Lsi, Ic (Pin Function) - Casio SF-4300A Service Manual & Parts List

6. LSI, IC (Pin function)

µ
6-1. CPU: PD 3056G-007 (LSI 1)
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Pin No. Signal
1 ~ 8 P0 ~ 7
9 VSS
10 XI
11 TSB
12 X0
13 VDD2
14 VDD1
15 FI
16 FO
17 SW
18 ISW
19 ~ 21 CS1 ~ 3
22 FE
23 WE
24 CKO
25 ~ 32 IO0 ~ 7
33 ~ 48 A0 ~ 15
49 ~ 63 KAC ~ K14
64 INT
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
µPD 3056G-007
1 2 3 4 5 6 7 8
I/O
I/O PORT P0: I/F output P1: I/F input
I GND (0V) P6, P7: For buzzer
I Clock input
Test Terminal
O Clock output
O Internal power supply terminal
I Power supply terminal (+5V)
I Internal clock terminal
O Internal clock terminal
I Main switch signa
I Sub switch signal
O Enable signal for RAM
O Enable signal for ROM
O Write enable signal for RAM
O Clock signal for LCD driver (NM360)
I/O Data bus
O Address bus
Key signal from keyboard
I Interrupt terminal
—
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
9 10 11 12 13 14 15 16
Function
—
10
Power OFF: 0V ON: 5V
Power ON: 0V OFF: 5V
Power ON: 0V OFF: 5V