SH7058 Datasheet, PDF (798/1130 Pages) Renesas Technology Corp – Renesas SuperHTM RISC engine

21.3.6 Port C IO Register (PCIOR)
Bit: 15
14
13
12
11
10
9
8
—
—
—
—
—
—
—
—
Initial value: 0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R
R
R
Bit: 7
6
5
4
3
2
1
0
—
—
— PC4IOR PC3IOR PC2IOR PC1IOR PC0IOR
Initial value: 0
0
0
0
0
0
0
0
R/W: R
R
R
R/W R/W R/W R/W R/W
The port C IO register (PCIOR) is a 16-bit readable/writable register that selects the input/output
direction of the five pins in port C. Bits PC4IOR to PC0IOR correspond to pins PC4/IRQ0 to
PC0/TxD1. PCIOR is enabled when port C pins function as general input/output pins (PC4 to
PC0), and disabled otherwise.
When port C pins function as PC4 to PC0, a pin becomes an output when the corresponding bit in
PCIOR is set to 1, and an input when the bit is cleared to 0.
PCIOR is initialized to H'0000 by a power-on reset (excluding a WDT power-on reset), and in
hardware standby mode. It is not initialized in software standby mode or sleep mode.
Rev. 3.0, 09/04, page 757 of 1086