JPH0715557B2 - camera - Google Patents

Description

Detailed Description of the Invention

The present invention relates to a camera having an input / output terminal for facilitating diagnosis and adjustment of a complicated camera.

Since today's cameras have many functions and have many switch inputs, it is a difficult task to check for failures. Further, as one of the multifunctionalization, there is a camera having a so-called multi-photometric device which divides a screen by a plurality of light receiving elements to perform photometry to obtain an appropriate exposure value. The applicant has already applied for some cases. In such an apparatus, since the display in the viewfinder of the camera usually shows one value, it is difficult to adjust or check many photometric outputs.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to make it possible to read the state of switch input and the value of photometric output by using a dedicated adapter to facilitate the adjustment and diagnosis of the camera.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) is an example of division of a field scene screen of a multi-photometric device according to the present invention, which is a five-division screen composed of a central portion and four-divided peripheral portions. Figure 1 (b)
Is a modification of Fig. 1 (a), in which the sensitivity of the central part spreads to the lower part. Although there are various division methods, this five-division method keeps the balance between the circuit complexity and the effect of multi-photometry (Actual development 55-125623).

In order to explain the following embodiments, the central portion is Z ₀ , and the upper left, upper right, lower left, and lower right are Z ₁ ,
Let Z ₂ , Z ₃ , and Z ₄ .

FIG. 2 shows a photometric optical system. 1 is a taking lens, 2 is a quick return mirror, 3 is a film surface, and a shutter (not shown) is located in front of the film surface 3.
Reference numeral 4 indicates a finder screen, and 5 indicates a pentaprism. An eyepiece lens (not shown) guides the light emitted from the prism 5 to the eye of the photographer, and the photographing finger receives the light and can observe the field screen. 6, 7 and 8 are eyepieces (not shown)
There are one pair on both sides of each, 6 is a triangular prism, 7 is a condenser lens, and 8 is a silicon photodiode (hereinafter referred to as SPD). FIG. 3 is an SPD pattern for realizing the division of FIG. 1 (b). Z _{0 to} Z ₄ correspond to FIG. 1B, respectively, and the central portion Z ₀ connects the left and right SPDs in parallel. That is, a and a ', b and b'are connected.

FIG. 4 shows a specific configuration of the embodiment of the invention.

Numerals 100 to 104 are publicly known photometric circuits which generate photometric outputs corresponding to the central portion (Z ₀ ) and peripheral portions (Z _{1 to} Z ₄ ) of FIG. 1, respectively. The output of the photometric circuit 100 is connected to the comparator 110 by the semi-fixed resistor VR ₀ , and is pulled up by the constant current source I ₀ , so that the level shift corresponding to the voltage VR ₀ × I ₀ is performed. Reference lens (50 here)
By adjusting the semi-fixed VR ₀ to a predetermined output to the uniform luminance surface serving as a reference to attach the mmF1.4 lens), to obtain a photometric output PV ₀ for the central unit Z _0. Similarly, the semi-fixed resistor VR ₁ and the constant current source I ₁ , ...
, And the photometric outputs PV _{1 to} PV ₄ for the peripheral portions Z _{1 to} Z ₄ are obtained by adjusting the semi-fixed resistance VR ₄ and the constant current source I ₄ , respectively. As described above, when the reference lens is attached, VR ₀ to VR ₄ are adjusted so that the photometric outputs become equal to the uniform luminance surface.

As described with reference to FIG. 3, SPDs corresponding to the central portions of the left and right SPDs are connected in parallel to the photometric circuit 100.

The potentiometers 105 to 108 serve as setting means for film sensitivity information, shutter speed information, set narrowing down stage number information, and open aperture value information, respectively. 1
Reference numerals 10 to 118 are comparators for successive approximation, and
0 is a multiplexer, 121 is a D / A converter, and 122 is a microcomputer unit (hereinafter MC
U. ).

