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Port C Data Register (PCDR)
Bit
:
PC7DR
Initial value :
R/W
:
R/W
PCDR is an 8-bit readable/writable register that stores output data for the port C pins (PC7 to
PC0).
PCDR is initialized to H'00 by a power-on reset, and in hardware standby mode. It retains its prior
state by a manual reset or in software standby mode.
Port C Register (PORTC)
Bit
:
PC7
Initial value :
R/W
:
Note: * Determined by state of pins PC7 to PC0.
PORTC is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port C pins (PC7 to PC0) must always be performed on PCDR.
If a port C read is performed while PCDDR bits are set to 1, the PCDR values are read. If a port C
read is performed while PCDDR bits are cleared to 0, the pin states are read.
After a power-on reset and in hardware standby mode, PORTC contents are determined by the pin
states, as PCDDR and PCDR are initialized. PORTC retains its prior state by a manual reset or in
software standby mode.
7
6
PC6DR
PC5DR
0
0
R/W
7
6
PC6
—*
—*
R
R
5
4
PC4DR
PC3DR
0
0
R/W
R/W
5
4
PC5
PC4
—*
—*
R
R
3
2
PC2DR
PC1DR
0
0
R/W
R/W
3
2
PC3
PC2
—*
—*
R
R
1
0
PC0DR
0
0
R/W
R/W
1
0
PC1
PC0
—*
—*
R
R
377
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