SH7606 Datasheet, PDF (394/532 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7606 Series

Section 15 I/O Ports
15.3.1 Register Description
Port C is a 21-bit I/O port that has the following registers. For details on the addresses of these
registers and the states of these registers in each processing state, see section 18, List of Registers.
• Port C data register H (PCDRH)
• Port C data register L (PCDRL)
15.3.2 Port C Data Registers H and L (PCDRH and PCDRL)
PCDRH and PCDRL are 16-bit readable/writable registers that stores data for port C. Bits
PC20DR to PC0DR correspond to pins PC20 to PC00. (Description of multiplexed functions is
omitted.)
When the pin function is general output port, if the value is written to PCDRH or PCDRL, the
value is output from the pin; if PCDRH or PCDRL is read, the value written to the register is
directly read regardless of the pin state.
When the pin function is general input port, not the value of register but pin state is directly read if
PCDRH or PCDRL is read. Data can be written to PCDRH or PCDRL but no effect on the pin
state. Table 15.3 shows the reading/writing function of the port C data registers H and L.
• PCDRH
Initial
Bit Bit Name Value R/W Description
15 to 5 
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
4
PC20DR 0
R/W See table 15.3.
3
PC19DR 0
R/W
2
PC18DR 0
R/W
1
PC17DR 0
R/W
0
PC16DR 0
R/W
Rev. 4.00 Sep. 13, 2007 Page 368 of 502
REJ09B0239-0400