Canon EOS 55 Service Manual page 88

Part 2: Technical Information
Pin
Name
Function
50 /RESMPU
MPU reset signal input (from the LCD driver)
51 /LCDREQ
Communication request from the LCD driver
52
/FLASH
Flash firing signal (Not used)
53
MG3-l 1st shutter curtain release signal
54 MG3-2 2nd shutter curtain release signal
55
Not used
56 DATE Date printing signal
57 /TINTE AF BASIS accumulation completion signal
58 CMSPl Motor phase signal
59 Not used
60 BCLK Drive reference clock for BASIS, Y-BASIS, Y-LED IC, and EF IC
61
RXD
Serial communication: not used
62 TXD Serial communication: not used
63 REDEYE
Red-eye reduction lamp emitter
64 LIN Communications line to lens (input)
65 LOUT Communications line from (output)
66 LCLK Lens communications clock
67 MISO Communications line from other ICs (input)
68 MOSI Communications line to other ICs (output)
69 SCLK Communications clock with other ICs
70 PANO Date printing position shift signal (Set to panorama at
Hi)
71 CSLCD, DO LCD driver select and exposure sensor area select
72 CSAF0,Dl AF BASIS communications chip select/ exposure sensor area select
73
CSAFl, D2
AF BASIS communications chip select/ exposure sensor area select
74 CLK0 BASIS drive reference clock
75 Not used
76 CLKl BASIS drive reference clock
77 CLK2
BASIS drive reference clock
78 READ BASIS drive reference clock
79
DGND Digital ground
80 FAR 16MHz oscillator connector
81 EFAR 16MHz oscillator connector
82 VDD Power supply
83 /EXREQ Tool communication request
84 PTIN
Film cartridge switch
85 SWl Ranging/Metering start switch
86
LMESl
Metering mode select switch
87 LMES2 Metering mode select switch
88 AFMODEl AF mode select switch
89 AFMODE2 AF mode select switch
90 DRIVE Drive mode switch
91 PANORAMA Panorama
92 SHBUSY External flash sensor switch
93 POPCTR Flash pop-up control switch
94 CMSP2 Motor phase signal
95 CMSP3 Motor phase signal
96 CN2 2nd curtain travel completion signal sensor
97 HVSWl Camera framing detect switch
98
HVSW2 Camera framing sensor switch
99 VON HV sensor current control
100 SPLEDl Superimpose SPLED 1 emitter
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