UPD784020 Datasheet, PDF (10/90 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCOMPUTER

4. SYSTEM CONFIGURATION EXAMPLE (PPC)
Serial
communication
µ PD27C1001A
OE
CE
A8-A16
O0-O7
µ PD74HC573
A0-A7
µPD784021
RxD
TxD
RD
A17
A8-A16
P11
P15
P16
P17
SCK1
SI1
SO1
P04
P06
AD0-AD7
P07
ASTB
Sensing paper transport
Temperature of the
fusing heater
Brightness of the lamp
P66
INTP0
ANI0
PWM0
P00-P03
ANI1
Lever for adjusting
the tone of the copy
Lever for compensating
the tone of the copy
Reset
circuit
P33
ANI2
P34
ANI3
P35
P36
RESET
P37
mPD784020, 784021
Sensing paper
Sensing paper feed
Sensing paper ejection
Sensing the position of the scanner station
Operator
panel
High-voltage
control circuit
Drum, toner, and charge for
transfer
Fusing heater
control circuit
Fusing roller
Lamp regulator
Lamp for lighting the original
Lamp for discharging
(DC stepping motor)
M Main motor
Driver
S L ^{Clutch for stopping}
the scanner station
SL
Clutch for forwarding
the scanner station
S L ^{Clutch for the resist}
shutter
S L ^{Clutch for manual}
feeding
S L ^{Clutch for cassette}
feeding
Solenoid
10