hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 183

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

2. 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 always reads all 1s.
168
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
R/W
3
0
3
PCRA
R/W
2
0
2
PCRA
R/W
1
0
1
PCRA
R/W
0
0
0