shows each
Output of terminals (dO) to (d4) at position and number of convergence stages
This shows the relationship between (Leaving space below) Table 1 Table 2 Below are the set aperture values and the setting positions of the sliding member (VT).
I will explain the relationship with ■. Fl, 2~F22 Len
When the aperture setting ring (11) is Fl, 2 (Av
= 0.5), the sliding member (VT) beam
), and from terminals (d4) to (d)
The data “ooooo” with the number of stages O is output, and Fl
, 4 (Av=1), the sliding member (v'
r) is located at the position ■, and is connected from terminals (d4) to (do).
The data “00001” with the number of refinement stages 0.5 is output.
It will be done. Similarly, with 17, F l 9 (Av = 8
．． 5), from terminals (d4) to (d)
The data “10090” indicating the number of refinement stages is 8 is output.
If set to F22 (Av = 9), the filter will be narrowed down.
Data “10001” indicating the number of stages is 8.5 is output.
. In this way, the maximum aperture value of the lens is Fl, 2. Fl
,4. F2, F2.4, f”2.8, F3.4
, F4, F4.7, that is, converted to Av.
Time Av = 0.5 H1*1.5, 2, 2.5, 3,
An integer where the value of Ay is 0.5, such as 3.5, 4, 4.5
If it is double, the number of refinement stages is indicated using the 5-bit data mentioned above.
The data to be output is the output aJ function. By the way, some interchangeable lenses have an aperture value of F&5 (
Av = 2.64), F3.5 (Av = 3.
61), Fl, 8 (Av = 1.7)
, F4. , 5 (Av = 4.34), F6, 3
(Av −= 5.31), the Av value is
There are some interchangeable lenses that are not 11 times larger than 0.5. child
When wearing Noyo Una interchangeable lenses, the following will occur.
Problems arise. In other words, the aperture output from each position
The data for the number of steps is 1. based on the position of the open aperture. Ta0
, 5 Since the value is in Ev units, the number of refinement stages is
Calculate the data and the open aperture value data obtained separately.
The set aperture values obtained are the above Av=0.5, 1, 1
．． The value is outside the series of 5..., and the aperture setting is
An indicator is provided on the fixed ring to indicate the actual aperture setting.
Not only does it not match the numerical value, but it also differs from the actual set aperture value.
Since the set aperture value obtained by calculation is different, this may cause an exposure error.
Ru. In addition, with general cylindrical lenses, except for the open aperture position
The index value of the aperture value corresponding to the position after the position ■ is F.
5.6. It is a normal 0.5Ev unit value such as F8.
There is. Furthermore, the open aperture value data is Q, 5j (in units of v).
Since it is not , the number of bits for outputting open aperture value data is
It also increases. Also, as mentioned above, the maximum aperture value is set in units of 0.5Bv.
When attaching a lens that is not
Adjust only the click position from the maximum aperture value in 0.5EV increments.
It is also possible to change the position from ■ according to the amount of deviation.
However, the amount of change from the shifted open position to the
To read, increase the number of bits in the conduction pattern.
It is necessary to As a result, the code pattern becomes more complex and minute.
High precision is required or the board area for the code pattern is large.
This may cause problems such as hearing. Therefore, in this system, the maximum aperture as described above is
Aperture setting for lenses whose value is not 0.5Ev11th
When the ring (11) is set to the open aperture position, the sliding
Place the member (VT) in the position of ■, then click
At the position (■ position), set aperture value number in 0.5Ev units.
I will make it happen. To give a specific example, the maximum aperture value is F.
If 2.5 (Ay = 2.64), then the position of ■
So, set the aperture value to F2.8 (Av=3)
Make it. Therefore, narrowing down from the position of ■ to the position of ■
The number of steps is 0.36 (even though it is not 7, from wide open aperture
Data equivalent to narrowing down by 0.5 steps ``oooooi
” is output.Then, the maximum aperture value of the interchangeable lens is displayed.
The data is Q, 5 bits of data is input at about 5Evlt.
In the case of this interchangeable lens, it is 0.5Ev.
Corresponds to unit F 2.4 (Av=2.5) (7 data
is input, and the data for the number of stops and the maximum aperture value are
The actual aperture value is obtained from this. Therefore, correct the set aperture data at positions other than ■.
Accurate reading = I ability. ”7, no matter what
The sliding member (VT) is at the click position even if it is 7" against the lens.
Comes to the center position of the code pattern corresponding to each code value
Therefore, reading error due to rattling of the sliding member (VT)
It does not occur. Next, the open aperture value data is the (aperture position) of the interchangeable lens.
The aperture value is 0.5 steps open from the aperture value at
F 2.4 (Av = 2.5) ) data and this
The difference between the maximum aperture value and the actual maximum aperture value (0,14)
data is entered separately from the interchangeable lens.
, obtain the actual open aperture data from these two data.
I try to do that. Therefore, the number of bits of each data increases
There's nothing to do. A general explanation of the above is as follows. Setting
Fixed aperture value is Avs, actual open aperture value is Avo, ■ place
Avo, Avo and Av
Let the difference in o be ΔAvo. First, the aperture of the lens (LE)
The above setting aperture value signal output via the setting ring (11)
Data on the number of narrowing stages from the device (As) Avs-Avo
is obtained, and Avo and Avo can be obtained directly from the interchangeable lens (LE).
Data of ΔAvo is sent. These two data are
As described later, the data output section in the interchangeable lens (IJ)
(7) (FIG. 1) is fixedly stored. And this
Based on the three data, (Avs - Avo) + Av5 = Ays
−(11Avo+ΔAvo=Avo
- By performing the calculation in (2), the set aperture value Ays and
The actual open aperture value Avo is obtained. Note that the aperture cannot be adjusted to the position set with the aperture setting ring (11).
Once the entry pin (15) is narrowed down, further narrowing down is possible.
The pin (15) is mechanically constructed so that it cannot be moved.
(i.e. the rotation of the aperture setting ring (11))
The rotation d of the rolling pin (15) and the rotation of the narrowing pin (15) are equal.
This system is applied to (interchangeable lenses) [7].
Countermeasures are necessary. Movement from position ■ to position ■ fit is 0.5Hv
However, the actual number of aperture stages depends on the interchangeable lens.
Is there a need to vary it depending on the situation? In other words, the open aperture value is
0.36 stops for F2.5, 0.3 for F3.5
If it is 9 stages, Fl, 8, it must be O4゛3 stages, etc.
There is a point. Therefore, with the mechanical structure inside the interchangeable lens,
Move the aperture pin (15) from the ■ position to the 0) position.
While moving, an F2.5 lens has only 0.36 stops of actual
The aperture is narrowed down and the range changes from ■ to ■, and from ■ to ■ (the same applies hereafter).
The distance is equal to the number of movements of the focusing pin (15) L < 0.5
The actual aperture is narrowed step by step. child
The amount of movement of the aperture pin (15) and the actual aperture value
The graph in Figure 3 shows the relationship between In Figure 3, the vertical axis represents the actual aperture value of the stitching, and the horizontal axis represents the actual aperture value.
Movement of the focusing pin (15), Iil is shown. The dashed-dotted line is for a lens with an open aperture of F2 (Av=2).
This is a graph showing [7], and the filter pin (15) has been moved.
As you move, the actual aperture will gradually narrow down from F2.
To go. Therefore, if the planned aperture value is Av, ΔAv
= 0, so (Av-Avo(=Avo))
Compare the data with the data of the movement amount of the narrowing pin (15)
Comparison [2] When both match [7], narrow down pin (15)
If you stop the movement of , the actual aperture will be the predetermined aperture value Av.
will be controlled by. On the other hand, the maximum aperture value shown by the solid line is F, 2.5 (Av
= 2.64) or the open aperture value shown by the two-dot chain line is F
1.8 (Av = 1.7) (D
) AM, narrowing down Mihin (15) is equivalent to ΔAvo
The actual aperture value is the maximum aperture while the aperture moves by the amount
The value remains the same and is narrowed down to an amount equal to or greater than ΔAvo.
When the lever (15) moves, the amount corresponding to the amount of movement
Only Av'. The aperture of the lens is adjusted so that the aperture value is narrowed down from
The structural part is constituted by a known cam mechanism. Therefore,
Even in the case of such a lens, Av −Av'o
Compare the data with the data of the movement amount of the narrowing pin (15)
If both numbers match, move the narrowing pin (15).
By stopping the aperture, the aperture can be controlled. The configuration of FIG. 1 will be explained again. Setting exposure time signal output device
The position (TS) is the exposure time setting member (not shown) on the camera body.
) corresponding to the exposure time manually set by
A device that outputs interface data.
Register (H, 1) Gto) in the bus circuit (IF)
(mentioned) is connected to the input terminal of the Film sensitivity signal output
The power device (SS) is the film sensitivity setting member on the camera body.
Compatible with film sensitivity set by (not shown)
A device that outputs digital data that is
Register in the interface circuit (IF) (source st)
(described later) is connected to the input terminal. Mode signal output
Riso mcM8) is a mode setting member (not shown) on the main body of the camera.
Manually set exposure control mode or flash
Terminal (J) from the light device (PL) to the flashlight device (FL)
FI), input via the terminal (JBs) on the camera body side
The main capacitor (unused) in the flash light emitting device (PL)
Compatible with flash photography mode based on charging completion signal (as shown)
output the digital data. This output is a register in the interface circuit (IP).
(HEGI is connected to the input terminal described later. The interface circuit (IF) is connected to the output of μmcom (1).
When the power terminal (0) becomes “output gh”, the interchangeable lens (L
Start reading various data of E) and insert the interchangeable lens (
When the reading of various data of LE) is completed, the interface
The output terminal (8T) of the face circuit (IF) is “H4gh”.
” and performs an A-D converter (AD) or AD conversion operation.
. 2. When the A-D conversion is completed, the interface
The switch circuit (IF) is connected to the exposure control data output section (5).
Load each data sequentially. And load all data
When the process is completed, the output terminal of μ-com (1) <op;>
in the interface circuit (IP) according to the signal from
Out of μmcom (1)
to μ-com (1) via the data bus (1)B)
Output. Note that this interface circuit (IF)
A specific circuit example is shown in Figure 5, and detailed operation will be described later.
do. (F'C) is the flash light emitting device (FI,) on the camera body side.
Terminal (JB6) on the main body side. Terminal on the flashlight device (FL) side (light emission is opened via the JF cable)
Send the start signal from the main unit to the flash light emitting device (FL)
. Furthermore, the terminal on the main body side (JB7), the flash light emitting device (
The camera receives the light emission stop signal via the terminal (JF3) on the PL) side.
