Cpu Description - Casio CE-T300 Service Manual

CPU pin description(uPD784215GC-175-8EU)
Pin No. Signal Name
1 P120
2 P121
3 P122
4 P123
5 P124
6 P125
7 P126
8 P127
9 VDD
10 X2
11 X1
12 VSS
13 XT2
14 XT1
15 RESET
16 P00
17 P01
18 P02
19 P03
20 P04
21 P05
22 P06
23 AVDD
24 AVREF0
25 P10
26 P11
27 P12
28 P13
29 P14
30 P15
31 P16
32 P17
33 AVSS
34 P130
35 P131
36 AVREF1
37 P70
38 P71
39 P72
40 P20
41 P21
42 P22
43 P23
44 P24
45 P25
46 P26
47 P27
48 P80
49 P81
50 P82
Description
VP ON Thermal printer VP ON signal
CROM IN Flash ROM pack in signal
MOTOR E(R) Receipt printer motor E drive signal
MOTOR E(J) Journal printer motor E drive signal
MOTOR A(J) Journal printer motor A drive signal
MOTOR B(J) Journal printer motor B drive signal
MOTOR A(R) Receipt printer motor A drive signal
MOTOR B(R) Receipt printer motor B drive signal
VDD Power supply VDD +5V
X2 Clock 12.5 MHz
X1 Clock 12.5 MHz
GND Power supply GND
XT2 Clock
XT1 Clock
RESET Reset termial
HS INT HS(Head up Sensor) interrupt signal
COM2 SEL COM 2 selection
CUTTER RP Auto-cutter reset pulse CUTTER RP
PWD Power down signal
VFD BUSY Display controller busy signal
DTR2 DTR2 signal input
IRQ ARCNET Interrupt rquest from ARCNET controller
VDD Power supply VDD +5V
AVREF0 Basic Volatge signal for Thermal printer sensor
AVREF Vp voltage check terminal
HD T(R) Head thermistor input (Receipt printer)
HD T(J) Head thermistor input (Journal printer)
DWS Drawer sensor input
DSR1 COM1 DSR signal
CI1 COM1 CI signal
CD1 COM1 CD signal
P.N.E. Paper near end sensor input
GND Power supply GND
LED SLATCH LED Latch signal
LED CE LED chip enable signal
VDD Connected to VDD +5V
RX2 COM2 and COM3 receive data
TX2 COM2 and COM3 transmit data
RAM ENABLE RAM enable signal
RX1 COM1 receive data
TX1 COM1 transmit data
RTS1 COM1 RTS signal
CPU CLOCK CPU clock output
RTS2 COM2 RTS signal
LED SIN LED data in signal
LED SOUT LED data out signal
LED SCK LED SCK signal out
RB0/CB0 Bank selection RB0/CB0
RB1 Bank selection RB1
RB2 Bank selection RB2
- 10 -
In/Out
Out
In
Out
Out
Out
Out
Out
Out
In
In
In
In
In
In
Out
In
In
In
In
In
In
In
In
In
In
In
In
In
In
Out
Out
In
Out
Out
In
Out
Out
Out
Out
In
Out
Out
Out
Out
Out