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Table 15-2 Relationship between Each Port (Pin) and Port Register
Port
Symbol
Port0A
(P0A)
Port0B
(P0B)
Port0C
(P0C)
Port0D
(P0D)
Port1A
(P1A)
Port1B
(P1B)
Port1C
(P1C)
Note Nothing is mapped to b
Pin
I/O
Bank
P0A
3
P0A
2
I/O
(bit I/O)
P0A
1
P0A
0
P0B
3
P0B
2
I/O
(bit I/O)
P0B
1
P0B
0
BANK0
BANK2
P0C
3
P0C
2
Output
P0C
1
P0C
0
P0D
3
P0D
2
Input
P0D
1
P0D
0
P1A
3
P1A
2
Output
P1A
1
P1A
0
P1B
3
P1B
2
I/O
BANK1
(bit I/O)
P1B
1
P1B
0
P1C
3
I/O
P1C
2
(group I/O)
P1C
1
No target pins
of 72H. When b
is read, 0 is always read.
0
0
Data setting method
Port register (data memory)
Bit symbol
Address
Symbol
(reserved word)
b
3
b
2
70H
P0A
b
1
b
0
b
3
b
2
71H
P0B
b
1
b
0
b
3
b
2
72H
P0C
b
1
b
0
b
3
b
2
73H
P0D
b
1
b
0
b
3
b
2
70H
P1A
b
1
b
0
b
3
b
2
71H
P1B
b
1
b
0
b
3
b
2
72H
P1C
b
1
b
0
PD17062
P0A3
P0A2
P0A1
P0A0
P0B3
P0B2
P0B1
P0B0
P0C3
P0C2
P0C1
P0C0
P0D3
P0D2
P0D1
P0D0
P1A3
P1A2
P1A1
P1A0
P1B3
P1B2
P1B1
P1B0
P1C3
P1C2
P1C1
Note
193
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