Casio CE-6800, Service Manual

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CPU pin description(uPD784215GC201-8EU)
Pin No. Signal Name Description In/Out
1 P120 HD1 HEAD PIN DRIVE HD1 Out
2 P121 HD2 HEAD PIN DRIVE HD2 Out
3 P122 HD3 HEAD PIN DRIVE HD3 Out
4 P123 HD4 HEAD PIN DRIVE HD4 Out
5 P124 HD5 HEAD PIN DRIVE HD5 Out
6 P125 HD6 HEAD PIN DRIVE HD6 Out
7 P126 HD7 HEAD PIN DRIVE HD7 Out
8 P127 HDGATE2 HEAD GATE2 Out
9 VDD VDD Power supply VDD +5V
10 X2 X2 Clock 12.5 MHz In
11 X1 X1 Clock 12.5 MHz In
12 VSS GND Power supply GND
13 XT2 XT2 Clock In
14 XT1 XT1 Clock In
15 RESET RESET Reset termial In
16 P00 TP Timing puls from printer TP In
17 P01 COM2 SEL COM 2 selection Out
18 P02 CUTTER RP Auto-cutter reset pulse CUTTER RP In
19 P03 PWD Power down signal In
20 P04 VFD BUSY Display controller busy signal In
21 P05 RP Reset pulse from printer RP In
22 P06 IRQ ARCNET Interrupt rquest form ARCNET controller In
23 AVDD VDD Power supply VDD +5V
24 AVREF0 AVREF0 Connected to VDD +5V
25 P10 AVREF Vp voltage check terminal In
26 P11 HDTH Head thermistor input In
27 P12 CROM IN Flash ROM cassette in signal In
28 P13 DWS Drawer sensor input In
29 P14 DSR1 COM1 DSR signal In
30 P15 CI1 COM1 CI signal In
31 P16 CD1 COM1 CD signal In
32 P17 P.N.E. Paper near end sensor input In
33 AVSS GND Power supply GND
34 P130 LED SLATCH LED Latch signal Out
35 P131 LED CE LED chip enable signal Out
36 AVREF1 VDD Connected to VDD +5V
37 P70 RX2 COM2 and COM3 receive data In
38 P71 TX2 COM2 and COM3 transmit data Out
39 P72 RAM ENABLE RAM enable signal Out
40 P20 RX1 COM1 receive data In
41 P21 TX1 COM1 transmit data Out
42 P22 RTS1 COM1 RTS signal Out
43 P23 MOTOR Motor drive signal Out
44 P24 RTS2 COM2 RTS signal Out
45 P25 LED SIN LED data in signal In
46 P26 LED SOUT LED data out signal Out
47 P27 LED SCK LED SCK signal out Out
48 P80 RB0/CB0 Bank selection RB0/CB0 Out
49 P81 RB1 Bank selection RB1 Out
50 P82 RB2 Bank selection RB2 Out