W541E200 データシートの表示（PDF） - Winbond

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W541E200

4-BIT FLASH EPROM MICROCONTROLLER

Winbond 

Preliminary W541E20X

PIN DESCRIPTION

SYMBOL

XIN

XOUT

RA0−RA2,

RA3 (DATA)

RB0−RB3

RC0−RC3

RD0−RD3

RE0/DOUT,

RE1/CLKO,

RE2/DIN,

RE3/CLKI

MFP

INT (MODE)1

RES (VPP)1

VDD

VSS

I/O

FUNCTION

I Input pin for oscillator.

Connected to crystal or resistor to generate system clock by code option.

External 10~20pF capacitor uses to get accurate freq in crystal mode.

O Output pin for oscillator.

Connected to crystal or resistor to generate system clock by code option.

20pF capacitor is built in internal for crystal mode.

I/O Input/Output port.

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

output port, can provide high sink current for driving LED.

I/O Input/Output port.

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

output port, can provide high sink current for driving LED.

I/O Input/Output port.

Input/output mode specified by port mode 4 register (PM4). Each pin has

an independent interrupt capability in input mode.

I/O Input/Output port.

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

I/O Special input/output port.

This port can be configured by software to act as the output of internal

port RT or the serial I/O port. When used as output port, can provide high

sink current for driving LED.

O Output pin only.

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

clock output specified by mode register 1 (MR1).

I External interrupt pin.

This pin must be tied to VDD through an external resistor. It is a low active

and floating input pin.

I System reset pin.

This pin must be tied to VDD through an external resistor when it is not

used to reset this chip. It is a low active and floating input pin.

I Positive power supply (+).

I Negative power supply (-).

Note: There are internal pull-high resistors in these pins of W741C20X.

Publication Release Date: June 2003

-5-

Revision A2

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