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Pin Function - Casio CSF-5350 Service Manual & Parts List

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PIN FUNCTION

CPU HCD62121A02 (HC-3017) : COB
NOTE: The CPU is bonding on the PCB. If the CPU is defective, replace the Z889-1 PCB ass'y
because the CPU cannot be replaced.
Pin No.
Pin Name
1 ~ 14
KO14 ~ KO1
15 ~ 22
KI8 ~ KI1
23
BUFON
24
IT2
25
IT0
26 ~ 46
AO20 ~ AO0
47 ~ 54
IO0 ~ IO7
55
OEBO
56
WEBO
57 ~ 64
CS10BO ~ CS3BO
65
OPT7
69 ~ 72
OPT3 ~ OPT0
73
PORT7
74
PORT6
75
PORT5
76
PORT4
80
PORT0
81
VSS
82
PI
83
PO
84
VDD
85
XO
86
XI
87
VCC
88
VREG2
89, 90
TS1, TS2
91
VSSR
92
BZZ1
93
BZZ2
94
VSS
95
OCLK
96
ITOFF
97
TEMU
98
SW
99
VDB
100
VREG1
101
VREG4
102
VREG5
103
VDT1I
104
VDT2I
105
VREG3
Input/Output
O
Key common signal
I
Key input signal
O
Chip select for RAM
I
Interrupt input
I
Interrupt input
O
Address bus
I / O
Data bus
O
Output enable signal for RAM
O
Write enable signal for RAM
O
Chip selecting signals
O
Reset signal output
O
Changeover signal
I
Receiving terminal for data communication
I
Receiving terminal for data communication
O
Transmitting terminal for data communication
O
Transmitting terminal for data communication
I
Low battery message for back-up battery (2.6V)
I
GND
I
1MHz clock input
O
1MHz clock output
I
+3V source
O
4.3MHz clock output
I
4.3MHz clock input
I
+3V source
O
Voltage for main switch detection
Test terminals of factory purpose only
I
GND
O
Buzzer signal output
O
Buzzer signal output
I
GND
O
Clock output
I
Switching terminal from main switch
Test terminals of factory purpose only
I
Receiving terminal for reset switch
I
+3V source
Test terminals of factory purpose only
O
+3V source for ROM
Test terminals of factory purpose only
I
Forced power off detecting terminal (2.3V)
I
Low battery message for main battery (2.5V)
+3V source for RAM
— 10 —
Function

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