The multiplexer 120 is a well-known circuit that receives the 4-bit P port output 0 to $ F of the MCU 122, selects one corresponding 16 signals input to the multiplexer 120, and transmits the selected signal to the OUT terminal. is there. D / A
The converter 121 has a 7-bit configuration, and R ₆ of the MCU 122 is used.
To R ₀ terminal of Z ⁶ to Z ⁰ is controlled by the terminal, it is of known for generating an analog amount of 128 levels from 0 to 127.

The MCU 122 is a known one which is currently commercially available. Here, a 4-bit one-chip microcomputer MB8851 manufactured by Fujitsu will be described as an example.

Comparator 11 selected via multiplexer 120 by the P port output of MCU 120
0 to 118, D / A converter 121 and MCU
Sequential comparison A / D conversion is performed by 122. Table 1 summarizes the information that is A / D converted by these and input to the MCU 122.

[Table 1]

The switch SW ₀ is a switch that is turned off when the camera is normally used and is turned on during inspection.

The switches SW ₁ and SW ₂ are ON and O in Table 2 according to the P, S, A and M modes of the mode select dial.
Do FF. The P mode is a so-called program mode in which the camera determines the aperture value and the shutter speed according to the brightness value of the subject if only the film sensitivity is set, and the S mode is the so-called shutter speed priority in which the camera determines the aperture value when the shutter speed is set. On the contrary, the A mode is a so-called aperture priority system mode in which the camera determines the shutter speed when the aperture value is set. And in M mode, the aperture value and shutter speed are determined while looking at the display.
This is the so-called manual mode. Switch SW ₃ ~
The operation of SW ₆ is summarized in Tables 3-5.

[Table 2]

[Table 3]

[Table 4]

[Table 5]

The resistor 125 and the capacitor 126 are the MCU 1
22 is connected to the RESET terminal and resets the MCU 122 when the power of the camera is turned on. The oscillator 128 generates a reference clock of the MCU 122 by the capacitors 127 and 129 and the oscillation circuit inside the MCU 122. Switch SW ₇ is a release switch and MCU 122
It is connected to the IRQ terminal of and the MCU 122 is interrupted at the time of release.

Tr ₁ is turned on when the R ₁₄ terminal of the MCU becomes L, energizes the narrowing stop magnet 131, and stops the narrowing operation after the release. Switch S
W ₈ is a narrowing-down start switch, which is normally ON and is OFF when the diaphragm starts to open after release. The switch SW ₉ is a mirror switch, which is normally ON, is OFF immediately before the mirror is raised, and is ON after the mirror is lowered. The switch SW ₁₀ is a trigger switch that is normally turned on and turned off when the front curtain of the shutter starts to open.

Reference numeral 124 denotes a shutter control circuit for controlling the shutter speed of 1/4000 seconds according to the values of R _{13 to} R ₇ of the MCU 122.

Shutter control is performed in the following sequence. When the switch SW ₉ is switched from ON to OFF with the mirror up after the release, the transistor Tr is energized, and the rear curtain locking magnet 132 of the shutter is energized and excited to lock the rear curtain instead of locking the mechanical system. . When the trigger switch SW ₁₀ turns from ON to OFF, the MCU 122
After a predetermined shutter speed set by the terminals R _{13 to} R ₇ has passed, the transistor Tr ₂ is turned off, the power supply to the rear curtain locking magnet 132 is released, the rear curtain is started, and the shutter is moved to the predetermined shutter speed. It is controlled by the shutter speed.

FIG. 5 shows the control of the diaphragm, in which the horizontal axis represents time and the vertical axis represents the change in the number of narrowing stages. If the lens has a diaphragm control, it changes linearly as shown in the figure, so t
After the shutter is released at ₀ , if the predetermined time t _s is set from the time point t ₁ when the diaphragm starts the narrowing operation, the number of narrowing stages to be controlled AV _S -AV _O can be controlled. Where AV _S
Is the controlled aperture value and AV _O is the open aperture value.

