Canon ImageRunner iR8500 Series Service Manual page 889

Address Bit Description
P001 0 scanner motor clock signal
1 scanner motor CCW/CW switch signal
2 scanner motor HOLD/OFF switch signal
3 scanner motor driver reset signal
4 scanner motor stream reading current switch signal
5 original sensor ON switch signal
6 fan error signal
7 scanning lamp ON switch signal
P002 0 SK signal to EEPROM
1 DDI-SPI (1)
2 DDI-SPI (2)
3 DI signal to EEPROM
4 DDI-SCTS
5 DDI-SPRDY
6 DDI-SCPRDY
7 scanning lamp inverter error signal
P003 0 DDI-S transmission
1 RS232C transmission (factory terminal transmission)
2 DDI-S reception
3 RS232C reception (factory terminal reception)
4 ITOP transmission (image leading edge signal)
5 DDI-SRTS
6 not used
7 not used
P004 0 DDI-SPO (0)
1 DDI-SPO (1)
2 DDI-SPO (2)
3 not used
4 not used
5 not used
6 original sensor 3 signal (AB input)
7 original sensor 4 signal (Inch input)
P005 0 DDI-SPRTST
1 serial data to CCD
2 clock to CCD
3 output to RING2
P006 0 not used
1 PCB check mode (for factory)
2 scanning lamp (LOW/HI) switch signal
3 CS output to EEPROM
4 scanner HP sensor signal
5 ADF-ITOP (image leading edge) signal
6 copyboard cover sensor (used as interrupt)
7 copyboard cover sensor
T-17-36
Notation
M3
M3
M3
M3
PS43
LA2
PS43
PS43
LA2
PS39
PS40
PS40
Chapter 17
Remarks
when 1->0, ON
0: CCW, 1: CW
0: current hold,
1: current OFF
1: reset
0: stream reading
current
0: sensor ON
not used
0: lamp ON
normal clock
not used
not used
DATA area
0: DDI reception
ready
0: DDI power
ready
0: DDI power
ready
1: error
DATA area
DATA area
DATA area
DATA area
not used
0: DDI
transmission ready
not used
not used
not used
0: original present
0: original present
0: DDI-SPRTST
signal ON
DATA area
when 0->1->0,
data transmitted
when 0->1->0,
data transmitted
0: check mode
not used
1: CP
1:HP
0: ADF original
image
leading edge
interrupt
1:ADF
(copyboard)
closed
1:ADF
(copyboard)
closed
17-45