It is sent from the camera body to the flash light emitting device (FL). Light emission start signal
is sent out when the shutter is fully open, for example.
The light stop signal is emitted by a flash light emitting device (FL), for example.
Of the illuminated object light, the light passes through the aperture of the lens (i, g).
The integral value of the light reflected by the film reaches a predetermined value.
It will be sent at that point. This configuration allows for flash light emission.
Device I (FL) is the main capacitor (not shown).
When the voltage reaches a predetermined value, a “High h” signal is sent to the terminal.
Output to (J F t ) [7.4-P (Emission from JF
A light start signal causes a xenon tube (not shown) to start emitting light,
The light emission stop signal from the terminal -p' (JFa)
Stops non-tube light emission. The switch (aS) is opened in conjunction with the release operation.
The release switch (CS) is closed when the winding is completed.
This is an accidental exposure prevention switch that opens when the output control operation is completed.
Ru. The signal from the release switch (KL8) is inverted.
One side of the AND circuit (AN o ) via the input terminal (IN3)
is input to the input terminal of the unintentional exposure prevention switch (cs
The signal from ) is sent via the inverter (IN4).
input to the other input terminal of the AND circuit (AN,,).
At the same time, p-com (input terminal (12) of il
° has been entered. Also, the output of the AND circuit (ANo)
The end is connected to the imprinted terminal (I) of μmcom (1).
It is. The output terminal (Ol) of μ-com (1) is exposed.
Becomes “High” when starting the output control operation.
terminal, and the release to which this terminal is connected to the input terminal.
The circuit (KL) controls exposure by this “High” signal.
Performs the release operation of the mechanism. Also, μmcom(1)
The output terminal (01) is the input terminal of the inverter (IN).
This is connected, and the output of this inverter (IN2) is
To the base of the power supply transistor (BTI) via a resistor
connected and the metering switch (MS) is set to 1 during exposure control operation.
The conduction state of this transistor (BTI) even if it is opened
It is designed to be maintained. μmcom (output end of 11
The child (02) is connected to the interface circuit (I P ).
“Hi” while reading data from the side (1).
This terminal (02) is connected to the inverter.
(INs). This invar
The output of the motor (INs) is connected to the power supply transistor via a resistor.
(BT2) is connected to the base. Therefore, the terminal (
02) becomes “High”, the inverter (INS)
The output becomes “Low” and the transistor (BT25 becomes conductive).
from the power line (-1#B) to the power line (1-
VL). Terminal on camera body side (JBI), terminal on lens side (JBI)
Power is supplied to the circuit on the lens (LE) side via LI) (2).
As camera accessories become more popular, as described below,
Data to start data transfer from to the camera body
Transfer start signal is sent from the camera body to the camera accessory.
Given. In addition, this μmcomll and the inverter (
INS) and the power supply transistor (BT2) to generate the start signal.
Output means are formed. The data output section (7) on the lens (LE) side
ROM (i(01)) in which seed data is fixedly stored
(described later) is included internally. The interface on the camera body side
Clock pulse output from the base circuit (l F )
(CPL) is the terminal on the camera body side (JB2), lens
Input to data output section (7) via side terminal (JL2)
The interface uses this clock pulse as a synchronization signal.
R between the interface circuit (IP) and the data output section (7)
The address signal and data signal of OM (HIJt) are
No. line (SB), terminal on the camera body side (JB3). , through the lens side end 'f (JLa)1. Deliver alternately
7 will be done. The block (9) surrounded by a broken line is up to the subject.
The lens side outputs variable data such as the distance of
Data regarding the movement l of the information output device from the reference position
This is a variable data output section that outputs the nearest
Corresponds to the distance from the shooting position to the subject [7 settings shooting position]
Output data on the amount of movement of the distance setting device a (not shown) to the location.
distance information output device (r)S) and the zoom lens.
Focus from the shortest focal length position to the set focal length position
A focus that outputs data on the amount of movement of a distance setting device (not shown).
A point distance information output device (FS) is provided. stop
The data from this image information output device (DS), (FS)
data is input to the data output section (7))tOM(ROI
) becomes the address specification data of ROM ((a)l)
The distance data (absolute value) set from and the set focus
Distance data (absolute value) is now output. Note that the distance information output device (DS) and focal length information output device
The position (FS) outputs the data of the number of refinement stages shown in Figure 2.
It is configured similarly to the device that powers the device. @Figure 4 shows the μmcom (11 sequential
This is a flowchart showing the operation, and the implementation of Fig. 1 is shown below.
This flow describes the data reading operation of an example camera system.
Explain based on the chart. In step 141, the measurement
The optical switch (MS) is closed and the input terminal (11)
It is determined whether or not the signal has become "High". Photometry
switch (MS) remains open and the input terminal (NO
When it is “Low”, move to step #2.
Then, perform step #3 or #4゜41-5.
・As for this operation (, will be explained later. Step #-1)
The photometry switch ('MS) is closed at the input terminal.
When it is determined that the child (11) has become “gh”,
Go to step #6 17 and set the timer register (T
Reset i(). Next, in step #7, μmco
Set the output terminal (02) of m(1) to “High” and input
Through the converter (INS), ]7 transistor (Br3)
conduct and open the power supply to the lens-side equivalents (71, (91).
At the same time, the interface circuit (IF)
Start the data import operation from the lens, and
Move to step 8. The detailed operation will be described later based on FIG.
The circuit on the lens side is supplied with the “High” level of the terminal (02).
Reset with the power-on reset signal output when power starts.
After that, the lens (LE) data is transferred to the camera body.
It is now ready to be sent to the other side. This is it
Connect the power supply terminal to the lens side and start the reading operation.
The terminal for the data transfer start signal is shared, reducing the number of terminals.
Less camera body and camera accessories
In addition to reducing the cost of
The reliability and durability of the connection terminals are praised. In step #8, μ-com (1) is the lens diameter.
All data are read to the interface circuit (IP).
μ-co is inserted from the interface circuit (IF)
The signal given to the input terminal (i3) of m(1) is “Hi”
Wait until it becomes "gh". During this time, the interface
from the ground circuit (IP) to the signal line (8B) and the terminal (JB2
). (JL2) In the tetator output section (7)
The address signal that specifies the address of M () (Os) is
is output in series, and then the corresponding address is output from the data output section (7).
The action based on the base is repeated. And Len
fixed data from the system to the interface circuit (IF).
Once the transfer is complete, the information output device (D
8) Data from (Fs) as address signal
The address of 1 (OM (111)) is specified and the settings are taken.
Distance information and setting focal length information are transferred from the lens to the camera body.
is serially transferred to the interface circuit (IP) of In this way, from the lens to the interface circuit (I
When all data transfer to F) is completed [7],
-Face circuit (IF) is the input terminal of μmcom (1)
When the terminal connected to (i3) is set to “High”
In both cases, the data reading operation of the lens is stopped. on the other hand
, μ-com (11 has input terminal (i3) set to High'')
When it is determined that the
Set the output terminal (02) to “Low” and connect the power supply transformer,
Make the resistor (Br3) non-conductive and connect the power supply line (-) to VL.
) to stop supplying power to the lens. Part 1, Te, #10
Move to the step and input terminal (i3) becomes “Low”.
wait for it to happen. Reception of data related to data loading of the following lenses shall be made by hand.
To summarize, first, from the camera body to the lens.
Address of ROM (HDt) of data output section (7)
Data specifying the address is sent, and the specified address is
The stored fixed data is sent from the lens to the camera body number.
These fixed data transfer operations are repeated.
When the setting information output section (9) on the lens side is completed,
The encoded setting information data output from
ROM(f(used as 0 address data,
The data reference stored in the specified address of
It is configured to be sent to the main unit. With this kind of configuration, there is a terminal that sends fixed data and a terminal that sends variable data.
The terminal that sends data (setting data) can be shared and the terminal can be connected easily.
The number can be reduced. The setting information output section (9) is the same as in Figure 2.
It is composed of various code plates, etc., and the relative position from the reference position is
Outputs coded data compatible with standard transfer equipment,
Based on this data, the ROM (HjJ)
Since the absolute value data is output [7], the absolute value data is
Compared to outputting data directly from the code board, the
The number of blocks required is small, and the area of the code board can be reduced.
. Furthermore, connect the camera body to the camera via the signal line (8B) [7].
Send the lens (LE) hair address data and then transfer the color from the lens.
When the data in the ROM ((a) 1) is sent back to the main body of the camera,
The structure is designed to perform such operations at different transfer timings.
address and lens data alternately.
Data is transferred in series, only one terminal is required, and the camera body and the recorder are connected.
The number of electrical contacts for signal transmission between lenses can be reduced. All data of the lens to the interface circuit (IP)
When the data import is completed, the interface circuit (IF
), set the terminal (ST) to “High” and perform 8-0 conversion.
A-D of the output from the photometric circuit (ME) by the meter (AD)
Perform the conversion. And the interface circuit (IF)
A-1) When the conversion is completed, A-1) Converter (AD)
Data Bv −Avo from , aperture value signal output device (
A8) Data from Avs - Avo, when waiting for ig
Data from the signal output device T8) between Tvs and 7.
Data Sv from the illumination sensitivity signal output device (88), and
and mode data from the mode signal output device (MS).
Read and connect to input terminal (i3) of μmcom (1)
Set the current edge to "Low". The input terminal (i3) becomes “Low” in step #10.
When it is determined that the
#l: Move to step 11 and install the interface circuit
(1F) sequentially transfer the data to μmcom (1)
Do the action of internalizing it. This operation is performed at the output terminal (o
data specifying which data to import from
The data specification signals are output sequentially, and the specified data
data is fetched from the data bus (DB).
repeat. and μmcam (interface to 11)
When all the data from #4 (IP) is imported
The process moves to step 1112. L/7X” (7) data is transferred to μmcom (1)
The process of
parallel data for each data
latched in the interface circuit (I F ) as
It will be done. Next, μ-com (data designation signal from 11
Accordingly, each data is processed in parallel in μ-com (within 11
Loaded. For example, if the ma is like this,
There is no data between the interface circuit (I P ) and the lens.
The data is serially connected using the data serial input terminal p.
Compared to [7], the overall cutting time is shorter when importing data.
Can be reduced. 4412 has an interface circuit (IF) from the lens.
Via (7) Among the data imported, the lens is attached.
Checks that will always be entered if the
It is determined whether or not data has been input. this
The check data is the first data sent from the lens.
The data is the same no matter which lens you use. When it is determined whether this check data has been input, μ
mcmm(1) moves to steps 1113 and below, and vice versa.
