Port 8; Port 8 Data Direction Register (P8Ddr) - Renesas H8S Series Hardware Manual

8.8

Port 8

Port 8 is a 7-bit I/O port. Port 8 pins also function as the interrupt input pins, SCI_1 and IIC_1
input/output pins, and LPC input/output pin. The output format for P86 and SCK1 is NMOS push-
pull output. The output format for SCL1 is NMOS open-drain output.

• Port 8 data direction register (P8DDR)

• Port 8 data register (P8DR)
8.8.1 Port 8 Data Direction Register (P8DDR)
The individual bits of P8DDR specify input or output for the pins of port 8.
Bit Bit Name

7
6 P86DDR
5 P85DDR
4 P84DDR
3 P83DDR
2 P82DDR
1 P81DDR
0 P80DDR
Initial Value R/W

Undefined
0 W
0 W
0 W
0 W
0 W
0 W
0 W
Description
Reserved
This bit cannot be modified.
If port 8 pins are specified for use as the general
I/O port, the corresponding port 8 pins are output
ports when the P8DDR bits are set to 1, and input
ports when cleared to 0.
Rev. 3.00 Jul. 14, 2005 Page 191 of 986
Section 8 I/O Ports
REJ09B0098-0300