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Port 1 Data Register (P1DR): P1DR is an 8-bit readable/writable register that stores port 1
output data. When port 1 functions as an output port, the value of this register is output. When
this register is read, the pin logic level is read for bits for which the P1DDR setting is 0, and the
P1DR value is read for bits for which the P1DDR setting is 1.
Bit
Initial value
Read/Write
R/W
P1DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
7
6
P1
P1
7
6
0
0
R/W
R/W
5
4
P1
P1
5
4
0
0
R/W
R/W
Port 1 data 7 to 0
These bits store data for port 1 pins
3
2
P1
P1
3
2
0
0
R/W
R/W
1
0
P1
P1
1
0
0
0
R/W
167
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