If this check data is not entered in the
Move to step. If check data is not entered
If the lens is not attached or
If there is an intermediate ring or bellows between the lens and the camera body,
This is the case when the camera accessory is installed. Now, if the check data is input (7), #13
The above data Av'o read from the lens in step
, ΔAvo = Avo −
Perform the calculation in (2) and calculate the open aperture value Avo of the lens.
put out Then, A-D conversion was performed in step #14.
Data Hv - Avo and calculated data Avo
So, (Bv − Avo) + Avo = By
-(Perform step 31 and step #15
Move to number one. In step #115, μmcom (loaded into 11)
Performs exposure calculation according to the data of the 4-output control mode
However, the contents of the exposure calculation in each mode will be explained below. Ma
Both the aperture value and exposure time are automatically adjusted based on the path light value Ev.
Approximately 6 program modes determined according to predetermined relationships
The calculation is performed and the exposure time is automatically controlled in aperture priority mode.
The calculation is carried out, and in the automatic aperture control mode with priority to the opening time.
The calculation for is performed, and the calculation for manual setting mode is performed. In addition, the above program. 4 automatic exposure control modes of fit priority and exposure time priority
The aperture value or sowing time calculated in
If so, the exposure time or aperture may be changed based on the limit value.
In addition, in flash photography mode, the maximum value of the flash light emitting device (FL)
Large luminescent light wrinkle, set with information output device (9) of lens (LE)
Shooting distance to the specified wave object, shutter of the camera body
Flash synchronization limit exposure time determined by mechanism (not shown)
Apex values corresponding to lv, Dv, Tvf respectively
Then, first, Ev-Tvf+α=Avft (α
>0) 1, -1-8, -9, = yes, 1. )”-(81
The calculation is performed and the exposure value E by TTL open average photometry is calculated.
aperture value based on v and flash synchronization limit exposure time Tvf
Avf1 and aperture based on large flash probability and shooting distance
The value Avf* is calculated. Next, the size of these aperture values
If Avf1'I Avfz, then Avft - Av. If the refinement stage value is Avfs > Avf2, then A
vfz-Av'. The refinement stage value of is calculated. The aperture is controlled according to one of these aperture step values.
However, the light emitted by the flashlight emitting device (PL) is limited to this
Based on a device that passes through a fixed aperture and reflects on the film surface.
It is controlled by the control device (FC) of the camera body. Here, the aperture value Avfs is determined by Ev and Tvf.
αEv (for example, IEv) is more than the appropriate aperture value.
The main focus is on the aperture value such as stopping down to a minute and synchronized shooting.
If the brightness of the subject is lower than the brightness of the sub-subject, the average
The exposure value bV according to the photometric value approximates the brightness of the secondary subject.
Therefore, the brightness difference between the main and sub subjects and the above α are controlled.
Goso [1 (1'c) causes the flash light emitting device (FL) to emit light.
The photoacid body is farther away than the main subject, and the flash light emitting device
is not given to the subordinate subject, but the aperture of αEv is
Exposure that is more or less close to the proper exposure is better than under exposure.
given to the subject. Furthermore, it fits during daytime synchronized shooting.
The value Avfl is thicker than Avfz (if rl, then Avf+
Control the walking stick [, then the main cover from the flash light emitting device (FL)
Insufficient light weight reaching the subject (2. Is it the main subject?
- Since it is exposure, the aperture is controlled based on Avfz.
The main subject can be properly exposed. Even 17 in any case
The main subject is controlled to have proper exposure. Furthermore, α's
The value does not necessarily have to be Xkiv, but can be determined as appropriate.
Ru. μmcom (1) after performing the itching motion more than '
Exposure control value and exposure control mode based on the calculation results in L.
, outputs display data such as warnings to the display section (1) P)-t.
Then, the process moves to step 41-19. On the other hand, check data from the attached lens (LE)
It is determined in step 112 that the has not been entered.
Then move on to step 4 and 17. This 4t17
The calculation operation in each step will be explained in detail below. First, the program
Ram mode, aperture priority exposure time automatic control mode, during exposure
Interval priority aperture automatic control mode, each 14g output control buried mode
is set, the shooting platform will automatically set the correct exposure.
1.The effective aperture value at this time is A.
If vn is the output of the photometric circuit (ME), then Bv - Avn. Therefore, (Bv −Avn) +Sv = Tv
= 191 itching and use this calculated value to determine the exposure time.
is controlled. On the other hand, output the value O as the number of refinement stages.
[7] Narrowing down is not performed. That is, 1” T L aperture
The falling time is automatically controlled using the built-in photometry method. On the other hand, in manual setting mode, the exposure time is set manually.
The number of refinement stages outputs a value of 0 [7].
No narrowing down is performed. Also, when in flash photography mode,
The exposure time is controlled by the flash sync limit value Tvf, and the aperture is
The number of stages including the output is 17, and the flashlight output is the film surface.
It is controlled by photometry and film sensitivity. and,
p-com (1) is displayed on the display section (D
Display data such as exposure control value, exposure control mode, warning, etc. to
Output data1. Then, proceed to step #19. In addition,
At this time, information about the aperture value of the lens is given to the camera body.
Since there is no aperture value, it is impossible to display the aperture value, and it is not possible to display the aperture value.
is not carried out. At the time of exposure in step #19! Data Tv for Taya control is
Exposure time control device (L:
l' ) and narrowed down in steps of 4t = 20
The data Av - Av'o for controlling the number of stages is output from the output terminal (
It is possible to transition from OP2) to narrow interrupt operation.
This means that the interrupt terminal (i) is used to receive interrupt signals.
It is to make this = T function. μmcom (11 is the star
The metering switch (MS) is closed at this time.
and the input terminal (il) is “mountain gh”.
is determined, repeat the operations #6 to #21 described above [
7. As long as the photometry switch (MS) is closed,
Repeat the action. On the other hand, when the operation of μmcom (1) returns to the start
The photometry switch (MS) is opened and the terminal (11) is
If it is “Low”, move to step #2 (7
If the value of the timer register (TR) is larger than the fixed value.
A determination is made as to whether or not the sound is getting louder. This value
If it is smaller than K, move to step #31. lever cash register
Star (Add 1 to the contents of TJ and move 1#7 Stella Play)
, read the data mentioned above, and perform calculation 2.
After that, repeat the operation in the order of #1-#2→#3→#7.
return. Then, in step 112, the timer register is
('r tt ) becomes larger than a constant value.
When it is determined, the display moves to step 114.
Part (1) P) shows +6 west [7 blank display]
data is output, and in step #5, the interrupt terminal (i
Stop receiving interrupt signals to t) [7 and #1]
Return to the step, and then close the photometry switch (MS) again.
+42 → #4 → #5 → #1 step movement until completed.
Repeat the work. To summarize the operation of μmcom (11), measurement, i-optical
Data cannot be read while the switch (MS) is closed.
repeat the operation of calculation 9 and display, and then open the metering switch.
Even if the timer register (Tl()) is
The contents (from 0 to +1) can be read in the same way.
repeat the operation of calculation 9 and display [7.
When the Ass) is released and a certain period of time has passed, the above operation will occur.
will no longer be carried out. Here, this certain period of time is, for example, 15
It is about seconds. The photometric switch (MS) is closed and the first performance [@
When the operation is completed, the interrupt terminal (i) is connected in step #21.
The reception of the interrupt signal to t) becomes -T function. So]
, Press the film winding is complete.
With the switch (C8) closed, press the release switch (1).
When (S) is closed, the output of the AND circuit (ANo) is
It becomes “High” and the interrupt terminal (interrupt signal
is input. At this time, immediately calculate the exposure control data.
is completed and the interrupt signal reception is now complete.
Therefore, perform the exposure control operation from step #22 onwards.
Shift to the next flow. This φ line is the exposure control data.
μ-c
om (Which step is 11 (however, #7, #1.2, 4.
Flow 5 is excluded because it is a non-interruptible flow.
It will be performed immediately even if you are performing the following actions. In addition,
This transition occurs when μmcom (11 receives the interrupt signal)
immediately jumps to a specific address and executes the command at that address.
It is done by doing. And μmcomQl is
First, set the terminal (02) to “Low” in step #22.
Interchangeable lens (t) with transistor (BTz) as cut-off
, E) and then input from the interchangeable lens (LE).
Stop data transfer to interface circuit (IF)
. To turn off the display (DP) in step 1i23,
Output the data for blank display in order to
Set the terminal (01) to “High” using the button and release the button.
The inverter (IN2) is operated at the same time as the inverter (IN2
The power supply transistor (BTI) is made conductive through the
Even if the photometry switch (MS) is opened after that, the corresponding
The conduction state of the transistor (BTI) is maintained by itself. Lely
When the zoom circuit (KL) operates, the exposure control mechanism (not shown)
operation is started. First, the narrowing down operation by the narrowing ring (13) starts.
[7] Compatible with the rotating acid of the aperture ring (13)
The number of pulses output from the pulse generator (PG)
The count value is narrowed down from the output terminal (OF2).
If it matches the data Av - Avo of the number of stages, the aperture control
The rotation of the aperture ring (13) is controlled by the control device (GA).
The aperture is stopped and the aperture is determined. At this time, the camera
For example, a single-lens reflex camera with a focal plane shutter
If the camera is
It is carried out once in a while. After the reflection mirror has finished rising, the aperture aperture opens.
is determined, the leading curtain (not shown) starts running.
Both output terminals (U
Exposure time count based on data from PI)
will be started. In flashlight mode, the shutter is fully open.
The flash light emitting device (FL) control device (FC)
The start signal is output from the terminal (JB6), and the flash light emitting device (
PL) receives this signal at the terminal (JF2) and starts emitting light.
Film surface photometry circuit (not shown) in the control device (FC)
When the integral value reaches a predetermined value, light is emitted from the terminal (JB7).
Outputs a stop signal [7] The flashlight emitting device (PL) is connected to the terminal (J
Upon receiving this signal from Fa), it stops emitting light. So I7
, counting exposure time regardless of exposure control mode
The value is the exposure time data value from the output terminal (opt)
When the start time control device (CT) reaches
Let it start. Then, when the second curtain completes its travel, unintentional exposure occurs.
The prevention switch (es) is opened and the reflecting mirror is lowered to F.
, the aperture stop El becomes fully open and the exposure operation ends. Upon completion of the exposure control operation, the accidental exposure prevention sui-nochi (
CS) is opened and connected to the input terminal (12)
When the output of the inverter (IN4) becomes “Low”, f
At step t26, the output terminal (01) becomes “Low”
As a result, the release circuit (RL) becomes inoperable and
, power supply transistor (BT's self-holding is released)
Interrupt to the interrupt terminal (it) in step #27
It is deemed impossible to receive the signal and the race returns to the start. So
At this time, the photometry switch (MS) continues to be closed.
