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SHARP SERVICE MANUAL JX8200SM [13] ELECTRICAL SECTION
2. PCU
A. PCU block diagram
Sensors/Detectors
Control signal
High voltage
AMP (IC14)
unit
Operation unit
Key signal/Display signal
B. Main device
(1) CPU
a. Block diagram
PROGAMMABLE
NMI
INTERRUPT
CONTROLLER
INTP
5
10
TO
4
TCLR
TIMER/COUNTER UNIT
2
(REALTIME
TI
PULSE UNIT)
TIUD
TCUD
3
SCK
2
SO
SO/SB0
SERIAL
2
INTERFACE
SI
(SBI)
(UART)
SI/SB1
TXD
RXD
REALTIME OUTPUT
RTP
8
PORT
(Note 1) : µPD78355 does not include ROM.
µPD78356 includes 48KByte PROM.
(Note 2) : The ECC circuit included only in µPD78P356.
ICU
Data/Control signal
Address/Data signal
Data signal
CPU (IC1)
NV-RAM
(IC15)
Motor control signal
Scanner control signal
Video signal
Scanner unit
EXU
Main RAM
GENERAL
REGISTERS
128 x 8
ALU
&
DATA
MEMORY
128 x 8
MICRO
SEQUENCE
CONTROL
MICRO ROM
A/D
D/A
CONVERTER
CONVERTER
Remark
13 – 33
Data/Control signal
G/A (IC10)
ROM(Note 1)
Peripheral RAM
SYSTEM
CONTROL
48K X 8
1792 x 8
CONTROL
PREFETCH
CONTROL
ECC
(Note 2)
WATCHDOG
PWM
TIMER
: µPD78P356 PROM programming mode
Drive signal
DRIVER
Loads
(IC3/4/5/6/8/9)
DRIVER
Toner
(IC12)
motor (black)
DRIVER
Drum motor
(IC11)
DRIVER
Paper feed
(IC7)
motor
DRIVER
Fusing motor
(IC2)
DRIVER
Toner
(IC13)
motor (Color)
BCU
CLKOUT
X1
X2
RESET
ASTB
RD
LWR
HWR
&
WAIT
MODE1
MODE0/ VPP
BUS
8
AD8-AD15
8
AD0-AD7
&
17
A0-A16
8
D0-D7
PGM
CE
OE
PORT
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