144
Port Data Register 7 (PDR7)
Bit
7
6
5
4
3
2
1
0
P7
7
P7
6
P7
5
P7
4
P7
3
P7
2
P7
1
P7
0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR7 is an 8-bit register that stores data for port 7 pins P7
7
to P7
0
. If port 7 is read while PCR7
bits are set to 1, the values stored in PDR7 are directly read, regardless of the actual pin states. If
port 7 is read while PCR7 bits are cleared to 0, the pin states are read.
Upon reset, PDR7 is initialized to H'00.
Port Control Register 7 (PCR7)
Bit
7
6
5
4
3
2
1
0
PCR7
7
PCR7
6
PCR7
5
PCR7
4
PCR7
3
PCR7
2
PCR7
1
PCR7
0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
PCR7 is an 8-bit register for controlling whether each of the port 7 pins P7
7
to P7
0
functions as an
input pin or output pin. Setting a PCR7 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin.
Upon reset, PCR7 is initialized to H'00.
PCR7 is a write-only register. All bits are read as 1.