If so, read the data and perform the calculation 1 display section again.
No, even if the photometric switch (MS) is not opened.
Read for a certain period of time and repeat the calculation 2 display operation. Also, if the accidental exposure prevention switch (C8) is opened,
So, if the photometry switch (MS) is turned on r4, the reading will be
calculation, calculation 9 display is performed, μ-com (11 is divided
Is the input signal receiver ready for installation?
Even if the battery switch (aS) is closed, the accidental exposure prevention switch
Since the switch (C8) is open, the AND circuit (A
The output of µ-COm(1) remains “Low” and
The θJ interrupt signal is not input manually to the interrupt terminal (it).
, μ-com (1) incorrectly performs exposure control/filling operation fr
It won't happen. Note that the film is still being wound even after the exposure control operation is completed.
17 has not been completed (when the accidental discharge prevention switch (CS)
) when the metering switch is opened, the reading will be taken immediately.
Even if you try to stop the calculation 1 display operation.
good. In this case, in step #41, the input terminal (i+
) is not “High”, the input terminal
(Step to determine whether ffl is “High”)
step is placed before step #2, and (12) is “High”.
”, move to step 12
However, if it is determined that it is LOW, the timer alarm will be activated.
Set *1 data in the register ('l”)t).
All you have to do is move on to step #2. At this time
, (TI()>K, so steps #4 and #5
The photometering switch (MS) is opened to perform the top operation.
Immediately after reading the data, operation 9 table will stop working.
will be stopped. The operation of μmcom (1) detailed above is explained by using an interrupt signal.
To summarize, the photometric switch (MS) is closed.
Data loading, calculation 9 display operation completed once and exposure
Interrupt signals are not received until all control data is collected.
is now ready to be attached, and from now on the release switch (R8) is
Immediately after the gate is closed, the exposure control operation is performed using an interrupt signal.
Start. Also, even if the photometry switch (MS) is opened,
Repeat loading and displaying pain 9 for a certain period of time, and then
Interrupt signals are still accepted during this period. stop
A certain amount of time has passed since the photometry switch (・MS) was opened.
Then, reading, calculation 9 display operation stops, and interrupt
The state is such that no signal reception is performed. Also, even if exposure control is completed, winding may not be completed.
In the state, reading and calculation 9 display are performed in the same way as above.
However, the output of the AND circuit (ANo) is the release switch (
)t8) remains “Low” even if it is closed, so an interrupt occurs.
No signal is generated and the μ-com (11 is for exposure control)
It does not start the operation. Since the system is as described above, μmcom
The data necessary for exposure control is not output from (1)
When the release switch (l(,S) is closed, μ
mcom (11 is in a state where it does not accept interrupt signals)
Therefore, the exposure control + full operation will not start and is inappropriate.
You will not be exposed. Also, μ-com (
The data necessary for exposure control is being output from 11.
When the release switch (aS) is closed at , μmco
m (11 is an interrupt signal no matter what operation is being performed.
The exposure control operation starts immediately depending on the signal, so the shutter
- Never miss an opportunity. Furthermore, the winding is completed
If the release switch (R8) is closed while the
Even if μ-can (no interrupt signal is input to 11)
Therefore, the exposure control mechanism (not shown) is not yet ready.
In this state, μ-com (1) starts operating for exposure control.
There are no malfunctions such as putting it away. As above, this
The system is activated by the μmcorn (1) interrupt signal.
function is connected to the start operation (release operation) of the camera's exposure control.
Camera exposure control using μmcom (1)
1 is very useful. In addition, the photometric switch (MS
) is closed, lens data is read repeatedly.
The data for exposure control is read, and the g appearance pain 9 display is performed.
For example, the shooting distance on the lens side can be changed.
Even if the data is changed, the changed data here
Calculations are performed based on, for example, pressing the setting ring.
Even if you move the camera quickly, the exposure will be incorrect.
No worries. Figure 5 shows the μ body of the interface circuit (IF) in Figure 1.
Internal circuit example, Figure 6 is the data on the lens (LE) side of Figure 1.
A specific circuit example of the output section (7), Fig. 7 shows the interface
Time chart at the beginning of the reading operation of the IP address circuit (IP)
Figure 8 shows the time chart at the end of the reading operation.
FIG. The circuit configuration shown in FIG. 5 and FIG. 6 will now be explained. First, in Fig. 6, each lens data is fixedly stored.
ROM(l(0) address allocation and 1.L
The meaning of each data is shown in Tables 3 and 4. (Hereafter, blank space) Fixed storage in ROM (Rot) based on Tables 3 and 4
We will explain the data that is being used. Please note that specific records
As an example of a lens, the focal length is 50 to 135118 and the aperture is
The values are shown for a zoom lens of F3.5 to F22. R
OM (Rot) address “oooo oooi”
Check data for detecting lens attachment”11
100" is memorized. Please note that the record that gave this specific example
This lens is compatible with any type of lens, not just lenses.
The address “00000001” contains this data “1110”
0” is stored.The check data is “1”.
It is not limited to 1100” and can be used with any data.
This data is common to all types of lenses.
That's fine. The address “00000010” has the above-mentioned maximum aperture value.
Av'o data is stored, but in this example it is not open.
Since the aperture value is F 3.5 (AV = 3.61)
One tap corresponding to F3 and 4 (AV=3.5) in Table 4.
I'00111" is stored.00000011
The data of the maximum aperture value AVm is stored in the address j.
In this example, F22 (Av=9) is shown in Table 4.
Data “10010” of F22 (AV=9) is stored.
has been done. The address “00000100” has the above
The data of the open aperture error △AVO is stored, and this
In the example above, the exact error is 0.11EV, but it is close to 1/8
Since they are similar, as shown in Table 4, △A vo = 1/
8 + The corresponding data “00001” is stored.
ing. Please note that the maximum aperture value is set in 0.5EV increments.
Table 5 shows data on AV'O and △AVO for lenses without
I'll keep it. Also, the maximum aperture value is set in 0.5EV increments.
Of course, AV'O is the maximum aperture value of the lens.
, and △AVO is 0 data “ooo
oo". Table 5 Address "00000101" contains the maximum zoom lens address.
The short focal length data /w is stored, and in this example
In this case, "0101" corresponding to 50IIIB shown in Table 4.
]" data is memorized. Note that the focal length is variable.
For fixed focal length lenses that are not
Distance data is stored at this address. ” 0
The address “0000110” is the maximum focus of the zoom lens.
Point distance data/1 is stored, and in this example,
is the data of “10001” corresponding to 135 attacks shown in Table 4.
data is memorized. In addition, in the case of fixed focal length lenses
data indicating that it is a fixed focal length lens''
11111” is stored.The above data is the lens
〇address “000100002” which is fixed data of
The range of ~”00011111” contains variable data.
Shooting distance data is stored. Shooting distance information output
From the device (DS), the distance ring (not shown) is infinitely distal.
4-bit data corresponding to the movement from the location is output.
, with this data, the lower order of r, ~ r0 of the address data
A 4-bit address is specified and written to the corresponding address.
The stored shooting distance (absolute value) data is output.
. In this example, the data “0010” from the block (DS)
When the data is output, the address @00010010” is specified.
The data of 2fn(I)V=2) stored there
The data “0110” is output and the data “1011” is output.
When you output it, the address "00011011" is specified.
Data of 9.5 m (Dv = 6.5)”101
01" is output. Note that the shooting distance data is
The apex system is the same as the aperture value because it is used for calculations for shadows.
When Dv changes in units of 0.5,
Data corresponding to the value of '751' is now output.
, but the data for the address from the block (DS) is
Increase the number of bits of the data and
By increasing the number of data bits, it is possible to
It is also possible to increase the range of data. Address 600100000"~"00101111
” indicates the focal length data set for a zoom lens.
is memorized and fixed for fixed focal length lenses.
The data “111111” indicates that it is a focal length lens.
All data are stored at the above address. Similarly to the shooting distance, the focal length information output device (FS)
) Minimum focus of the zoom ring (not shown) of the color zoom lens
4-bit data corresponding to the amount of movement from the point distance position
is output, and with this data the address data r3~
The address of the lower 4 bits of r0 is specified and stored there.
output the data of the focal length (absolute value)
It has become. In this example, from block (FS)
If the data is 60010''', the address is "00100"
010” is specified and the 50B data “01011” is
Output, "1010'" is address "001010"
10" is specified and 105M data I'10000"
data is output. Note that the focal length data here is
Frequently used such as 505m, 85m, 100m, etc.
only the focal length of the fixed focal length lens is obtained.
address data and focal length.
Increasing the number of data bits to achieve a finer focal length
It is also μ1 north to obtain data. Next, in the interface circuit (IF) of Fig. 5,
, as mentioned above, from the terminal (02) of μmcomfll to H
A data read start signal of “high” is output (7th
Figure 02), and the one-shot circuit (05
1), a “High” pulse is output (Fig. 7 O).
5+), flip-flop occurs at the falling edge of this pulse.
(FFI) is set. This flip-flop (
FFI) is the power output output from the OR circuit (ORI).
The pulse (P) from the reset circuit (PO2) (Fig. 1)
H1) or an AND circuit (AN6) described later. Reading interface circuit (IF) data from
Reset at the falling edge of the pulse (endl) indicating completion
be done. The Q output of the flip-flop (FFI) is
One input terminal of the D flip circuit (ANI) and the D flip
connected to the D input terminal of the drop (DPI), and the AND circuit
The other input terminal of (ANI) is connected to the oscillator (O5
The clock pulse output terminal (CP) of C) is connected.
Ru. The output terminal (CPL) of the AND circuit (ANI) is
The clock terminal (CL) of the lip flop (DPI) and
and terminal (JB2) on the lens side (JL2).
) to the lens (LE) through the clock pulse (CPL
). Therefore, D flip-flop (DP
I) After u flip-flop (FFI) is set
D input at the falling edge of the next clock pulse (CPL)
is taken in and the Q output is set to 'tt1gh' (Fig. 7 I
)Fl). This D flip-flop (1) Fl)
The Q output is the force r> y ta (CO+), (CO2), (α
)3) No reset terminal, decoder (DE2),
('DE3) is connected to the enable terminal of Q
When the output becomes “Highk”, the counter (■l), (
ω2), (■3) When the glue set state is canceled
Decoders (DE2) and (DE3) can output
state, and this interface circuit (IF) and lens
data can be exchanged with the system side. In addition, O
The output terminal of the circuit (ORI) is the flip clock (F
F3), (FF4), T) Flip-flop (DF
I) is also connected to the reset terminal of the flip-flop.
lop (FF3') and (FF4) are OR circuits (
ORI) is reset at the rising edge of the pulse from D
Flip Flon 7” (DPI) H pulse rising
It will be reset when you step down. On the other hand, in FIG. 6, as mentioned above, μcom in FIG.
