W742E81A データシートの表示（PDF） - Winbond

部品番号

コンポーネント説明

メーカー

W742E81A

4-BIT MICROCONTROLLER

Winbond 

Preliminary W742E81A/W742C81A

4. PIN DESCRIPTION

SYMBOL

XIN2

XOUT2

XIN1

XOUT1

RA0−RA3

RB0−RB3

RC0−RC3

RD0−RD3

RE0−RE3

RF0−RF3

MFP

DTMF

RES

SEG0−SEG39

COM0−COM3

DH1, DH2

VDD1

VDD2

VDD

VSS

I/O

FUNCTION

I Input pin for sub-oscillator.

Connected to 32.768 KHz crystal only.

O Output pin for sub-oscillator with internal oscillation capacitor. Connected

to 32.768 KHz crystal only.

I Input pin for main-oscillator.

Connected to 3.58 MHz or 400 KHz crystal or RC to generate system

clock.

O Output pin for main-oscillator.

Connected to 3.58 MHz or 400 KHz crystal or RC to generate system

clock.

I/O Input/Output port.

Input/output mode specified by port mode 1 register (PM1).

I/O Input/Output port.

Input/output mode specified by port mode 2 register (PM2).

I 4-bit port for input only.

Each pin has an independent interrupt capability.

I/O Input/Output port.

Input/output mode specified by port mode 5 register (PM5).

O Output port only. With high sink current capacity for the LED application.

O Output port only.

Output pin only.

O This pin can output modulating or nonmodulating frequency, or Timer 1

specified frequency. It can be selected by bit 0 of BUZCR (BUZCR.0).

O This pin can output dual-tone multifrequency signal for dialling.

I System reset pin with pull-high resistor.

O LCD segment output pins.

O LCD common signal output pins.

The LCD alternating frequency can be selected by code option.

I Connection terminals for voltage doubler (halver) capacitor.

I Positive (+) supply voltage terminal.

Refer to Functional Description.

I Positive power supply (+).

I Negative power supply (-).

Publication Release Date: April 2000

-5-

Revision A1

Share Link: