MB90F347CE datasheet(13/85 Pages) FUJITSU

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MB90340E Series

■ PIN DESCRIPTION

(Continued)

Pin No.

Pin name

I/O

Circuit

type*3

Function

QFP100*1 LQFP100*2

1 to 4

99 to 2

P24 to P27

General purpose I/O pins. The register can be set to select

whether to use a pull-up resistor.In external bus mode, the pin is

enabled as a general-purpose I/O port when the corresponding bit

in the external address output control register (HACR) is 1.

A20 to A23

Output pins of the external address bus. When the corresponding

bit in the external address output control register (HACR) is 0, the

pins are enabled as high address output pins (A20 to A23).

IN0 to IN3

Trigger input pins for input captures.

P30

General purpose I/O pin.The register can be set to select whether

to use a pull-up resistor.

This function is enabled in single-chip mode.

ALE

Address latch enable output pin. This function is enabled when

the external bus is enabled.

IN4

Trigger input pin for input capture.

P31

General purpose I/O pin.The register can be set to select whether

to use a pull-up resistor.

This function is enabled in single-chip mode.

External read strobe output pin. This function is enabled when the

external bus is enabled.

IN5

Trigger input pin for input capture.

P32

General purpose I/O pin. The register can be set to select whether

to use a pull-up resistor. This function is enabled either in single-

chip mode or when the WR/WRL pin output is disabled.

WR / WRL

Write strobe output pin for the external data bus. This function is

enabled when both the external bus and the WR/WRL pin output

are enabled. WRL is used to write-strobe 8 lower bits of the data

bus in 16-bit access while WR is used to write-strobe 8 bits of the

data bus in 8-bit access.

INT10R

External interrupt request input pin.

P33

General purpose I/O pin. The register can be set to select whether

to use a pull-up resistor.This function is enabled either in single-

chip mode or when the WRH pin output is disabled.

WRH

Write strobe output pin for the upper 8 bits of the external data

bus. This function is enabled when the external bus is enabled,

when the external bus 16-bit mode is selected, and when the

WRH output pin is enabled.

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