(When pin 11 (02) becomes “High”, the transistor
The resistor (Br3) conducts and the terminals (JBI) and (J
Power is supplied from the camera body side to the lens side via LI).
will be started. This allows the power-on reset circuit (
PO3) operates and the output terminal of this circuit (PO3)
A flip-flop (F
F7), D flip-flop (DF5)
It is reset at the rising edge of the signal, and the set terminal is connected.
Flip-flop (FF5)
is set. Then, the AND circuit (ANI
) is input via terminals (JB2) and (JL2)
Flip occurs at the falling edge of the clock pulse (CPL).
・Q output (High”) of flop (FF5) is D free
D flip flop (DF5)
The Q output of the flop (DF5) becomes "High". This Q output terminal is used to reset the counter (■4) and (ω5).
Connected to the enable terminal of the decoder (DE4) and the enable terminal of the decoder (DE4).
and the counters (ω4) and (CO5) are reset.
The status is released and the decoder (DE4) is ready for output.
Ru. Here, the one-shot circuit (output from O8
The “High” pulse width is set by the power-on reset circuit (P
Longer than the “Highk” pulse width output from O3)
If you keep it, it will be the 7th lip flow in Figure 6. After the flip-flop (FF5) is set, the flip-flop shown in Figure 5
flop (FFI) is set, and this flip-flop
from the AND circuit (ANI) by setting the loop (FFI).
clock pulse is output, an AND circuit (AN
The falling edge of the first clock pulse (cPL) from I)
This ensures a D flip-flop (DF+). The Q output of (DE5) becomes “Highk” and the camera body
The reset state of the side and lens side circuits is released at the same time.
. Counter (ω1) and decoder (DE2) in FIG. The counter (ω4) and decoder (DE4) in Figure 6 are
The timing for synchronizing the camera body side and lens side.
This is a circuit that outputs a switching signal, and the counter (■1)
Lock pulse (CP), counter (■4) is clock
16 of 4 pits each to count pulses (CPL)
It is a forward counter. Decoder (DE2). (DE4) contains the counter (ωl) and the lower 3 bits of (■4).
Tsuto (CB2), (CBI), (CBO), (Cu2)
, (CLI), (CLO) are input and the lower 3 bits are
Output terminal (, TBi) ~ (TBO
), (TL7) ~ (TLo)
The state of this output is shown in Figures 7 and 8 as TBO (T
Lo)~TB? (TLt) and decoded in Table 6.
Relationship between input and output of (DE2) and (DE4)
Let me show you. Note that from now on, the terminals (TBo) and (TLo) will be
Higk” Ni fz timing (TBO), (T
LO') timing, (TBI). (TB
I), (TLt) timing, etc.
. Table 6 The counter (■2) in Figure 5 is the output terminal of the counter (■+)
Count the pulses output from the child (CB3) 4
The output (C) of this counter (ω2) is a bit counter.
53) ~ (C5O) and color/li (ωl) output (CB3
) is input to the decoder (DE3), and the decoder (DE
N) is the output of the counter (■2) and the output of the counter (ωl).
terminals (Sa) to (Sl7) depending on the force (CB3).
This decoder (DE3)
'Highk' signal output from this interface
Outputs the lens side hair address data from the bus circuit (IF).
and the step of reading lens data.
This becomes the step signal for the step, and the terminal (Sa) becomes “Hi” from then on.
gk" step (9), the terminal (SL) is "
The step of "lligk" is called step (Sl).
Each step is shown in DE3 in Figures 7 and 8.
Table 7 shows the relationship between the input and output of the decoder (DE3).
I will show you who is in charge. (Hereafter #white) Table 7 Decoder DE3 Human power output □ year - □□9 1 olo 000 00000000000000000
00001 0000000000000000001
0010 10000000000000000000
1100100000000000000000100
0001000000000000000010100
0010000000000000001100000
0.1000000000 000011100000
010000000 000010000000000
10 0000000010101000000001
0 0000 000101100000“00 00
1 00 000-001011 0 000 0 1
0000 0001100 00000 0 0 10
0 00011 1 00000 0 0010 00
01110000000000 0010 00011
111011111nnn nn AAAI A/%
In Figure 5, when one side of the AND circuit (AN7) is
The terminal (TB6) of the decoder (DE2) is connected to 4, etc.
The terminal (CP3) of the counter (■l) is input to the other input.
They are connected via a converter (INO). And Ann
The output of the code circuit (AN?) is the clock of the counter (ω3)
Connected to the input terminal (CL). This counter (α
) 3) is the address of the ROM (RO Emperor) on the lens side (Fig. 6)
3-bit counter used to specify response data
The output of these three pins is a shift register.
(SRI) input terminal (Ba3)l(Ba2)1(Ba
l) J is connected. This counter (ω3) is
When the output terminal (CP3) of the printer (ωI) is “1.Ow”
output from the output terminal (IT36) of the decoder (DE2).
Count the applied pulses and count the (T) of the (SO) step.
At the timing of B6) l'001'', (S2) step
At the timing of step (TB6), "010#," (S4)
"'011" at the timing of step (TBb),
(S6) At the timing of (TB6) in step
”, (SO) At the timing of step (TB6)
"101" + (510) steps of (, TB6)
It becomes "110" at timing. The shift register (SRI) in Figure 5 has an 8-pit input.
This is a foot register, and the output of the counter (■3) is connected to it.
Terminals other than (Ba3), (Baz), and (Bat)
Input terminals (Ba7) ~ (Bad), (Ha')
IfJ is connected to ground and always inputted.
. This shift register (SRI) has a switching terminal (sp
) is “High”, the clock to the clock terminal is
At the rising edge of the lock pulse (CP), connect the input terminal (
Capture data from (Bat) to (Baa) and switch
When the input to the terminal (SP) is low', it goes to the clock terminal.
The data captured at the rising edge of the clock pulse is
The bits are output serially to the output terminal (α terminal). Ann
One input terminal of the code circuit (AN2) and (AN3)
Both clock pulse (cp) terminals are connected in common.
, a decoder is connected to the other input terminal of the AND circuit (AN2).
(I) E2) output terminal (TB6) is connected and
A decoder (DE2) is connected to the other input terminal of the circuit (AN3).
) output terminal (TB7) is connected. And a
The output of the second circuit (AN2) is a flip-flop (FF
2) Connected to the cent terminal of the AND circuit (AN3)
The output is the reset terminal of the flip-flop (FF2)
Q output of this flip-flop (FF2)
The power is the switching terminal (SP) of the shift register (SRI)
It is connected to the. Therefore, flip-flop (FF
2) is the clock output at the timing of (TT36)
Set at the falling edge of pulse (CP), (TR?)
The rise of the clock pulse (CP) output at the timing of
It is reset at the falling edge (Figure 7, Figure 8 FF2)
O This causes the shift register (SRI') to
At the rising edge of the output terminal (TB7) of the reader (DE2),
Enter data in the columns and set the timings from (TBO) to (TB6).
Outputs data serially using To the set terminal of the flip-flop (FF3) in Figure 5.
is connected to the output (endz) of the AND circuit (AN15)
has been done. One input of this AND circuit (AN IS)
The output terminal (TB6) of the decoder (DE2) is connected to the output terminal.
4゜The other input terminal is the output of the decoder (DE3)
A terminal (512) is connected. Therefore, (S+2)
At the step timing (TB6) of (endz)
A pulse is output. This timing will be explained later.
, the timing when reading the fixed data of the lens is completed
, and from now on, the interface circuit (I) of the camera body
There is no need to output address data from F). Therefore, this (endz) pulse causes a flip
The flop (FF3) is sent and the Q output is “low”
”, and this “low” causes the O output to connect to one input terminal.
The output of the AND circuit (AN4) connected to
w'' and makes the switch circuit (SCI) non-conductive.The other input terminal of this AND circuit (AN4) has a counter.
The terminal (CP3) of the motor (ω1) is connected and the flip
The flop (FF3) receives the output from the OR circuit (OR+).
After resetting with a pulse, the above AND circuit (AN15)
Until it is set by the pulse (endz) from
The two terminals (CP3) are switched only during the “Hi Ik” period.
The shift register (SRI) becomes conductive and the shift register (SRI) becomes conductive.
) is transferred from the terminal (JB3) to (JL3
) is sent to the lens side circuit. One input terminal of the OR circuit (OR3) is connected to an inverter (
Terminal (CP3) of counter (■1) via IN6)
is connected, and the other input terminal is connected to the aforementioned flip-flop.
The Q output of the top (FF3) is connected. OR circuit (
The output of OR3,) is the control terminal of the switch circuit (SC2)
and one input terminal of the AND circuit (ANS).
It is. And the other input terminal of the AND circuit (ANS)
The output terminal (TBS) of the decoder (DE2) is connected to the child.
The output terminal of the AND circuit (ANS) is connected to the latch circuit (
0 switch connected to the latch terminal (L) of I, A')
The switch circuit (SCz) connects the terminal (JB3) and the shift register.
(SR2) is connected between the input terminal (IN) of
, this shift register (SR2) has a clock terminal (CL
) at the falling edge of the clock pulse (CP) input to
Synchronously, the signal given to the input terminal (IN) is sent to the terminal (
13bo) to (Bb4) in sequence. In addition,
The output of the circuit (OR3) is a flip-flop (FF
3) is in the reset state (i.e. reading data from the lens)
Reading fixed data after the loading starts
) and the output of the counter (COI)
During the period when the terminal (033) is Low', it becomes "lligh".
Then, the switch circuit (SC2) is made conductive and the shift register is switched on.
The lens data is loaded into the star (SR2). That is, the switch circuits (SCI) and (SC2) alternately conduct
It is designed so that conduction does not occur at the same time through the
By doing so, the signal line (SB) is equipped with a switch circuit (
SCI) is conducting, the address data is connected to the terminal (J
B3), shift on the camera body side via (JL3)
It is sent from the register (SRI) to the lens side circuit, and the switch
While the switch circuit (SC2) is conducting, the lens data is
From the lens side via terminals (JL3) and (JB3)
It is sent to the shift register (SR1) on the camera body side. The output terminal (Bb4) of this shift register (SR2) ~
(Bbo) is connected to the input terminal of the latch circuit (LA).
