Pin Function - Casio CSF-8950 Service Manual & Parts List

7. PIN FUNCTION

CPU (HD62119A03)
Pin No. Pin Name
1 ~ 12 KO1 ~ KO12
13 ~ 20
21
22
23
24 ~ 42 AO0 ~ AO18
43
44
49 ~ 51 CS4BO ~ CS6BO
52 ~ 59
62, 63 OPT0, OPT1
64 ~ 71 PORT0 ~ PORT7
72
73, 74
75
76, 77
78
79
80, 81
82
83
84
85
86
87
89
90
91 ~ 94 VD1 ~ VD4
95
96
97
98, 99 VDT1I, VDT2I
100
Input/Output
O
KI1 ~ KI8
BUFON O
IT2
IT0 —
O
OEBO O
WEBO O
O
IO0 ~ IO7
O
I/O
VSS —
PI, PO —
VLC —
XO, XI —
VCC —
VREG2 —
TS1, TS2
VSSR —
BZZ1 O
BZZ2 O
VSS —
OCLK O
ITOFF I/O
SW
VDB —
—
VREG1 —
VREG4 —
VREG5 —
VREG3 —
Key common signal
I Key input signal
Chip selecting signal for RAM
I Interrupt input
Interrupt input
Address bus
Enable signal
Enable signal to write
Chip selecting signals
I Data bus
Output point for check
Input/output port
GND
Power for ceramic oscillator
Power
Power
Power for LSI
Power
I Terminal for test
GND
Buzzer signal output
Buzzer signal output
GND
Clock
Terminal for power switch
I Reset switch
Power
Power for doubler
Regulator power for LSI
Regulator power for ROM
Regulator power
I Terminal for detector
Regulator power for RAM
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Function