COPYRIGHT © 2001 CANON INC.
2000 2000 2000 2000
CANON SUPER G3 FAX BOARD-J1 REV.0 JUNE 2001
CHAPTER 2 BASIC OPERATION
2-6
5 Signals
G3 fax control PCB (J31)
¬ ®
Main controller PCB (J1005)
J31
J105
signal
Description
A1
A20
FSTROBE
host clock
A2
A19
FD0
data signal 0
A3
A18
FD1
data signal 1
A4
A17
FD2
data signal 2
A5
A16
FD3
data signal 3
A6
A15
FD4
data signal 4
A7
A14
FD5
data sing 5
A8
A13
FD6
data signal 6
A9
A12
FD7
data signal 7
A10
A11
FNACK
peripheral clock
A11
A10
FBUSY
forward ACK signal
A12
A9
FPERROR
reverse ACK signal
A13
A8
FSELECT
transfer mode switch signal (H=ECP mode)
A14
A7
FRESET
forced reset signal
A15
A6
FOPTIONO
board detection signal (H=present)
A16
A5
NC
not used
A17
A4
NC
not used
A18
A3
GND
3.3V ground
A19
A2
FSPKON
speaker ON (L=being generated)
A20
A1
HPDIR
not used
B1
B20
PWCTL
ESS release command signal to fax board (L=ESS release)
B2
B19
CICNT
pseudo CI control signal
B3
B18
NC
not used
B4
B17
ESSACT
ESS release request signal (L=ESS release) for G4
B5
B16
FSPOUT
line monitor analog output
B6
B15
GND
3.3V ground
B7
B14
FCID
CI/FC/CNG detection signal
B8
B13
FOFFHK
OFFHOOK signal
A9
B12
BUSDIR
bus direction control signal to HOST
B10
B11
NC
not used
B11
B10
NC
not used
B12
B9
NC
not used
B13
B8
GND
3.3V ground
B14
B7
GND
3.3V ground
B15
B6
GND
3.3V ground
B16
B5
GND
3.3V ground
B17
B4
FNSELECT IN 1284 active (H=ECP mode)
B18
B3
FNINT
nReverse request
B19
B2
FNFAULT
nPeripheral request (L= data from peripheral present)
B20
B1
FNAUTOFD
reverse mode control signal