h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 298

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 9 I/O Ports
Port C Data Register (PCDR)
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)
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.
Reading a pin being used as an LCD driver returns an undefined value.
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 Sep 22, 2005 page 272 of 1136
REJ09B0257-0500
Bit
Initial value :
R/W
Bit
Initial value :
R/W
:
:
:
:
PC7DR
R/W
PC7
— *
R
7
0
7
PC6DR
R/W
PC6
— *
R
6
0
6
PC5DR
R/W
PC5
— *
R
5
0
5
PC4DR
R/W
PC4
— *
R
4
0
4
PC3DR
R/W
PC3
— *
R
3
0
3
PC2DR
R/W
PC2
— *
R
2
0
2
PC1DR
R/W
PC1
— *
R
1
0
1
PC0DR
R/W
PC0
— *
R
0
0
0