FIG. 6 shows the structure of the display circuit 123 of FIG. Since the exposure display is performed in the viewfinder by the LCD (liquid crystal) having the configuration shown in FIG. 7, the output stage is composed of exclusive ORs 151 to 176. An oscillating circuit 145 drives the common electrode COM. 144 is a decoder circuit that realizes the display of Table 3. Inverters 141-14
3 outputs H output when 0 _{7 to} 0 ₅ are L respectively. The outputs of the exclusive ORs 151 to 153 are opposite in phase to the COM terminal. Then, "M" or "+" or "-" shown in FIG. 7 is displayed. Further, when the output of the exclusive ORs 154 to 176 and the output of the COM terminal are in opposite phases by the decoder 144, the selected segment among the seven segments in FIG. 7 is colored,
The display is as shown in Table 6. Since all the outputs of the MCU 122 at the time of reset are H, it is determined that all the displays in FIG. 7 are in the display erasing state when 0 _{7 to} 0 ₀ are all H.

[Table 6]

FIG. 8 shows the internal structure of the MCU 122. R in which an instruction for the arithmetic unit ALU or MCU is written
OM, program counter PC for designating addresses of ROM, instruction decoder DEC for translating instructions of ROM, control-lossic section CL for executing translated instructions, RAM functioning as data memory designated by X, Y, oscillation A circuit OSC, an internal timer T, output dedicated ports P and O, an input dedicated port, an input / output port R, a serial buffer SB, and a serial port C are included. A part of the RAM is used as shown in Table 7, which will be described in detail later.

In FIG. 4, the inspection tool 200 is an MCU1.
22 is connected to the R ₁₅ , SI, SO and SC / TO terminals. When using the inspection tool, switch SW ₀ is turned on. The inspection tool 200 performs various operations by serially inputting the numerical values of $ O to $ F shown in Table 8 from the SI terminal to the serial buffer SB shown in FIG. 8 in synchronization with the clock of the SC / TO terminal. Can be done. As one of them, the contents of the internal data memory RAM can be read from the SO terminal in synchronization with the clock of the SC / TO terminal. The R ₁₅ terminal becomes L during reading and serves to adjust the timing. The contents of Table 8 will be described later.

[Table 7]

[Table 8]

FIG. 9A shows a configuration for setting the serial input, and shows a time chart of the SI input signal input and the SO output signal output in synchronization with the synchronization signal SC / TO. This shows the operation of serial input. A synchronizing signal SC / TO is generated by an internal clock according to an instruction from the MCU 122. This clock causes the contents of the 4-bit register of the inspection tool 200 to be S
L to 4-bit serial buffer SB via I terminal
Transferred from SB. 4 in the inspection tool 200 register
The switch that has the SI input of $ 0 to $ F set by the switch is transferred. By turning on the inspection switch SW ₀ (FIG. 4), the data can be read into the MCU 122.

FIG. 10 is a flow chart showing the operation of the MCU 122. By setting the P port to $ F, the switch SW ₀ of the F terminal of the multiplexer 120
The ON and OFF states of can be read from the K ₀ terminal of the MCU 122.

When using a normal camera, the switch SW ₀
Is never turned on, the K ₀ terminal goes high, and M is used as a data memory for setting the serial input SI.
Set $ F to [7, A]. Where M [7, A]
Is specified by X register 7 and Y register $ A 4
Indicates a bit data memory.

On the other hand, when the camera SW is adjusted or inspected, the switch SW ₀ is turned on, so that the K ₀ terminal becomes L.
At this time, as described in the explanation of FIG.
The SI input set by 0 is taken in. The fetching operation is shown below by the instruction code of the MB8851 manufactured by Fujitsu used in the embodiment. The LXI instruction that sets the X register of the data memory sets 7, the LYI instruction that sets the Y register sets $ A, and the EN instruction sets it to $ 20. Is started. The TSTS instruction checks whether the serial buffer full / empty flag (SF) is 1. SIN is a label that jumps to SIN until a pulse of 4 clocks is sent from the SC / TO terminal. When a 4-clock pulse is sent, the 4-bit information transferred to the serial buffer SB (FIG. 9) by the STS instruction is transferred to the data memory M.
Store in [7, A].

