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MB90860E

16-bit Proprietary Microcontroller

Fujitsu 

MB90860E Series

■ PIN DESCRIPTION

Pin No.

I/O

Pin name Circuit

QFP100*1 LQFP100*2

type*3

Function

1 to 4

P24 to P27

99 to 2

A20 to A23

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.

G 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 0 to 3.

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

P30

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

mode.

5

3

ALE

G Address latch enable output pin. This function is enabled when

the external bus is enabled.

IN4

Trigger input pin for input capture 4.

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

P31

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

mode.

6

4

RD

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

external bus is enabled.

IN5

Trigger input pin for input capture 5.

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

P32

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

chip mode or with the WR/WRL pin output disabled.

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

7

5

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

WR / WRL

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 (sub) .

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

P33

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

chip mode or with the WRH pin output disabled.

8

6

G Write strobe output pin for the 8 higher bits of the external data

WRH

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.

(Continued)

10

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