HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 188

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Port Control Register 2 (PCR2)
PCR2 is an 8-bit register for controlling whether each of the port 1 pins P2
input pin or output pin. Setting a PCR2 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. The settings in PCR2 and PDR2 are valid only
when the corresponding pin is designated in SCR3 as a general I/O pin.
Upon reset, PCR2 is initialized to H'00.
PCR2 is a write-only register, which is always read as all 1s.
180
Bit
Initial value
Read/Write
—
—
7
0
—
—
6
0
—
—
5
0
—
—
4
0
—
—
3
0
PCR2
W
2
0
2
2
to P2
PCR2
0
W
functions as an
1
0
1
PCR2
W
0
0
0