HD64F38024HV Datasheet, PDF (258/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 8 I/O Ports
Port Control Register A (PCRA)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
PCRA ₃ PCRA ₂ PCRA ₁ PCRA ₀
Initial value
1
1
1
1
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
W
W
W
W
PCRA controls whether each of port A pins PA₃ to PA₀ functions as an input pin or output pin.
Setting a PCRA bit to 1 makes the corresponding pin an output pin, while clearing the bit to 0
makes the pin an input pin. PCRA and PDRA settings are valid when the corresponding pins are
designated for general-purpose input/output by LPCR.
Upon reset, PCRA is initialized to H'F0.
PCRA is a write-only register, which is always read as all 1s.
Rev. 8.00 Mar. 09, 2010 Page 236 of 658
REJ09B0042-0800