Next, it is checked which one of Table 8 is to be checked. If M [7, A] = 0, it is a mode in which all the contents of the data memory RAM are read out, so that the normal sequence is directly entered. However, since 0 is stored in M [7, A], unlike the normal case of $ F, the RAM data is output after the sequence of the camera is completed.

When M [7, A] = 0 does not hold, M
Check if [7, A] = $ F. M [7,
When A] = $ F is established, if $ 0E is set to the 0 _{7 to} 0 ₀ terminal of the MCU 122, the display circuit 123 displays 0 _{7 to} 0
_Since all ₅ terminals are L, " ^-+ M" is displayed and 0 ₄
To 0 ₀ pin "D1110B" (B indicates a binary number) to display "88.80" as shown in next Table 6, so that the entire pattern of FIG. 7 is displayed. For this reason, it becomes possible to check the appearance and contact of the LCD. SI
To set the input to $ F, all that is required is to set the SI terminal to OPEN, and all the points x _T can be checked by simply turning on the switch SW ₀ without connecting the tool 200. When M [7, A] = $ E is satisfied, the display circuit 123 is set by setting $ AD to the 0 _{7 to} 0 ₀ terminals.
Can be displayed as " ⁺ 0". This is L
The pattern displayed on the CD is photographed by a TV camera and used as a positioning mark for pattern recognition. Since the left and right ends of the pattern of FIG. 7 are displayed, the accuracy can be improved. M [7, A] =
When $ E does not hold, M [7, A] is between $ 1 and $ D. By adding 2 and setting M [7, A] ← M [7, A] +2, the value of M (7, A] becomes $ 3 to $ F. By multiplying by 6 and outputting from the R _{6 to} R ₀ terminals, that is, by setting R _{6 to} R ₀ ← M [7, A] × 6, as shown in Table 8, the R _{6 to} R ₀ terminals are The values of $ 12, $ 18, ..., $ 54, $ 5A are set to the value of 50mmF which is the reference lens shown in Table 1.
1.4 A / D converted values of photometric output when a lens is attached are LV3, LV4, ..., LV14, LV15 (ASA
/ ISO100). The photometric output is adjusted by adjusting the semi-fixed VR ₀ to VR ₄ to shift the level. When the reference lens is attached and the uniform luminance surface is measured, the potential of each of the non-inverting input terminals of the comparators 110 to 114 can be set to a constant value by setting the potential to a predetermined value.
Since ~ 114 has an offset amount, it becomes an error amount when the comparison output with the output of the D / A converter input to the inverting input terminal is generated. On the other hand, when the output of the D / A converter 121 is fixed and the uniform luminance surface is measured by the reference lens, the semi-fixed VR _{0 to} VR ₄ are adjusted by the comparator 110.
If it is adjusted to the inversion position of ~ 114, the influence of the offset is canceled, and the adjustment accuracy can be improved.

When the switch SW ₀ is turned on to enter the inspection mode and the SI input is $ 1 to $ F, the output of the O port or the R port is set, and then the K ₀ terminal is monitored again for inspection. Check if the mode.
The state is maintained during the inspection switch SW ₀ , and when the switch SW ₀ is turned off, the state returns to the start position.

6 is a flowchart showing a normal exposure calculation operation of the camera from the input of set values. Although the input of the set value will be described in detail later, the switches SW ₁ to SW ₆ for inputting across the multiplexer 120, the photometric circuits 100 to 10
4. A part for writing the A / D converted values of the setting means 115 to 118 in the RAM.

