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1. Port data register 6 (PDR6)
Bit
7
P6
Initial value
0
Read/Write
R/W
PDR6 is an 8-bit register that stores data for port 6 pins P6
If port 6 is read while PCR6 bits are set to 1, the values stored in PDR6 are read, regardless of the
actual pin states. If port 6 is read while PCR6 bits are cleared to 0, the pin states are read.
Upon reset, PDR6 is initialized to H'00.
2. Port control register 6 (PCR6)
Bit
PCR6
Initial value
Read/Write
W
PCR6 is an 8-bit register for controlling whether each of the port 6 pins P6
input pin or output pin.
Setting a PCR6 bit to 1 makes the corresponding pin (P6
bit to 0 makes the pin an input pin.
Upon reset, PCR6 is initialized to H'00.
PCR6 is a write-only register, which always reads all 1s.
3. Port pull-up control register 6 (PUCR6)
Bit
7
PUCR6
Initial value
0
Read/Write
R/W
PUCR6 controls whether the MOS pull-up of each of the port 6 pins P6
a PCR6 bit is cleared to 0, setting the corresponding PUCR6 bit to 1 turns on the MOS pull-up for
the corresponding pin, while clearing the bit to 0 turns off the MOS pull-up.
Upon reset, PUCR6 is initialized to H'00.
6
5
P6
P6
7
6
5
0
0
R/W
R/W
7
6
5
PCR6
PCR6
7
6
0
0
0
W
W
6
5
PUCR6
PUCR6
7
6
0
0
R/W
R/W
4
3
P6
P6
4
3
0
0
R/W
R/W
to P6
.
7
0
4
3
PCR6
PCR6
5
4
3
0
0
W
W
to P6
) an output pin, while clearing the
7
0
4
3
PUCR6
PUCR6
4
3
5
0
0
R/W
R/W
2
1
P6
P6
2
1
0
0
R/W
R/W
2
1
PCR6
PCR6
2
1
0
0
W
W
to P6
functions as an
7
0
2
1
PUCR6
PUCR6
PUCR6
1
2
0
0
R/W
R/W
to P6
is on or off. When
7
0
0
P6
0
0
R/W
0
PCR6
0
0
W
0
0
0
R/W
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