The latch circuit (LA) is connected to the output of the OR circuit (OR3).
Timing (TBS) when force is 'High'
Latch the output of the shift register (SR2) on the rising edge
. The output of the latch circuit (LA) is from the register (REGO) to (
REG7) input terminal, and these registers
Latch terminals (L) of stars (REGO)' to (REGi)
The outputs of the AND circuits (ANIG) to (AN17) are
are connected to each other. These AND circuits (AN 10
) to (ANI7) are both equipped with a decoder.
(DE2) output terminal (Tt36) is connected and
The other input terminals of the circuits (ANIG) to (ANI7) are
Output terminals (52), (S4), (
S6), (5B), (Sle), (Sle, (S13)
, (S+4) are connected to each other. Register (R
The input terminal of EG 11 ) is connected to the A-D converter (
The output terminal of AD) is the input terminal of the register (REG9)
is the output end of the set aperture value signal output device (As) shown in Figure 1.
The input terminal of the register (REG+o) has the setting exposure.
The output terminal of the time signal output device (TS) is the register (R
The input terminal of the EGII) has a setting film sensitivity signal output device.
The output terminal of the position (SS) is the output terminal of the register (REG 12).
The input terminal is the output of the mode signal output device (MS) shown in Figure 1.
power terminals are connected respectively. Also, the register (R
The latch terminals (L) of EG[l] to (REG12) are connected to
The output terminals of the control circuit (ANlg) to (AN22) are connected
has been done. These AND circuits (ANlg) ~ (AN, 22) and
One input terminal of (AN6) is connected to a decoder (DE).
The output terminal (S 17 ) of 3) is connected, and the AND circuit
(AN+8) ~ (AN22). The other input terminal of (AN6) is connected to the decoder (DE2).
Output terminals (TBe) to (TBe) are connected. So
The output terminal of the AND circuit (AN6) is connected to the interface
The data reading in the interface circuit (IF) has been completed.
It is a terminal (endl) that outputs a signal indicating
, which is connected to one input terminal of the OR circuit (ORI).
It is. Also, the output terminal of the AND circuit (AN+5) is
Indicates that fixed data has been read from the lens.
This is the terminal (end 2) that outputs the signal.
Connected to the set terminal of the lip flop (FF3)
There is. Furthermore, the output terminal of the AND circuit (AN17) is
A message indicating that all data in the file has been read.
The signal is output from the terminal (end3), and the flip
Connected to the set terminal of the flop (FF4)
. The Q output of this flip-flop (FF4) is shown in Figure 1.
p-cam (11 input terminal (13)
. The decoder (DE+) has p-co m (11 outputs
The terminal (OR3) is input, and this output terminal (OR
3) according to the 4-pit signal output from the output terminal (
Any one of aO) to (a12) is # i g
The input of this decoder (I)E + ) becomes 0 and
The output terminals (ao) to (all) of the 0 decoder (DEI) are shown in Table 8.
Each chip of register (REGO) to (REG12)
It is connected to the select terminal (CS) and the chip select
The register whose top terminal (C5) is “Highk” is
, outputs the data in that register to the data bus (DB)
Then, this data is taken into μmcom (1).
Decoder (1) E3) output terminal (515), (5
16) is connected to both input terminals of the OR circuit (OR2).
The output terminal (ST) of the OR circuit (OR2) is
It is connected to the A-D converter (AD) shown in the figure. This A-
As mentioned above, the terminal (ST) of the D converter CAD) is “Hi”.
A-D conversion is performed during the
Child (S+s), (516) is between 81gh#, i.e.
Tep (515). A/D conversion will be performed in (516). In Fig. 6, one input of the AND circuit (AN30)
The output terminal (CL3) of the counter (ω4) is connected to the terminal.
A flip-flop (FF7) is connected to the other input terminal.
) is connected to the 0 output (FD) of this AND circuit (AN
The output of 30) is connected to the control terminal of the switch circuit (SC3).
It is continued. □And this switch circuit (SC3) is
Terminal (JL3) and shift register (SR3) input terminal
is connected between. In addition, the shift register (SR
3) The clock input terminal (CL) is connected to the terminal (JL2).
These clock pulses (CPL) are input.
The shift register (SR3) is a switch circuit (SC3)
While conductive, connect the terminal (JB3) from the camera body side.
. (JL3)
The ends are sequentially synchronized with the falling edge of the clock pulse (CI) L).
I send it to children (Lao) to (La6). The AND circuit (AN31) has a shift register (SR3)
The output of the lower 3 bits (La2), (Lat), (La
o) is input, and these outputs are “11O”.
When the output of the AND circuit (AN31) becomes “High”
”.Same, the timing of this High is based on the camera book.
The final address data for fixed data is sent from the body.
corresponds to the point in time. One input of the AND circuit (AN3S)
The output of this AND circuit (AN31) is connected to the
A clock pulse (CPL) is input to the other input.
, this output is the set end of the flip-flop (FF7)
Connected to child. Therefore, this flip-flop
(FF?) is an AND circuit (AN) at the timing (TL7).
31) output is “Highk” (i.e. fixed
This is the final address for data).
Then, the Q output (FD) becomes “it;gh”, and the Q output (FD) becomes “it;gh”.
) becomes “Low”. One side of the AND circuit (AN32)
The input terminal of is the Q output of the flip-flop (FF7).
(FD) is connected, and the other input terminal is a decoder (D
The output terminal (TL6) of E4) is connected, and the AND circuit (
The output terminal of AN32) is the clock input of the counter (■5).
power terminal (CL). Therefore, the counter (
The outputs (Cab) and (Cao) of CO5 are flip-
Q output (FD) of flop (FF7) is “liigk”
Then, the timing (TL) of the next step (512)
6) 601n, the timing of the next step (513)
The output (Ca + ) of the counter (α) 5), (Ca
O) is the selection terminal (SL) of the data selector (MP) and the
Connected to the data input sections (C2) and (C3). day
The data input section (C1) of the data selector (MP) has a shift
Output (La6) of register (SR3) ~ (1, a o
) are connected. The topmost bit of the data input section (C2)
The bit is grounded, and the 2nd and 3rd bits from the highest
is the output of the counter (ω5) ((,a I), (Ca
O), but the lower four pits are equipped with a shooting distance information export device (D
The outputs of S) are connected to each other. Data input section (
The most significant bit of C3) is grounded, and the 2
The output terminal of the counter (CO5) is used for the 3rd and 3rd bits.
Child (Cat), (Cao) Ka, focus on the bottom four pits
The output of the distance information output device (FS) is connected
There is. This data selector (MP) has a selection terminal (S
L) Heno data ``oo'' / If it is, data input section
The data from (C1) is output, and if it is “01”, the data is
The data from the data input section (C2) is output, and at 10"
If so, the data from the data input section (C3) will be output.
. Therefore, the timing of (TL6) in step (512)
There are 7 registers from this data selector (MP) until
The data sent from the camera body via the star (SR3)
The address data is output, and (T
From the timing of step (S13) (TL6)
) until the timing of shooting from the data input section (C2)
Address data for distance is output, and 2 steps (513
) After the timing of (TL6), the data input section (C3
) address data for the focal length is output. The output terminal of the data selector (MP2) is the ROM (Rot
) address terminals (r7) to (ro), lower 7 bits
connected to the address terminals (r6) to (ro) of the
The top pit (r7) of the contact terminal is connected to ground.
There is. This ROM (ROI) is as explained in Table 3 above.
Each data is fixedly stored at a predetermined address.
By the data to the address terminals (r7) to (ro),
Data fixedly stored at the address specified by
is output to the output terminal. The output of this ROM (IN)
The output terminal is the input terminal (lb7) of the shift register (SR4).
) to ([, b3), and the remaining input terminals (Lb2
), (Lbl)l (LbO) is the ground connection level.
. This shift register (SR4), AND circuit (AN33)
). (AN3, flip-flop (FF6) is input as described above.
Shift register (SRI) on the camera body side in Figure 5
End circuit (AN2), (AN3), free
It has the same configuration as a pop-flop (FF2),
At the rising edge of the timing (TL?), the input/power terminal (
Import data from Lb7) to (lbo) and perform subsequent
At the rising edge of the timing, data is sequentially output from the upper bits in series.
output the data to the output terminal (OUT). One input terminal of the OR circuit (OR5) is
4) output terminal (Cl3) connects the inverter (INIO)
and the other input terminal has a flip-flop.
The Q output (FD) of the loop (FF?) is connected, and the output terminal is
It is connected to the control terminal of the switch circuit (SC4). The switch circuit (SC4) is a shift register (SR).
4) between the output terminal (α terminal) and the terminal (JL3)
It is being This OR circuit (OR5) and switch circuit
(SC4) and AND circuit (AN30) and switch circuit
(SC3), a flip-flop (F
F? ) while the Q output (FD) of
(when a fixed monitor transfer is being performed) and the counter
The period when the output terminal (Cl3) of the converter (ω4) is Highk'
Is there continuity between the switch circuit (SC3) and the camera body side?
It is manually operated via terminals (JB3) and (JL3).
Load the address data into the shift register and output it to the output terminal.
During the period when the child (Cl3) is “Low”, the switch circuit (SC
4) becomes conductive and the data from ROM (ROI)
Child (JL3). (JB3) and is sent to the camera body side. That is. Address data and fixed data from ROM (Rol)
will be input and output alternately. And flip
The Q output (FD) of the flop (FF7) is 81gh''.
The root switch circuit (SC4) remains conductive,
Shooting distance data and focal length data from ROM (ROI)
The data is connected to the camera via terminals (JL3) and (JB3).
Sent to the side of the body. Based on the time charts in Figures 7 and 8 below,
The operation of the circuit shown in FIG. 6 and FIG. 6 will be explained. First, u in Figure 1
-com (output terminal (O2) of 11 is “High”
” (Fig. 7 02) One-shot circuit (O8+)
From (Flip based on D pulse (Fig. 7 O5+)
The flop (FFI) is set and the next clock pulse
Q output of D flip-flop (DF+) at the rising edge of
The force becomes @Higk”, counter (ω1), (■2
). (ω3) is released from the reset state, and the decoder (DE2)
). (DE3) becomes ready for output. Also, flip
When the loop (FFI) is set, the AND circuit (A
A clock pulse (CPL) is output from (NI).
