1.
Port data register 6 (PDR6)
PDR6 is an 8-bit register that stores data for port 6 pins P6
7
to P6
0
.
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)
PCR6 is an 8-bit register for controlling whether each of the port 6 pins P6
7
to P6
0
functions as an
input pin or output pin.
Setting a PCR6 bit to 1 makes the corresponding pin (P6
7
to P6
0
) an output pin, while clearing the
bit to 0 makes the pin an input pin. PCR6 and PDR6 settings are valid when the corresponding pins
are designated for general-purpose input/output by bits SGS3 to SGS0 in LPCR.
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)
PUCR6 controls whether the MOS pull-up of each of the port 6 pins P6
7
to P6
0
is on or off. When
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.
Bit
Initial value
Read/Write
7
PUCR6
0
R/W
6
PUCR6
0
R/W
5
PUCR6
0
R/W
4
PUCR6
0
R/W
3
PUCR6
0
R/W
0
PUCR6
0
R/W
2
PUCR6
0
R/W
1
PUCR6
0
R/W
2
1
0
5
4
3
7
6
Bit
Initial value
Read/Write
7
PCR6
7
0
W
6
PCR6
6
0
W
5
PCR6
5
0
W
4
PCR6
4
0
W
3
PCR6
3
0
W
0
PCR6
0
0
W
2
PCR6
2
0
W
1
PCR6
1
0
W
Bit
Initial value
Read/Write
7
P6
0
R/W
6
P6
0
R/W
5
P6
0
R/W
4
P6
0
R/W
3
P6
0
R/W
0
P6
0
R/W
2
P6
0
R/W
1
P6
0
R/W
2
1
0
5
4
7
6
3
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