Casio QV-10A Service Manual & Parts List page 9

CPU PIN FUNCTION
Pin No. Terminal Name I N / O U T Function
1 PB14
2 PB15
3 VSS
4 - 11 AD0 - AD7
12 VSS
13 - 14 AD8 - AD9
15 VCC
16 - 21 AD10 - AD15
22 VSS
23 - 30 A0 - A7
31 VSS
32 - 33 A8, A9
34 - 39 A10 - A15
40 VSS
41, 42 A16, A17
43 VCC
44 - 47 A18 - A21
48 - 50 CS0 - CS2
51 CASL
52 VSS
53 PAO
54 RAS
55 CS6
56 WAIT
57 WR
58 PA5
59 RD
60 PA7
61 VSS
62 PA8
63 PA9
64 - 66 PA10 - PA12
67 DREQ0
68 IRQ2
69 PA15
70 VCC
71 CK
72 VSS
73 EXTAL
74 XTAL
75 - 77 VCC, NMI, VPP
78 WDTOVF
79 RES
80 MD0
81 MD1
82 MD2
OUT Timing pattern output.
— Not used.
IN Ground terminal.
IN/OUT Address bus.
IN Ground terminal.
— Not used.
IN Power source.
— Not used.
IN Ground terminal.
OUT Address bus.
IN Ground terminal.
OUT Address bus.
— Not used.
IN Ground terminal.
— Not used.
IN Power source.
— Not used.
— Not used.
OUT CAS(Column Address Strobe) signal for D RAM.
IN Ground terminal.
— Not used.
OUT RAS(Row Address Strobe) signal for D RAM.
OUT Chip select signal.
— Not used.
OUT Write enable signal for outer memory (low-order 8-bit).
OUT Write enable signal for outer memory (high-order 8-bit).
OUT Read enable signal for outer memory.
— Not used.
IN Ground terminal.
IN Bus request signal.
OUT Interrupt request signal.
— Not used.
IN Interrupt request signal.
IN Interrupt request signal.
IN Interrupt request signal.
IN Power source.
OUT System clock pulse.
IN Ground terminal.
IN Clock pulse input.
— Not used.
IN Power source.
— Not used.
IN Reset signal input.
IN Ground terminal.
IN Connected to VCC3.
IN Connected to ground.
— 7 —