HD6432646 Hitachi, HD6432646 Datasheet - Page 302

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

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.
Port C MOS Pull-Up Control Register (PCPCR)
PCPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port C on an individual bit basis.
In modes 6 and 7, if PCPCR is set to 1 when the port is in the input state in accordance with the
settings of the LCD driver LPCR and PCDDR, the MOS input pull-up is set to ON.
PCPCR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state by
a manual reset or in software standby mode.
268
Bit
Initial value :
R/W
Bit
Initial value :
R/W
:
:
:
:
PC7PCR PC6PCR PC5PCR PC4PCR PC3PCR PC2PCR PC1PCR PC0PCR
PC7
R/W
—*
7
R
7
0
PC6
R/W
—*
6
R
6
0
PC5
R/W
—*
5
R
5
0
PC4
R/W
—*
4
R
4
0
PC3
R/W
—*
3
R
3
0
PC2
R/W
—*
2
R
2
0
PC1
R/W
—*
1
R
1
0
PC0
R/W
—*
0
R
0
0