HD6473847RHV Datasheet, PDF (235/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 8 I/O Ports
8.6.1 Port Data Register 8 (PDR8)
PDR8 is a register that stores data of port 8.
Initial
Bit
Bit Name Value R/W Description
7 to 1 ⎯
⎯
⎯
Reserved
0
P80
0
R/W If port 8 is read while PCR8 bits are set to 1, the values
stored in PDR8 are read, regardless of the actual pin
states. If port 8 is read while PCR8 bits are cleared to 0,
the pin states are read.
8.6.2 Port Control Register 8 (PCR8)
PCR8 controls whether each of the port 8 pins functions as an input pin or output pin.
Initial
Bit
Bit Name Value R/W Description
7 to 1 ⎯
⎯
W
Reserved
The write value should always be 0.
0
PCR80 0
W
Setting a PCR8 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 PCR8 and in PDR8 are valid
only when the corresponding pin is designated by the
SGS3 to SGS0 bits in LPCR as a general I/O pin.
PCR8 is a write-only register.
Rev. 7.00 Mar. 08, 2010 Page 203 of 510
REJ09B0024-0700