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2. NAIN PWB CPU (IC203) SIGNAL NAME
PIN No.
Port
1
P50/TXD
2
P51/RXD
3
P52/SCK
4
/RES
5
/NMI
6
VCC
7
/STBY
8
VSS
9
XTAL
10
EXTAL
11
MD1
12
MD0
13
AVSS
14
P70/AN0
15
P71/AN1
16
P72/AN2
17
P73/AN3
18
P74/AN4
19
P75/AN5
20
P76/AN6
21
P77/AN7
22
AVCC
23
P60/FTCI/TMCIO
24
P61/FT0A
25
P62/FTIA
26
P63/FTIB/TMRIO
27
P64/FTIC/TM00
28
P65/FTID/WDCLK
29
P66/FTOB/TMRI1
30
P67/TM01
31
VCC
32
P27/A15
33
P26/A14
34
P25/A13
35
P24/A12
36
P23/A11
37
P22/A10
38
P21/A9
39
P20/A8
40
VSS
41
P17/A7
42
P16/A6
43
P15/A5
44
P14/A4
45
P13/A3
46
P12/A2
47
P11/A1
48
P10/A0
49
P30/D0
50
P31/D1
51
P32/D2
52
P33/D3
53
P34/D4
54
P35/D5
55
P36/D6
56
P37/D7
57
P40//ADTRG//IRQ2 FW
58
P41//IRQ1
59
P42//TRQ0
60
P43//RD
61
P44//WR
62
P45//AS
63
P46/@
64
P47//WAIT
Signal name
IN/OUT
SDA (EEPROM)
OUT/IN
NC
OUT
SCL (EEPROM)
OUT
RESET
/NM1
VD
VD
GND
XTAL
XTAL
VD
VD
GND
HLTH
AESP
VRV
GND
GND
GND
GND
GND
VD
HL
OUT
CSEG 0
OUT
MREP
CSEG 1
OUT
MMCLK
OUT
WDCLK
OUT
NC
OUT
CLCLK
OUT
VD
RRS B
OUT
RRS A
OUT
PR
OUT
THS
OUT
PFS
OUT
/MHV
OUT
GBC
OUT
DVB
OUT
GND
NC
OUT
DSEG6 (DISPLAY)
OUT
DSEG5 (DISPLAY)
OUT
DSEG4 (DISPLAY)
OUT
DSEG3 (DISPLAY)
OUT
DSEG2 (DISPLAY)
OUT
DSEG1 (DISPLAY)
OUT
DSEG0 (DISPLAY)
OUT
PID (PAPER IN)
POD (PAPER OUT)
TCSP (TONER CONTROL)
TCSP (TABLE POSITION)
KI (KEY INPUT)
SMIP0
SMIP1
SMIP2
FW
MREP
SMOP0
OUT
SMOP1
OUT
SMOP2
OUT
MSIM
NC
OUT
Active level
—
EEPROM data signal line
—
—
EEPROM clock signal line
IN
L
Reset state at LOW (OV).
/IN
L
Driven LOW when the CPU is hung up,and interruption occurs.
IN
—
Power (5V)
IN
H
Hardware standby mode signal (not used).
IN
—
Power (GND)
IN
—
Clock (10MHz)
IN
—
Clock (10MHz)
IN
H
Operation mode, control signal
IN
H
Operation mode, control signal
IN
—
Power (GND)
IN
—
Analog signal (thermistor)
IN
—
Analog signal (AE sensor)
IN
—
Analog signal (Volume voltage simulation)
IN
—
Analog signal (not used)
IN
—
Analog signal (not used)
IN
—
Analog signal (not used)
IN
—
Analog signal (not used)
IN
—
Analog signal (not used)
IN
—
A/D convertor power pin (5V)
H
Heater lamp control signal
H
Display (common 0) control signal
IN
Falling edge Motor encoder signal
H
Display (common 1) control signal
H
Motor control signal (PWM)
—
Watch dog timer pulse signal
—
H
Copy lamp control signal (PWM)
IN
—
Power (5V)
H
Paper start solenoid control signal
H
Paper start solenoid control signal
H
Power relay control signal
H
Toner supply solenoid control signal
H
Paper feed solenoid control signal
L
High voltage control signal
H
Grid control signal
H
Developing bias control signal
IN
—
Power (GND)
—
H
Display (segnent 6) control signal
H
Display (segnent 5) control signal
H
Display (segnent 4) control signal
H
Display (segnent 3) control signal
H
Display (segnent 2) control signal
H
Display (segnent 1) control signal
H
Display (segnent 0) control signal
IN
L
Paper entry detection (L: paper presence)
IN
L
Paper exit detection (L: paper presence)
IN
L
Toner density detection (L: under toner)
IN
—
Tadle position detection (H: feed side)
IN
H
Key input signal
IN
—
Machine mode select signal (input)
IN
—
Machine mode select signal (input)
IN
—
Machine mode select signal (input)
IN
—
Zero cross signal
IN
—
Zero cross signal
IN
—
Motor encoder signal
—
Machine mode strobe signal (Output)
—
Machine mode strobe signal (Output)
—
Machine mode strobe signal (Output)
IN
—
Machine emulation signal (Input)
—
– 33 –
Specifications
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