HD64336900G Datasheet, PDF (141/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

9.1.2 Port Control Register 1 (PCR1)
PCR1 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 1.
Initial
Bit
Bit Name Value R/W Description
7
PCR17 0
6


5


4
PCR14 0
3


2


W
When the corresponding pin is designated in PMR1 as a

general I/O pin, setting a PCR1 bit to 1 makes the
corresponding pin an output port, while clearing the bit to

0 makes the pin an input port.
W
Bits 6, 5, and 3 to 0 are reserved.


1

0





9.1.3 Port Data Register 1 (PDR1)
PDR1 is a general I/O port data register of port 1.
Initial
Bit
Bit Name Value R/W Description
7
P17
0
R/W These bits store output data for port 1 pins.
6

1
5

1
4
P14
0
3

1
2

1
1

1
0

1

If PDR1 is read while PCR1 bits are set to 1, the value

stored in PDR1 are read. If PDR1 is read while PCR1 bits
are cleared to 0, the pin states are read regardless of the
R/W _{value stored in PDR1.}

Bits 6, 5, and 3 to 0 are reserved. These bits are always

read as 1.


Rev. 1.00, 11/03, page 113 of 376