Port Control Register 2 (Pcr2) - Hitachi H8/3664 Hardware Manual

9.3.4

Port Control Register 2 (PCR2)

Bit 7
—
Initial value 0
Read/Write —
PCR2 is an 8-bit register for controlling whether each of the port 1 pins P22 to P20 functions as an
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.
6 5
— —
0 0
— —
4 3
— — PCR22
0 0
— —
2 1
PCR21 PCR20
0 0
W W
0
0
W
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