Ic Pin Descriptions - Canon EOS 55 Service Manual

Part 2: Technical Information
4. IC PIN DESCRIPTIONS
MPU (MB90233)
Pin
Name
1 SPLED2
2 SPLED3
3 ACKCSGERO
4 PCBUSY
5 SLEEP
6
/VB2ON
7 ICNTO
8
ICNTl
9
DGND
10
ICNT2
11
ICNT3
12 ICNT4
13
PLED
14 ENA2
15
/LATCH
16 MlF
17 MlR
18 FLED
19
AUXLED
20 SPLMD
21 VDD
22 ENAl
23 YV
24
YH
25 /CSY(ADTRG)
26 ESI
27 ESO
28 ESK
29 ECS
30
DAl
31 DA2
32
E2
33 VRH
34 AGND
35 AGND
36
IRAD
37 YOUT
38
AFAD
39
AEAD
40 DGND
41 EFAD
42 CSEF0
43
CSEFl
44 PRAD
45 PRON
46 SW2
47 DGND
48 VDD
49 DGND
Function
Superimpose SPLED2 emitter
Superimpose SPLED3 emitter
Eye-control adjustment signal
Eye-control adjustment signal
MPU operation mode monitor
Control signal for lens power application
Current limiter for Eye-control IRED
Current limiter for Eye-control IRED
Digital ground
Current limiter for Eye-control IRED
Current limiter for Eye-control IRED
Current limiter for Eye-control IRED
Emitter for 4 panorama LEDs
Emitting control for the eye-control IRED
Communication control for eye-control IRED driver
Motor control signal
Motor control signal
Luminance control for the viewfinder LED and the panorama LED
AF auxiomy LED control signal
Luminance control for the superimpose LED
Power supply
Eye-control IRED emitter
Eye-control Y-BASIS control signal
Eye-control Y-BASIS control signal
Chip selector for Eye-control Y-BASIS communication
EEPROM serial data input
EEPROM serial data output
EEPROM clock output
EEPROM chip select signal output
D/A Converter output (Channel 1)
D / A Converter output (Channel 2)
Analog power supply
Full-scale reference voltage for A/D and D / A (3.2V)
Analog ground
Analog ground
Eye-control IRED emitting monitor
Eye-control BASIS image signal input
AF BASIS image signal input
Analog exposure sensor signal input
Digital ground
TIL sensor analog signal input
TIL sensor chip select signal
TIL sensor chip select signal
Analog film winding photoreflector signal input
Film winding photoreflector control signal
Release switch
Digital ground
Power supply
Digital ground
2-43