HD64F2149YV datasheet(271/1075 Pages) RENESAS

271 / 1075 page

Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 243 of 1044

REJ09B0280-0300

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 (XBS) input pins

(

ECS2, CS1, IOW, IOR), the IIC0 I/O pin (SDA0), the subclock input pin (EXCL), bus control

signal I/O pins (

AS/IOS, RD, HWR, LWR, WAIT), and the system clock (φ) output pin. 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/

HWR/IOW

P93/

RD/IOR

P92/

IRQ0

P91/

IRQ1

P90/

LWR/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)

HWR (Output)

RD (Output)

P92 (I/O)/

IRQ0 (Input)

P91 (I/O)/

IRQ1 (Input)

P90 (I/O)/

LWR (Output)/IRQ2 (Input)/ADTRG (Input)

Pin functions in modes 1 to 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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