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WPCN381U_0DG

Legacy-Reduced SuperI/O with Fast Infrared Port, Two Serial Ports and GPIOs

Winbond 

Product Brief

December 2006

Revision 1.0

WPCN381U

Legacy-Reduced SuperI/O with Fast Infrared Port, Two Serial

Ports and GPIOs

General Description

The WPCN381U, a member of the Winbond LPC SuperI/O

family, is targeted for legacy-reduced ultra-light portable ap-

plications. The WPCN381U is PC2001 and ACPI compliant,

and features a Fast Infrared port (FIR, IrDA 1.1 compliant),

two Serial Ports and General-Purpose Input/Output (GPIO)

support for a total of 11 ports.

The WPCN381U is a “no-frills” solution for the new generation

of notebook systems, providing just the essential functions.

Outstanding Features

■ Pin and software compatible with the Winbond 87381

■ Fast Infrared Port (FIR)

■ Two Serial Ports

■ LPC bus interface, based on Intel’s LPC Interface

Specification Revision 1.1, August 2002 (supports

CLKRUN and LPCPD signals)

■ PC2001 and ACPI Revision 3.0 compliant

■ 11 GPIO ports, including 6 with IRQ assertion capabil-

ity

■ Two testability modes (XOR Tree and TRI-STATE®

device pins).

■ 5V tolerant and back-drive protected pins (except LPC

bus pins)

■ 48-pin LQFP package

System Block Diagram

South Bridge

I/O

Ports

LPC Bus

WPCN381U

TPM

(WPCT200)

EC

(WPC876xL)

Serial

Interface

FIR/Serial

Interface

Portable

Platform

© 2006 Winbond Electronics Corporation

www.winbond.com

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