Next, it is checked whether or not the multi-metering mode is set by the 2 ³ digit of M [6, 9] shown in FIG. M
If 2 ^{3 of} [6, 9] is 0, the center-weighted photometry mode is set, and if 1 is set, the multi-photometry mode is set. In the case of center-weighted photometry, the brightness value [BV ₀ ] _{H, L} is calculated based on the photometric output [PV ₀ ] _{H, L} at the center, and this value is [BV _ans ] _{H, L}
Is used in the following apex operation. On the other hand, multi-photometry means a plurality of (five in the embodiment) photometric outputs [PV
₀ ] _{H, L} , [PV ₁ ] _{H, L} , ..., [PV ₄ ] _{H, L} is a system for calculating and controlling the proper exposure. The photometric output is converted into a luminance value by correcting various effects of the lens such as bignetting, and is converted into a luminance value, respectively, [BV ₀ ] _{H, L} , [BV ₁ ] _{H, L} ..., [BV ₄ ] _{H, L}
Becomes Next, after calculating the maximum brightness value [MAX] _{H, L} , average brightness value [MEAN] _{H, L} , minimum brightness value [MIN] _{H, L} , brightness difference [ΔBV] _{H, L,} etc. [BV
_ans ] _{H, L} is calculated. These processes are described in JP-A-56-74226 and JP-A-55-114 by the present applicants.
No. 916, JP-A-57-42026 and the like.

Next, in the apex operation routine, the display value [DV] _{H, L} , R _{13 to} R output to the O port by the brightness value [BV _ans ] _{H, L} obtained by the center-weighted photometry or multi-photometry. A shutter speed value [TV _S ] _{H, L} for controlling the shutter is output to ₇ and a timing [t _S ] _{H, L} for controlling the aperture is calculated, and each output port is set.

Although the normal camera flow ends here, if M [7, A] = 0 is checked and this expression holds, it is the RAM data read mode.
In synchronization with the clock of the SC / TO terminal from the S ₀ terminal, the contents of 128 words of RAM data 8 × 16 in Table 4 are all output.

As a result, ON-O of each input SW
It is possible to easily check whether the FF check, the metering output adjustment level, and the set value of the setting means are correct. After the RAM data has been ejected, it returns to the start position and repeats from the input of the set value. Therefore, the semi-fixed VR ₀ -VR ₄ can be changed to adjust the photometric output. It is possible to check whether the value is changed or a predetermined value is reached by moving the shutter dial, film sensitivity, aperture interlocking ring or interlocking lever for the open aperture value.

Since $ F is set in M [7, A] in the normal case, the RAM data is not ejected, so that the waste of time required for the RAM data ejection can be omitted.

FIG. 11 is a flowchart of the interrupt process after the shutter button is pressed and the release SW ₇ is turned on. Wait until the interrupt terminal 1RQ of the MCU 122 becomes L and the λy and K ₂ terminals become H in the interrupt processing routine. Waiting for the time point t ₁ in FIG. The operation of the mechanical system is performed by a member that interlocks with the shutter button. When the narrowing-down start switch SW ₈ is turned off, the internal timer of the MCU 122 is started and waits until t = t ₁ + t ₃ . Next, the R ₁₄ terminal is changed from H → L → H, and the transistor Tr is energized during the period L to energize the narrowing stop magnet 131 to stop the diaphragm at a predetermined number of narrowing stages AV _S −AV _O. After this, the MCU 122 has a K ₁ terminal of H →
Only wait for L. When the mechanical system release sequence is completed and the mirror switch SW ₉ is turned on after the mirror is down, the K ₁ terminal becomes L and the release sequence is completed.

On the other hand, the shutter control circuit 123 controls to the predetermined shutter speed set at the terminals R _{13 to} R _{7 of the} MCU 123 after the mirror is raised as described above.

