HD64336900G Datasheet, PDF (152/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

9.5.1 Port Control Register 8 (PCR8)
PCR8 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 8.
Initial
Bit
Bit Name Value R/W Description
7 to 5 


Reserved
4
PCR84 0
3
PCR83 0
2
PCR82 0
1
PCR81 0
W
When each of the port 8 pins, P84 to P80, functions as an
W
general I/O port, setting a PCR8 bit to 1 makes the
corresponding pin an output port, while clearing the bit to
W
0 makes the pin an input port.
W
0
PCR80 0
W
9.5.2 Port Data Register 8 (PDR8)
PDR8 is a general I/O port data register of port 8.
Initial
Bit
Bit Name Value R/W Description
7 to 5 
All 0

Reserved
4
P84
0
R/W These bits store output data for port 8 pins.
3
P83
0
2
P82
0
1
P81
0
0
P80
0
R/W If PDR8 is read while PCR8 bits are set to 1, the value
R/W
stored in PDR8 is read. If PDR8 is read while PCR8 bits
are cleared to 0, the pin states are read regardless of the
R/W _{value stored in PDR8.}
R/W
Rev. 1.00, 11/03, page 124 of 376