MB89P147 datasheet(7/38 Pages) FUJITSU

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MB89143A/144A

s PIN DESCRIPTION

(Continued)

Pin no.

Pin name

Circuit type

Function

SDIP*

Main clock oscillator pins

Use a crystal oscillator.

MODA

Operating mode selection pin

Connect directly to VSS in normal operation.

RST

Reset I/O pin

This pin is an N-ch open-drain output type with a pull-up

resistor, and a hysteresis input type. “L” is output from

this pin by an internal reset source.

The internal circuit is initialized by the input of “L”.

This pin is with a noise canceller.

54 to 61

P07/AN7 to

P00/AN0

General-purpose I/O ports

These ports are a hysteresis input type. Also serve as an

analog input.

P17/ADST

General-purpose I/O port

This port is a hysteresis input type. Also serves as an

A/D converter external activation.

47 to 53

P16 to P10

General-purpose I/O ports

These ports are a hysteresis input type.

34, 33

P70/X0A,

P71/X1A

Selectable either general-purpose input ports or the

subclock oscillator pins by the mask option. These ports

are a hysteresis input type when used as general-purpose

input ports.

27,

35 to 37

P23 to P20

General-purpose output ports

38,

P37,

P36

General-purpose I/O ports

These ports are a hysteresis input type.

P35/EC

General-purpose I/O port

This port is a hysteresis input type. Also serves as the

external clock input for the 8/16-bit timer/counter.

P34/SI

General-purpose I/O port

This port is a hysteresis input type. Also serves as the

serial data input for the 8-bit serial interface.

P33/SO

General-purpose I/O port

This port is a hysteresis input type. Also serves as the

serial data output for the 8-bit serial interface.

P32/SCK

General-purpose I/O port

This port is a hysteresis input type. Also serves as the

serial transfer clock for the 8-bit serial interface.

* : DIP-64P-M01

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