FIG. 12 shows a subroutine for inputting set values. Set the output of the P port shown in FIG.
When the Y register of M is set to 8 and A / D conversion processing is performed, the output of the comparator 118 designated by 8 of the P port is input to the K ₉ terminal of the MCU 122 via the multiplexer 120. Therefore, the D / A converter 121, the comparator 118 and the MCU 122 are used for successive approximation A / D.
The conversion is performed, the open aperture value signal AV _O of the setting means 108 is A / D converted, and the lower 4 bits (=
[AV _O ] _L ) is stored in M [7, 8], and the upper bits (labeled [AV _O ] _H ) are stored in M [6, 8]. [AV _O ] _{H, L} has a maximum value of $ 2A as shown in Table 1.
Since ($ indicates a hexadecimal number), [AV _O ] _H actually contains only 2-bit information. Then P port and Y
By reducing the number of registers by one, the same processing is performed until Y = $ F. Therefore, M [6,7] and M [7,
Set 7] refinement stage information [AV _M -AV _{O] H,} L M
[6, 6] and M [7, 6] set shutter speed information [T
Film speed information [SV] _{H, L} is stored in V _M ] _{H, L} , and in M [6,5] and M [7,5].

Further, the photometric output [PV ₄ ] _{H, L} is M [6,
4], stored in M [7,4], and so on [P]
V ₃ ] _{H, L} , ..., [PV ₀ ] _{H, L} up to M [6,
3], M [7,3], ..., [6,0], [7,0].

FIG. 13 shows details of the A / D conversion subroutine in FIG. Set “1000000” to the output ports R _{6 to} R ₀ of the MCU 122 shown in FIG.
The / A converter 121 is caused to generate an analog quantity corresponding to 2 ⁶ = 64. This is an intermediate value of the total variation 127.

Next, M [6, Y] and M [7, Y] are cleared and the input of the K ₀ terminal is monitored. If K ₀ = H, the analog quantity to be measured is larger than 2 ⁶ because the output of the comparator designated by the P port is 1, so the upper 4
Set 1 to the 2 ² digit of M [6, Y] that stores the bit. On the contrary, if the output of the comparator is small, the R ₆ terminal is reset and the memory M [6, Y] is left as it is.
_{The 5} terminals are set to H, the 2 ⁵ digits of the D / A converter 121 are set to 1, and the same comparison is sequentially performed on the lower bits to perform 7-bit successive approximation A / D conversion. FIG. 14 is a part following the set value input subroutine. Switches SW ₁ and S
When both W ₂ are ON, it is in the P mode, and as a memory for storing the mode information, as shown in FIG.
9] stores “1100B” (B indicates a binary number). The digit of 2 ³ becomes a flag to check whether it is the multi-photometry described in FIG.
By setting, the multi-metering mode is set at the same time.

When the switch SW ₁ is ON and the switch SW ₂ is OFF, the S mode is selected, so that M [6, 9] is set to "101.
0B ”is stored. When both the switches SW ₁ and SW ₂ are OFF, the M mode [6, 9] is set to “1001” in the A mode.
Store "B". Both are set to multi-metering mode. On the other hand, when the switch SW ₁ is OFF, the switch SW
_{When [2]} is in M mode, M [6,9] = 0000B
As a result, the center-weighted photometry mode is set by setting the multi-photometry flag of the 2 ³ digit to 0. This is because the M mode is a mode in which the photographer's intention is reflected, so that the camera does not perform the multi-photometry calculation process for determining the exposure. Then check the ON-OFF of the switch SW _3, the switch SW ₃ center-weighted metering is selected and O
When it is N, the multi-metering mode is reset by setting M [6, 9] ₃ to 0.

Next, if the switch SW ₄ is ON, 0 is stored in M [7, 9] as a lens having no focal length signal belonging to the group 1 or 2 described above.

Then, according to the switches SW ₅ and SW ₆ , the telephoto lens, the state with the teleconverter and the wide-angle lens are separated. The 2 ³ digit of M [7,9] shown in FIG. 16 is for setting the high speed program mode shown in FIG. 17 in the state where the program mode is selected.

FIG. 17 is a P-mode program diagram. The vertical axis represents the aperture value and the horizontal axis represents the shutter speed. The standard program diagram of A is the one when the F1.4 lens with a fixed focal length or less is preset and used for F16, and the high speed program diagram of B is the case where the teleconverter is attached to the F1.4 lens. Correspond.

