HD6432138SW datasheet(249/1061 Pages) RENESAS

249 / 1061 page

Section 8 I/O Ports

Rev. 4.00 Jun 06, 2006 page 195 of 1004

REJ09B0301-0400

Expanded Modes

Single-Chip Mode

Port

Description

Pins

Mode 1

Mode 2, Mode 3

(EXPE = 1)

Mode 2, Mode 3

(EXPE = 0)

P97/

WAIT

I/O port also functioning as

expanded data bus control input

(

WAIT)

I/O port

P96/

φ/EXCL

When DDR =

0: input port or

EXCL input

When DDR =

1 (after reset):

φ output

When DDR = 0 (after reset): input port or EXCL

input

When DDR = 1:

φ output

P95/

AS/IOS

P94/

P93/

Expanded data bus control

output(

AS/IOS, WR, RD)

I/O port

P92/

IRQ0

P91/

IRQ1

I/O port also functioning as external interrupt input (

IRQ0, IRQ1)

Port 9 • 8-bit I/O port

P90/

IRQ2/

ADTRG

I/O port also functioning as external

interrupt input (

IRQ2), and A/D

converter external trigger input

(

ADTRG)

I/O port also functioning

as external interrupt input

(

IRQ2) and A/D converter

external trigger input

(

ADTRG)

8.2

Port 1

8.2.1

Overview

Port 1 is an 8-bit I/O port. Port 1 pins also function as address bus output pins (A7 to A0), and as

8-bit PWM output pins (PW7 to PW0) (H8S/2138 Group only). Port 1 functions change according

to the operating mode. Port 1 has an on-chip MOS input pull-up function that can be controlled by

software.

Figure 8.1 shows the port 1 pin configuration.

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