7CPL), this clock pulse (CPL) is the terminal
(JB2) and (JL2) to the lens side
It is sent to the circuit shown in Figure 6. On the other hand, μ-cam (1
1's output terminal (02) becomes Highk", the 1st output terminal (02) becomes
The power supply transistor (Br3) in the figure becomes conductive and the terminal (J
Power is started to be supplied to the lens side via B+) and (JL+).
Ru. When power supply from the terminal (Ll) starts, the power
A pulse is output from the on-reset circuit (PO3) and the D-flash
Rip flop (DF5), (DF6) are here.
It is reset at the rising edge of , and the flip-flop (F
FS) is set at this falling edge. and black
D flick occurs at the first falling edge of clock pulse (CPI, ).
The Q output of the flop (DF5) becomes “High”.
The reset status of the counters (■') and (COs) is resolved.
The decoder (DE4) becomes ready for output. Below
The preparation for starting the data input/output operation is completed. Next, in Figure 5, (TB6) of the (So) step
The counter (■3) becomes "001" at this timing.
The data of (TB7) timing shift register (
SRI) ◎And the next (Sl) step
At the rising timing of (TBO) to (TB7) of
Shift register (SRI) data “00000010
” is sequentially connected from the switch circuit (SCI) to the terminal (JB3)
, (JL3) are output in series. one
On the other hand, in Fig. 6, the switch circuit (SC3)
is conductive, so the clock pulse (CPL')
The above data is transferred to the shift register (
SR3) (Fig. 7 Lao, La+
, La2) o Data from this shift register (SR3)
The data is transferred to the ROM (Ro
t) address terminals (r6) to (ro).
Figure 7 SB, LaO, lad. La2), address specified from ROM (Rot)
Data is output. Shift register (SR3) in Figure 6
) outputs (La6) to (LaO) are (Sl) steps
The clock pulse rises at the timing of (TI, 6) of
The output becomes 0000001” (Fig. 7, 1a).
,o. Lal, La2), ROM (Rot) is “0000
The address 0001″′ is specified.
is the check data "111" as shown in Table 3 above.
00” is stored, and this data is stored in the ROM (Rot
) is output. This output is the timing of (TI, 7)
The signal is captured into the shift register (SR4) at the rising edge of the signal.
It will be done. Next (R2) step timing (TLO) ~ (T
In L7), the output terminal (Cl3) of the counter (■4) is "
l-ow' and the timing (TI, 0) ~ (TL
7), the shift register (SR4) terminal (
The data input in 1, b)) to (Lbo) are sequentially
From the switch circuit (SC4) to the terminal (JL3), (J
B3) to the camera body (SR in Figure 7). In Figure 5, data is sent from the lens (R
In step 2), the output (C84
) is Z, l)M+” and the switch circuit (SC2
) is conducting. Therefore, the terminals (JL3), (J
Check data input via B3) “11
100" (Figure 7 SB) has a switch circuit (SC2)
The shift lever is activated at the falling edge of the clock pulse (CP) via
It is incorporated into the register (SR2) (Fig. 7 Bbo~
Bb4). And timing (TB4) clock pulse
At the falling edge of the signal (CP), this shift register (SR2
) becomes “11100” (Fig. 7 Bbo -B
b4), AND circuit (AND) at the timing of (TBS)
) The rising edge of the pulse (Fig. 7 ANS) output from
The data from the shift register (SR2) is sent to the latch circuit.
(LA) Hellatched. Then, the tag of (TB6)
The pulse from the AND circuit (AN10) is
At the rising edge, data from the launch circuit (LA) is registered.
(REG J') (Fig. 7 AN1o
). (R2) AND circuit at step timing (TB6)
The counter is activated by outputting a pulse from (AN?).
(ω3) becomes “010” and the timing of (TB7)
And the shift register (SRI) has "oooo oiooo"
' data is imported. And step (R3)
When this happens, the output terminal (C84) of the counter (■1) becomes “H”.
igk", the switch circuit (SCI) becomes conductive, and
Furthermore, the output terminal (Cl3) of the counter (■4) in Figure 6 is
It becomes “Highk” and the switch circuit (SC3) becomes conductive.
Ru. By this, the shift register (S
The address data from RI) is transferred to the shift register in Figure 6.
(SR3) and passes through the data selector (MP).
to address terminals (r6) to (rO) of ROM (decoy 1)
Given. Then, at the rising edge of the timing (T), the ROM (
ROI) is stored at address “00000010”.
The data of the open aperture value Av'o is stored in the shift register (S
R4) is taken into 1. Here, the above Av'o data
In the example of Table 3, F 3.4 (Av'o = 3.
5) The data is "00111" corresponding to
. At step (S4), the terminal of the counter (ωl)
(C84), Color/Re (■4) terminal (CL3) Fi
Both become “L-OW” and switch circuit (SC2)
, (SC4) becomes conductive and the shift register is activated in the same way as above.
“00111” data from Star (SR4) is 7ft
Transferred to register (SR2), timing of (TBS)
This data is latched into the latch circuit (LA) by
Is it an AND circuit (ANll) at the timing of (TBS)?
register (REGI) with these pulses (Fig. 7 AN11)
The data of the open aperture value Av'o is taken in. Similarly, (S5) ``(river 00011
0” address data is sent to the lens and J (56)
The maximum aperture value Avm data is sent to the camera body by
register (REG2) at the timing of (TR6).
be taken in. (S7) Step “0000100”
0” address data is sent to the lens (S8
) step, open aperture error △AVO data is stored on the main body.
is sent to the register (REG3) at the timing of (TR6).
). (S9) Step "00001"
010'' address data is sent to the lens, and (St(
+) Steps send the data of the shortest focal length/W to the main unit.
1. At the timing of (TT36), the register (RE
000 in O(5++) steps taken into G4)
Address data of 01100″′ is sent to the lens, (
In step 512), the data for the longest focal length is transferred to the main body.
is sent to the register (REG) at the timing of (TR6).
5) Read fixed lens data with 0 or more captured in
Importing is completed. (S II > step, the timing (TR
6) At the falling edge of the clock pulse (CPL) in Figure 6.
The output (L”2) of the shift register (SR3) of
(La +), (Lao) is “110”
(Fig. 8 1aO, Lal, ja2), timing (Fig. 8 1aO, Lal, ja2)
TL7') is output from the AND circuit (AN35)
The flip-flop occurs at the rising edge of the clock pulse (CPL).
The drop (FF7) is set and the terminal (FD) is “ttl”.
gk”. (FD) becomes l1LOW”. This is my favorite, cow
The output state of the output terminal (CL3) of the
Regardless of the AND circuit (the output of AN3 is “Low”,
The output of the circuit (OR5) becomes “High” and each
The switch circuit (SC3) is disconnected and the switch circuit (S
C4) becomes conductive, and from then on, the lens data is transferred to the camera book.
It becomes a state where it is only sent to the body. In step (S12), the longest focal length data is transferred.
The signal (“I”) from the AND circuit (AN15) is
to the register (REG5) with the pulse at the timing of R6).
At the same time as the above data is imported, the AND circuit (
The pulse from the output terminal (end2) of AN
Rip-flop (FF3) is set (Fig. 8 AJ
'JI5end2 +FF3), then the counter (ω
1) regardless of the output state of the output terminal (CBI).
The output of the circuit (AN4) is "l-ow", OR circuit (OR
The output of 3) becomes “Highk” and the switch circuit (S
CI) becomes non-conductive and the switch circuit (SC2) becomes conductive.
. Therefore, from now on, all you have to do is import the lens data.
. At the timing (TL6) of step (S 12 ),
The counter (CO5) receives the output from the AND circuit (AN32).
count and the output becomes 01''. (Fig. 8 Ca
o , Ca + ) This allows the data selector (M
P) outputs the data from the data input section (C2).
, with this data, the address of the ROM (ROI) is specified.
It will be done. Note that the upper 4 bits of this data are stored in the counter (
■It is “OO01” which corresponds to the output of 5), and it is 1st place 4
The bits are 4 bits from the shooting distance signal output device (DS).
This is the data. This address area is shown in the example in Table 3.
As shown above, if the address is 00010000", 1
゜The data of “01010” does not indicate 4m, but the data is “00010”
001” indicates 1.7rIL @01011”
If the data is “oooi]110”, it indicates 16m.
The data of “11000” is “00011111”.
If so, data of "11111" indicating ω is stored respectively.
has been done. This shooting distance data (T)V) 11
to the shift register (SR4) at the timing of (TL7).
(513) Step timing (TBO)
) to (TR4) clock pulse (cp) falling
is taken into the shift register (SR2) in Fig. 5 (Fig.
8 Figure 13bo~Bb4), (TBS) timing
Latched in latch circuit (LA), (TR6) tie
Output pulse of AND circuit (ANI6) in mink (Fig. 8)
゛AN, 16) to enter the shooting distance in the register (REC6).
Data cannot be imported. At the timing (TL6) of step (S +4), the counter
The counter (ω5) is the pulse from the AND circuit (AN32)
As a total count, the output is 10j (Figure 8 Ca
o, Cat), data from the data selector (MP)
Data from the input section (α3) is output. By this
The upper 4 bits of the ROM (ROI) address are “(1
010", and the lower 4 bits are the focal length information output device.
The data is from (FS). The a
The focal length data is recorded on the dress as shown in Table 3.
In the example in Table 3, the address is 0010000.
0” indicates r501IllN stator “0101
1” is “00101010” then f l Q 5
The data “10000” indicating m is “001011
11", f135118 'i indicates data"10
001" are output from the ROM (lTh). This focal length data (/8) is obtained as (/8) in the same manner as described above.
Shift at the timing of (TL7) of step SI3)
The step of 9% (S14) is taken into the register (SR4).
It is connected to the launch circuit (LA) at the (TBS) timing of the drop.
Register (RE) is input at the timing of input fl, (TB6).
This data is taken into G7). At this time,
The output (end 3) of the circuit (ANI7) is a flip-flop.
Figure 8 AN17' to set the drop (FF4). end3. FF4), p-cam (11 input terminals
Send the “ytgh” signal to (13). μmcom (
11, as mentioned above, the input terminal (13) is “High”
This means that the lens data has been loaded.
, and set the output terminal (02) to low' to connect the lens.
Stop power supply to the side. OR circuit between steps (5+s) and (516)
The output (ST) of (OR2) becomes HJgh'' (Fig.
ST), during which time the A-D converter (AD) in FIG.
-Perform D conversion operation. and (51?) steps
From the AND circuit (ANIe) at the timing (TRI)
With pulses (Fig. 8 ANIs) A-D converter (AD
), the A-D converted data BV-AVO is stored in the register.
(REGs). (TB2) time
In the input circuit, the pulse from the AND circuit (ANI circuit (Fig. 8A)
N19) outputs the data from the aperture signal output device (As) shown in Figure 1.