FIG. 18 shows a flow of the subroutine of the apex operation shown in FIG. The memories [SV] _{H and L} corresponding to the apex value SV of the film speed shown in Table 4 are transferred to M [4,5] and M [5,5] of the table, respectively.
When the memory [BV] corresponding to the brightness value BV is added to this, M [4,5] and M [5,5] become memory [LV] corresponding to the LV (Light Value) value. That is, [LV] ← [SV] [LV] ← [LV] + [SV] ∴LV = BV + SV. As shown in Table 1, SV and (BV-AV ₀ ) are 1
The correct apex cannot be obtained by simply multiplying it by / 6. Therefore, correction is made by [LV] ← [LV] − $ 24.

Next, a memory M showing the mode information of Table 7
The mode is determined according to [6, 9], and the processing of each mode is performed. In the M mode as shown in FIGS. 14 and 15, M [6, 9] _{0 to} M [6, 9] ₃ are all 0, that is, M [6, 9] = 0, and as shown in FIG. Perform a mode calculation routine.

Next, the bits of M [6, 9] ₀ are checked, and if it is 1, the mode is A mode. Therefore, the A mode arithmetic routine is executed.

Next, the bits of M [6,9] ₁ are checked, and if the bit is 1, the S mode is entered. Therefore, the S mode operation routine is executed.

On the contrary, if M [6,9] ₁ is 0, the mode is the P mode, so the P mode calculation routine is executed.

FIG. 18 shows the selection of such an arithmetic routine. Details of the calculation contents of each mode are omitted. Wherein M [1,1] is that in order to control the display circuit 124 to performed, display output value calculated by using the M [1,0] [DV] _{H, L} to 0 _{7-0 0} port output Then, the display of Table 7 and the display of M, +,-are performed according to the mode. Also, the control shutter speed value [TV _S ] _{H, L} calculated using M [4,6] and M [5,6] is set to R _{13 to} R ₇ , and the stop timing [t _S ] _{H, Find L} , M
Store in [0,1] and M [0,0].

FIG. 19 is a flow chart of the RAM data output subroutine of FIG. The L ₁₅ terminal is set to L, the X register is set to 7, and the Y register is set to 0.

Next, a data memory M designated by X and Y
[X, Y] is sent out serially from the SO terminal. The instruction code of Fujitsu MB8851 is a 5-byte instruction. That is, the LS instruction transfers the data of the RAM designated by M [X, Y] to the serial buffer SB. Next, by setting $ 20 with the EN instruction, the serial port is activated by the internal clock. TST
The S command tests the SF club and jumps to the label labeled SO until a 4 clock pulse is emitted. The output of the 4-clock pulse causes the data of M [X, Y] of the serial buffer SB to be output from the SO terminal. At this time, the contents of M [X, Y] can be read in synchronization with the clock of the SC / TO terminal.
Next, the contents of the X register are decremented by 1 and the contents of M [0,6] are output from the SO terminal. Repeat this until X = $ F. When X = $ F, M [7,
0], M [6,0], ..., M [0,0] are completely transferred. Therefore, the content of the Y register is incremented by 1, the X register is set to 7 again, and the same operation is repeated. When Y ← Y + 1 is performed and Y = 0, Y = 0 to $
After the operation of F is completed, M [7,0], M [0,0], M
[7, 1], ..., M [0, 1], ... M [7, F],
.., that is, all of the 128-word data of M [0, F] have been transferred. Finally, the R ₁₅ terminal is set to H to complete the flow of the RAM data output subroutine. The serial output SO is, as shown in the timing chart of FIG. 9B,
It is sent at the falling edge of the SC / TO clock.

