W81E381D datasheet(8/63 Pages) WINBOND

Part #	W81E381D

Description	FULL SPEED USB INTEGRATED MICROCONTROLLER

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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W81E381D/W81E381AD

Publication Release Date: January 2002

- 8 -

Revision 0.52

3.1.1 48- pin LQFP package description

SYMBOL

TYPE PIN NO

DESCRIPTIONS

U

US

SB

B P

Piin

ns

s

AVDD

PWR

1

Analog 5V power supply

AVSS

PWR

2

Analog 5V power ground

V33

PWR

5

USB DC power 3.3V output.

D+

I/O

3

USB signal (+)

D-

I/O

4

USB signal (-)

XTALI

I

36

Crystal input. Use 6M Hz crystal. A 6 MHz clock source may also be

used.

XTALO

O

37

Crystal output.

E

Ex

xttrra

a P

Piin

ns

s

PLLEN

I

27

PLL enable pin; Schmitt-trigger pull up input

u

uC

C P

Piin

ns

s

RVED1-3

X

21,41,

48

Reserved pins. Leave these pins floating.

RST

I L

29

RESET: A high on this pin for two machine cycles while the oscillator is

running resets the device.

P0.0

−P0.7

I/O D

46,47,

8,9,

15,16,

17,18

PORT 0: Function is the same as that of the standard 8052.

P1.0

I/O

10

It is a high drive I/O pad. Used as a GPIO pin for memory-type SC

P1.1

I/O

11

It is a high drive I/O pad. Used as a GPIO pin for memory-type SC

P1.2

I/O

12

Used as a GPIO pin for memory-type SC

P1.3

I/O

13

Used as a GPIO pin for memory-type SC

P1.4

I/O

14

Used as a GPIO pin for memory-type SC

P1.5

I/O

22

Used as a GPIO pin for memory-type SC

P1.6

I/O

25

GPIO & remote wakeup pin

P1.7

I/O

26

GPIO & external interrupt pin

P2.2

I/O H

28

It’s a bi-directional I/O port with internal pull-ups. It can be programmed

to be an output-latched port like an on-chip 74373, or a buffer input

port like an on-chip 74244.

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