The data Av-Av'o is stored in the register (REG q).
be included. At the timing of (TB3), the AND circuit (A
Figure 1 with the pulse from AN2G (Figure 8 AN2G)
The data Tvs from the exposure time signal output device (TS) of
Loaded into the register (REGIo). (1134)
At the timing of , the pulse from the AND circuit (AN21)
(Fig. 8 AN21) is the film sensitivity signal output device (s
The data SV from s) is stored in the register (REC, ++).
It gets absorbed. At the timing of (TBS), the AND circuit (
The mode signal is sent by the pulse from AN22) (Fig. 8 AN22).
The data from the signal output device (MS) is sent to the register (REGI).
2). And the timing of (TB6)
From the output (end l) of the AND circuit (AN6)
A pulse is output (Fig. 8 endl), and the rise of this pulse
Flip-flop on the rise (FF3)', (FF
4) Kari is set and flips on the falling edge, 70 tsubu
(FFI). The D flip-flop (DPI) is reset and the counter
(■l), (CO2), (ω3) are reset.
The decoder (DE2) (1)E3)
becomes unable to output. In addition, Flip Flip Flip (FF)
By setting 4), the input terminal of μmcam (1) becomes '1
．． The input terminal (13) of p-cam 11.1 is “1-ou”.
r”, the connection to the interface circuit (IF)
Determine when data loading is complete and interface
p from the interface circuit (IF) via the data bus (DB).
-com (1) Start reading data into. Ma
First, the data from the output terminal (OF2) of μmcom (1)
If the output terminal is “OH”, the output terminal of the decoder (DEI) (
, 0) becomes “Highk” and is sent from the register (REGO).
The check data is output to the data bus (DB), and this
The check data is read and connected to μ-com (11).
Next, when the data of (OF2) becomes lHn, the terminal (-1)
becomes “High” and the data in the register (REGI)
is read to μmcomll) via the data bus (DB).
be included. Register (REC3) ~ (
Data from REG 12) is transferred via the data bus (DB).
and sequentially μ-com (Read into It-In, Read into
When the process is completed, p
-com (11 performs the operation after +12 step
. (Yoshita #Yu) I have explained the above in detail.
The embodiment can be modified as follows. First, the aperture
Most of the control operations in the exposure time control section are performed using μmcom (
p -con (
11k configuration, reducing the number of external circuit components
can. Also, 13v -Av obtained on the camera body side
o, Avs −Av'o, '['vs, 5v. The mode data is passed through the interface circuit (IF).
directly into μmcom (ll).
and the interface circuit (IF) connects the data from the lens.
interface circuit.
(IF) to read the lens data and while on the right Avs -Av'o, Tvs, Sv
, read the mode zone^, then perform A-D conversion, and select the missing number A-D.
Read the converted data By-Avo. and in
Reading the lens data of the interface circuit (IF)-\
When the process is completed, start with the interface circuit (IF).
Read data from the next lens. In this way, you can read data into μmcom (11)
The processing time can be reduced compared to the previous embodiment. Also, the lens
Data reading is fixed data and variable data.
and read only the variable data from the second time onwards.
〇Now, in the above example, as a process for the transferred data,
This is about the case of performing exposure calculation, but data processing
The principle is not limited to exposure calculations, but also applies to addressing.
For example, data transferred from a camera accessory
It may also be displayed in the viewfinder of the camera. In addition, in the flowchart of FIG. 4 of this embodiment, 1
μmcom (1) is designed to operate constantly.
However, when μmcom (11) is operated all the time, the power
Power consumption is high and the power battery (BA) is quickly exhausted.
Therefore, select μmcom according to the functions of μmcom to be used.
The program is designed so that it does not operate when it is not necessary to do so.
You can also decide on a gram. This can be easily achieved by a person skilled in the art, so the specific μ
Let's take an example of mcom and explain the appropriate flow for that μmQOm.
- Showing charts (programs) will be omitted. Furthermore, in the above embodiment, as a camera accessory.
Although examples of interchangeable lenses are given in the above, the present invention is applicable to interchangeable lenses.
Data exchange between the camera and the camera body is limited to transfer.
In addition to camera accessories such as strobes and motors,
data pack, lens accessories
etc., when the accessory is installed, the calculation is performed on the camera body.
It is also possible to control the exposure control data that is issued.
In addition, the shift register for address data output shown in Figure 5
(SRI) and shift register for data output in Figure 6
(SR4) is shown in the time chart Figures 7 and 8.
Uni timing (TB?), (TL?) rise
Import the parallel data that has been input before, and then import the data in parallel.
The loaded data (TBO) ~ (TB?). At the rising edge of (TLO) to (TL?), the most significant bit is
Output from the original data. A shifter that performs such an operation
The register has the following circuit configuration. First of all
The data for each bit input to the column is preset.
Eight lip-flops are provided for each bit. and
, the output terminal of the flip-flop that corresponds to the lower bit
The flip whose child corresponds to the bit immediately above the lower pit
connected to the input terminal of the flop. By doing this
, is applied to each flip-flop in synchronization with the clock pulse.
The reset data is ordered from the lower bit to the upper bit.
Next, among the 8 flip-flops to be transferred,
Flip, in which the most significant bit data is preset.
The ninth 7-bit circuit has one more flop output terminal.
Connect to the input terminal of the flop. And this number 9
Connect the output terminal of the second flip-flop to the shift register.
Use as an output terminal. By doing this, the ninth flip
The flop is synchronized with the clock pulse and the data of the top pit is
Takes the output of the flip-flop where the data is preset.
data is delayed by exactly one clock pulse.
〇Effect As described above, the present invention provides a fixed record to the camera accessory.
The stored variable data is transferred to the camera body and processed.
In the camera system where processing is performed, data transfer is started.
A start signal that outputs a start signal to camera accessories.
The signal output means is used for data processing of the above-mentioned transferred data.
in conjunction with manual operating means operated for the purpose of
The data transfer start signal is repeated while the operation is being performed.
data is output, and the data is processed every time the data transfer is repeated.
I have configured the data reader so that it makes sense.
, every data change in camera accessories ~ as before
It is convenient because there is no need for repeated manual operations, and it is easy to use.
For each data change, the value associated with data processing (for example, transferred data
Data display values and calculation results) are updated, so they are always displayed properly.
The display and exposure are automatically obtained. In addition, manual operation is not performed.
During this period, the data transfer start signal is transmitted via the second terminal.
start signal to be given repeatedly to the camera accessory
Since the output means has been configured, the data change has been made.
Separate signal terminals, such as when transmitting information to the camera body.
By installing a separate signal terminal, there is no need to
Price increases and reliability deterioration can be prevented. Further, according to an embodiment of the present invention, when the manual operation is completed,
is also opened multiple times so that the data transfer start signal is output.
Since the start signal output means has been configured, manual operation on the camera body is now possible.
A method for specifying the shooting status of camera accessories by interrupting the shooting process.
(For example, shooting distance information output device of interchangeable lens, focal length
To obtain desired shooting conditions by operating information output devices, etc.)
While performing the operation, the above calculation result or transfer data is
For example, you can check the display in the camera's viewfinder, and the camera
Furthermore, according to another embodiment,
, share the power source between the camera body and camera accessories.
to supply power to camera accessories from the power supply of the camera body.
Configure the feed path as follows, and transfer data via this feed path.
Supply start signal from camera body to camera accessory
Since the power supply terminal and transfer start signal terminal
are shared between the camera body and camera accessories.
This reduces the number of terminals between the camera accessories and the camera accessories.
This eliminates the need for a power source, allowing for smaller camera accessories and
and lower prices.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the camera system according to the present invention, Fig. 2 is a circuit diagram showing a specific example of the apparatus (AS) shown in Fig. 1, Fig. 3 is an explanatory diagram thereof, and Fig. 4 is A flowchart diagram showing the overall operation of this embodiment, FIG. 5 is a circuit diagram showing a specific example of the circuit (IF) in FIG. 1, and FIG. 6 is a specific example of the data output section (7) in FIG. 1. The circuit diagrams, FIGS. 7 and 8 are time charts showing the operation timing of this embodiment. Rot: Fixed storage means, SR3, DS, FS, MP
Near address designation means, JL3: first terminal, JS: second terminal, IF I SC21SR21LA: reading means, MS: manual operation means, MS, INK: operation signal output means, 1, INS, l3T2: start signal Output means, LE: Interchangeable lens, DS: Shooting distance information output device, FS: Focal length information output device. Applicant Minolta Camera Co., Ltd. 1jJ3 Figure 4 Procedures Amendment 1. Indication of the case 1983 Patent Application No. 83459 2 Name of the invention Data reading device in camera system 3 Person making the amendment Relationship to the case Applicant Address 2-80 Azuchi-cho, Higashi-ku, Osaka City Osaka Kokusai Building Self-starter 1 6 West 1+, iF, Internal Medicine (1) l! II @H, I"'s 159 white; 1520 I1
1 to 10th White I J., 1st Moon) Delete "'Small source line...'" and (211) 1 ml of 51st mail and 61st V1, respectively. Please make the changes as shown in Figure 5 and Figure 6 of the attached sheet.

Claims (1)

[Scope of Claims] 1. Fixed storage means having a plurality of addresses and in which variable data to be used in the camera body is permanently stored in each address, and addressing means for specifying an address of the fixed storage means. , The data in the fixed storage means stored in the address designated by the address designation means is transferred to the camera body 1.
A camera accessory is provided with a first terminal for transferring data, and a second terminal to which a data transfer start signal for starting data transfer via the first terminal is input, and a first terminal of the camera accessory is provided. a reading means for reading data transferred via r; an assistance operation means operated to transfer data to the camera body and perform data processing; repeats the data transfer start signal toward the second terminal 17 at least while the operation signal is being output from the operation signal output means.
1. A data reading device for a camera system, characterized in that a camera main body is provided with a start signal output means for outputting. 2. Even if the manual operation is stopped and the operation signal output means no longer outputs the operation signal, the start signal output means
The data reading device according to claim 1, which outputs the data transfer start signal a plurality of times. 3. The camera accessory is an interchangeable lens, and the addressing means includes a photographing state specifying means for specifying a desired photographing state by setting photographing information of the interchangeable lens, and the address is designated by the means. A data reading device according to claim 1 or 2. 4. The data reading device according to claim 3, wherein the photographing state specifying means is an image distance information output device of an interchangeable lens. 5. The data reading device according to claim 3, wherein the photographing state specifying means is an interchangeable lens focal length information output device.