FIG. 20A shows the output of RAM data and RA.
1 shows a schematic of an apparatus for reading M data. Figure 20B
FIG. 3 is a timing chart showing the operation timing of this. In order to set the mode to output the RAM data, $ 0 must be set to the SI input.
You may only short the SI terminal like 0. The read RAM data is 512 bits (= 4 bits × 8 × 1) synchronized with the SC / TO clock of the MCU 122.
With the register 6), all the information can be arbitrarily extracted. When the RAM data is output, the R ₁₅ terminal becomes L as shown in FIG. 20B, and if it is synchronized with this, the individual data of M [X, Y] can be easily discriminated. The inverter and the AND gate are SC /
This is for removing the TO clock (* part).
Further, when the R ₁₅ terminal is L, the contents of the register are sequentially changed, but when the R ₁₅ terminal is H, the contents of the register are fixed so that the reading can be performed at this time. For example, the photometric output at the center is M [7,
0] and M [6,0] are stored as [PV] _{H, L} , and are the values sent out first from the SO terminal. For example, with a 50 / 1.4 lens attached, EV12
When the brightness is (ISO100), 0,0,0,1,0,
Since it is sent out as 0, 1, 0, it can be read as $ 48. Further, M [7,9] is the 65th, so if this is output as 1000, it is 0001B.
The wide-angle lens is set as shown in.

In the tool of FIG. 20, all 512 bits are read, but it is also possible to take out only the necessary bits, and it is not necessary for the camera side to send out all the bits. . Further, although the switch SW ₀ is used to set the inspection mode, it is also possible to discriminate the mode only by SI input. The switch SW ₀ is used only for the purpose of providing a mode in which the inspection can be performed by operating the switch SW ₀ .

The switch SW ₀ does not need to be a complete switch, and can have the same function by shorting it to GND as long as it has a terminal.

[0058]

As described above, according to the present invention, the mode for adjustment and inspection is programmed in addition to the normal use of the camera, and for example, adjustment of photometric output and various input switches and set value input are performed. Check is possible. In particular, in the case of multi-photometry, a plurality of photometric outputs can be easily adjusted, and even in the case of center-weighted photometry, the minimum bit can be read, so that accurate adjustment can be performed. In addition to the input information, M
Since all the calculated values of the CU 122 can also be read, various information can be imprinted when output to an accessory such as a data bag.

[Brief description of drawings]

FIG. 1 is a multi-photometric pattern.

FIG. 2 is a photometric optical system.

FIG. 3 is a pattern of multi-segment SPD.

FIG. 4 is a block diagram of an embodiment of the present invention.

FIG. 5 is an explanatory diagram of aperture control.

FIG. 6 is a block diagram of a display circuit 123.

FIG. 7 is a display pattern.

8 is an internal configuration of the MCU 122. FIG.

9A and 9B are explanatory diagrams of serial input / output ports.

FIG. 10 is a flowchart of the MCU 122.

FIG. 11 is a flowchart of a subroutine of interrupt processing.

FIG. 12 is a flowchart of a subroutine for setting value input.

FIG. 13 is a flowchart of an A / D conversion subroutine.

FIG. 14 is a flowchart of a subroutine for setting value input.

FIG. 15 is an explanatory diagram of a part of the data memory.

FIG. 16 is an explanatory diagram of a part of the data memory.

FIG. 17 is a program diagram.

FIG. 18 is a flowchart of a subroutine for an apex operation.

FIG. 19 is a flow chart of a RAM data output subroutine.

20A and 20B are explanatory views of a tool for reading RAM data.

Claims (3)

[Claims] 1. A camera for performing exposure control or display by dividing a field of view to perform photometry and performing arithmetic processing on a plurality of photometric outputs, and an input terminal for inputting command data output from outside the camera, Determining means for determining the content of the command data, determining means for determining camera data according to the command data according to the determination result of the determining means, and outputting the determined camera data to the outside of the camera A camera having an output terminal and communication means for outputting the camera data to the outside of the camera via the output terminal. 2. The camera according to claim 1, wherein the camera data includes a plurality of photometric outputs obtained by dividing a field and performing photometry. 3. The camera according to claim 2, wherein the communication unit outputs the plurality of photometric outputs to the outside of the camera one by one through the output terminal.