Renesas H8 Series Hardware Manual page 276

Section 8 I/O Ports
Port Control Register A (PCRA)
Bit 7

Initial value 1

Read/Write
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.
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REJ09B0042-0700
6 5 4
  
1 1 1
  
to PA
3
3 2
PCRA PCRA
3 2
0 0
W W
functions as an input pin or output pin.
0
1 0
PCRA PCRA
1 0
0 0
W W