Hitachi H8S/2670, Reference Manual

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Port C Data Register (PCDR)
Bit 7 6 5 4 3 2 1 0
PC7DR PC6DR PC5DR PC4DR PC3DR PC2DR PC1DR PC0DR
Initial value 0 0 0 0 0 0 0 0
Read/Write R/W R/W R/W R/W R/W R/W 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 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 — * — * — * — * — * — * — * — *
Read/Write R R R R R R R R
Note: * Determined by the state of pins PC7 to PC0.
PORTC is an 8-bit read-only register that shows the pin states. PORTC 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.
Port C MOS Pull-Up Control Register (PCPCR)
Bit 7 6 5 4 3 2 1 0
PC7PCR PC6PCR PC5PCR PC4PCR PC3PCR PC2PCR PC1PCR PC0PCR
Initial value 0 0 0 0 0 0 0 0
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
PCPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port C on a bit-by-bit basis.