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Chapter 7
I/O Port
7.2.2
Port n Input Registers
PnIN is the register to read the input data from when I/O is used as a general purpose port.
Port 0 Input Register (P0IN: 0x03F20)
bp
Bit name
At reset
Access
bp
7-0
Port 1 Input Register (P1IN: 0x03F21)
bp
Bit name
At reset
Access
bp
7-0
VII - 8
Control Registers
7
6
X
X
R
R
Bit name
Input data
0: Input "Low" (V
P0IN7-0
1: Input "High" (V
7
6
X
X
R
R
Bit name
Input data
0: Input "Low" (V
P1IN7-0
1: Input "High" (V
5
4
3
P0IN7-0
X
X
X
R
R
R
Description
-level)
SS
-level)
DD30
5
4
3
P1IN7-0
X
X
X
R
R
R
Description
-level)
SS
-level)
DD30
2
1
0
X
X
X
R
R
R
2
1
0
X
X
X
R
R
R
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