HD64F2149YV datasheet(266/1075 Pages) RENESAS

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Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 238 of 1044

REJ09B0280-0300

8.9

Port 8

8.9.1

Overview

Port 8 is an 8-bit I/O port. Port 8 pins also function as SCI1 I/O pins (TxD1, RxD1, SCK1), the

IIC1 I/O pin (SCL1), host interface (XBS) I/O pins (

CS2, GA20, HA0, HIFSD), host interface

(LPC) I/O pins (

PME, GA20, CLKRUN, LPCPD), and interrupt input pins (IRQ5 to IRQ3). Port 8

pin functions are the same in all operating modes except host interface function. Figure 8.16

shows the port 8 pin configuration.

P86 (I/O)/

IRQ5 (Input)/SCK1 (I/O)/SCL1 (I/O)

P85 (I/O)/

IRQ4 (Input)/RxD1 (Input)

P84 (I/O)/

IRQ3 (Input)/TxD1 (Output)

P83 (I/O)/

LPCPD (Input)

P82 (I/O)/HIFSD (Input)/

CLKRUN (I/O)

P81 (I/O)/

CS2 (Input)/GA20 (I/O)

P80 (I/O)/HA0 (Input)/

PME (I/O)

Port 8

Port 8 pins

Figure 8.16 Port 8 Pin Functions

8.9.2

Table 8.16 summarizes the port 8 registers.

Table 8.16

Port 8 Registers

Name

Abbreviation

R/W

Initial Value

Address*

Port 8 data direction register

P8DDR

H'80

H'FFBD*

Port 8 data register

P8DR

R/W

H'80

H'FFBF

Notes: 1. Lower 16 bits of the address.

2. P8DDR has the same address as PBPIN.

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