Canon EOS 50 E - Page 90

Part 2: Technical Information
EF-IC (LC4090)
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Name
IREF
CCC
AVEF
SENSE
EFID
STSP
SYNC
STCR
DGND
osc
SPCR
BCLK
El
SCLK
DGND
MOSI
CSEFl
CSEF0
MISO
/RES2
PWR
E2
VBAT
AGND
VRH
EFAD
DACl
DAC2
vc
AGND
Function
Current reference
External flash charge completion signal
External flash aperture signal
Built-in flash DC/DC voltage feedback
External flash communication signal
External flash starting and completing controller
Shutter X sync trigger
Not used
Digital ground
Built-in flash charge controller
Built-in flash termination Signal
Reference clock input
Logic circuits power supply
Communications clock input
Digital ground
Communication line (input)
Communications chip selector
Communications chip selector
Communication line (output)
El voltage sensor output
VBAT voltage sensor output
Analog power supply
Power Supply (battery)
Analog ground
A/D reference voltage output (3.2V)
Analog data output (ITL data)
D/Ainput
D/Ainput
Reference Voltage (1.2V)
Analog ground
2-46