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HD404654 Datasheet, PDF (89/111 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer
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Pin No.
MCU Mode
DP-42S
FP-44A
Pin Name
I/O
29
25
30
26
31
27
32
28
33
29
34
30
35
31
36
32
37
33
38
34
39
35
40
36
41
37
R20
I/O
R21
I/O
R22
I/O
R23
I/O
R30
I/O
R31/TOC
I/O
R32/TOD
I/O
R33
I/O
R40/EVND
I/O
R41/SCK1
I/O
R42/SI1
I/O
R43/SO1
I/O
SEL
I
42
38
–
22
VCC
I
NC
–
–
44
NC
–
Note: I/O: Input/output pin, I: Input pin, O: Output pin
HD404654 Series
PROM Mode
Pin Name
I/O
A0
I
A10
I
A11
I
A12
I
A1
I
A2
I
A3
I
A4
I
O0
I/O
O1
I/O
O2
I/O
O3
I/O
VCC
87
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