Circuit Explanation - Casio 130CR Service Manual

5. CIRCUIT EXPLANATION

5-1. CPU (IC3: uPD780058BGC124-8BTA)
5-1-1. Pin Assignment
P15/ANI5
P16/ANI6
P17/ANI7
AV
SS
P130/ANO0
P131/ANO1
AV
REF1
P70/SI2/RxD0
P71/SO2/TxD0
P72/SCK2/ASCK
P20/SI1
P21/SO1
P22/SCK1
P23/STB/TxD1
P24/BUSY/RxD1
P25/SI0/SB0
P26/SO0/SB1
P27/SCK0
P40/AD0
P41/AD1
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
— 9 —
60 RESET
59 P127/RTP7
58 P126/RTP6
57 P125/RTP5
56 P124/RTP4
55 P123/RTP3
54 P122/RTP2
53 P121/RTP1
52 P120/RTP0
51 P37
50 P36/BUZ
49 P35/PCL
48 P34/TI2
47 P33/TI1
46 P32/TO2
45 P31/TO1
44 P30/TO0
43 P67/ASTB
42 P66/WAIT
41 P65/WR