H8S-2626 Datasheet, PDF (285/1069 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer

Section 9 I/O Ports
Port C Data Register (PCDR)
Bit
:
Initial value :
R/W
:
7
PC7DR
0
R/W
6
PC6DR
0
R/W
5
PC5DR
0
R/W
4
PC4DR
0
R/W
3
PC3DR
0
R/W
2
PC2DR
0
R/W
1
PC1DR
0
R/W
0
PC0DR
0
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 reset, and in hardware standby mode. It retains its prior state in
software standby mode.
Port C Register (PORTC)
Bit
:7
6
5
4
3
2
1
0
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Initial value : —*
—*
—*
—*
—*
—*
—*
—*
R/W
:R
R
R
R
R
R
R
R
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 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 in software standby mode.
Rev. 5.00 Jan 10, 2006 page 261 of 1042
REJ09B0275-0500