Sharp AM-900 Service Manual page 85

2.2.3 Signal assignment to the Printer CPU pins
Mechanism control CPU
Control unit
Signal
OA-2000 I/F /STS
/SCLK
/CMD
/PCURES
/DCRDY
/DREADY
/EPRDY
/VSYNC
/CPRDY
/DPAGE
/DSRDY
LSU APC_AUTO
/SYNC
PMCLK
LDEN
PMD
/LASERON
SAMPON
SYN_LON
High voltage PWM0
PWM1
PWM2
/PWMINT
MCON
TC/BSON
Sensor /PIN
/POUT1
/POUT2
PE_BY
OPEN_TRAY
/DOP
/CAMSW
/ROLSNS
TCT2
TCT1
TCT0
Fusing RTH
HLON
Main motor /MEN
/MMRES
STEP
Pickup motor PUMA
PUMB
/PUMA
/PUMB
Fan VFM
Power supply /ZC
PWRLY
Pin No.
TXD Video I/F signals to/from the main CPU (OA-2000)
SCK
RXD
RESET
GPO
GPO
GPO
GPO
GPI
GPI
GPI
TMOV APC timing generation signal for line cycle
TRGV Laser main scanning sync signal
IRQ
FTIOA1 Polygon motor clock
GPO Laser circuit driving signal
GPO Polygon motor driving signal
GPO Laser on
GPO APC circuit sample signal
GPO Next line laser on (SYNC)
FTIOB0 Clock for high voltage control clock PWMSIN
FTIOC0 Clock for high voltage control clock PWMSIN
FTIOD0 Clock for high voltage control clock PWMSIN
IRQ Timer setting change interrupt
GPO Charge control
GPO Transfer/DC bias control
GPI Main unit paper feed detection (Paper-In)
GPI Paper eject detection (Paper-Out/fusing section)
GPI Paper eject detection (Paper-Out/exit roller section)
GPI Detection of paper presence in the bypass tray
GPI Tray cover open/close detection
GPI Door open/close detection (front and right doors)
GPI Cam home position detection
GPI PU roller rotational position detection
GPI Toner cartridge identification
(Destination and initial toner charge)
GPI
GPI
AN Thermistor analog input (temperature detection)
GPO Heater lamp ON/OFF control
GPO Excitation enable
GPO Reset input (Home State)
FTIOA Step clock
GPO Excitation phase A
GPO Excitation phase B
GPO Excitation phase /A
GPO Excitation phase /B
GPO Fan ON/OFF control
IRQ AC zero-cross signal input
GPO Power relay ON/OFF signal
5 – 12
Description
AM-900U