SH7670 Datasheet, PDF (1037/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 23 Pin Function Controller (PFC)
23.1.5 Port C I/O Registers H and L (PCIORH, PCIORL)
PCIORH and PCIORL are 16-bit readable/writable registers that select the input/output direction
for the port C pins. Bits PC20IOR to PC0IOR correspond to pins PC20 to PC00 (multiplexed pin
names other than port names are omitted), respectively. PCIORH is enabled when the function of
the port C pins is set to general-purpose I/O (PC20 to PC16), and is disabled in other cases.
PCIORL is enabled when the function of the port C pins is set to general-purpose I/O (PC15 to
PC00), and is disabled in other cases.
When a bit in PCIORH and PCIORL is set to 1, the corresponding pin is set to output, and when
set to 0, the pin is set to input.
Bits 15 to 5 in PCIORH are reserved. These bits are always read as 0. The write value should
always be 0.
The initial value of PCIORH and PCIORL is H'0000.
Rev. 1.00 Nov. 14, 2007 Page 1011 of 1262
REJ09B0437-0100