Program Rom Simm Interface - Sharp AR-P13 Service Manual

1.4

Program ROM SIMM Interface

(J8: Printer Board
Pin No.
1 GND
2-9 D0, 16, 1, 17, 2, 18, 3, 19
10 +5V
11-19 A8, 9, 10, 0, 1, 2, 3, 4, 11
20-27 D4, 20, 5, 21, 6, 22, 7, 23
28-29 A5, 12
30 +5V
31-32 A6-7
33-38 Not used
39 GND
40 -0E
41 A18
42-43 Not used
44-45 -CS1-0
46-48 A13-15
49-58 D8, 24, 9, 25, 10, 26, 11, 27, 12, 28
59 +5V
60-65 D29, 13, 30, 14, 31, 15
66 A16
67 -WE
68-71 A21, 20, 19, 17
72 GND
↔ ↔ ↔ ↔ ↔
Program ROM SIMM)
Signal Name Direction
- GND
↔
P PR Data signal
- +5V power
P → PR
Address signal
↔
P PR Data signal
P → PR
Address signal
- +5V power
P → PR
Address signal
- GND
P → PR
Read data signal
P → PR
Address signal
P → PR
Chip select signal
P → PR
Address signal
↔
P PR Data signal
- +5V power
↔
P PR Data signal
P → PR
Address signal
P → PR
Write data signal
P → PR
Address signal
- GND
5-7
Note