H8S20103 Datasheet, PDF (345/992 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family / H8S/Tiny Series

Section 10 I/O Ports
10.8.10 Port Control Register A (PCRA)
Address: H'FFFFF9
Bit:
b7
PCRA7
Value after reset:
0
b6
PCRA6
0
b5
PCRA5
0
b4
PCRA4
0
b3
PCRA3
0
b2
PCRA2
0
b1
PCRA1
0
b0
PCRA0
0
Bit Symbol
7 PCRA7
6 PCRA6
5 PCRA5
4 PCRA4
3 PCRA3
2 PCRA2
1 PCRA1
0 PCRA0
Bit Name
Description
R/W
Port A7 control
Port A6 control
Port A5 control
Port A4 control
Port A3 control
Port A2 control
Port A1 control
Port A0 control
0: When the corresponding pin is designated as a R/W
general I/O port, the pin functions as an input
R/W
port.
R/W
1: When the corresponding pin is designated as a
general I/O port, the pin functions as an output ^R/W
port.
R/W
PCRA is a register that selects inputs/outputs in bit _R/W
units for pins to be used as general I/O ports of port
A.
R/W
R/W
• PCRA7 bit to PCRA0 bit (port A7 to A0 control)
When the corresponding pin is designated in PMRA as a general I/O pin, setting a PCRA bit to
1 makes the corresponding pin an output port, while clearing the bit to 0 makes the pin an
input port.
Rev. 1.00 Oct. 03, 2008 Page 319 of 962
REJ09B0465-0100