hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 276

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 I/O Ports
Port Control Register A (PCRA)
PCRA controls whether each of port A pins PA
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. 7.00 Mar 10, 2005 page 234 of 652
REJ09B0042-0700
Bit
Initial value
Read/Write


7
1


6
1


5
1
3
to PA


4
1
0
functions as an input pin or output pin.
PCRA
W
3
0
3
PCRA
W
2
0
2
PCRA
W
1
0
1
PCRA
W
0
0
0