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

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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
— 9 —
Function

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