HD6432138SW datasheet(288/1061 Pages) RENESAS

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Section 8 I/O Ports

Rev. 4.00 Jun 06, 2006 page 234 of 1004

REJ09B0301-0400

8.10

Port 9

8.10.1

Overview

Port 9 is an 8-bit I/O port. Port 9 pins also function as external interrupt input pins (

IRQ0 to

IRQ2), the A/D converter external trigger input pin (ADTRG), host interface input pins (ECS2,

CS1, IOW, IOR) (H8S/2138 Group only), the IIC0 I/O pin (SDA0) (option in H8S/2138 Group

only), the subclock input pin (EXCL), bus control signal I/O pins (

AS/IOS, RD, WR, WAIT), and

the system clock (

φ) output pin. In the H8S/2138 Group, P97 is an NMOS push-pull output. SDA0

is an NMOS open-drain output, and has direct bus drive capability.

Figure 8.17 shows the port 9 pin configuration.

P97/

WAIT/SDA0

P96/

φ/EXCL

P95/

AS/IOS/CS1

P94/

WR/IOW

P93/

RD/IOR

P92/

IRQ0

P91/

IRQ1

P90/

IRQ2/ADTRG/ECS2

Port 9

Port 9 pins

WAIT (Input)/P97 (I/O)/SDA0 (I/O)

φ (Output)/P96 (Input)/EXCL (Input)

AS (Output)/IOS (Output)

WR (Output)

RD (Output)

P92 (I/O)/

IRQ0 (Input)

P91 (I/O)/

IRQ1 (Input)

P90 (I/O)/

IRQ2 (Input)/ADTRG (Input)

Pin functions in modes 1, 2 and 3 (EXPE = 1)

P97 (I/O)/SDA0 (I/O)

P96 (Input)/

φ (Output)/EXCL (Input)

P95 (I/O)/

CS1 (Input)

P94 (I/O)/

IOW (Input)

P93 (I/O)/

IOR (Input)

P92 (I/O)/

IRQ0 (Input)

P91 (I/O)/

IRQ1 (Input)

P90 (I/O)/

IRQ2 (Input)/ADTRG (Input)/ECS2 (Input)

Pin functions in modes 2 and 3 (EXPE = 0)

Figure 8.17 Port 9 Pin Functions

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