© 2006 Winbond Electronics Corporation

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Product Brief

December 2006

Revision 1.0

WPCN385L

LPC-to-LPC Switch, Fast Infrared Port, Serial Port and GPIOs

General Description

The WPCN385L, a member of the Winbond LPC SuperI/O

family, is targeted for a wide range of portable applications.

The WPCN385L is PC2001 and ACPI compliant, and fea-

tures an LPC-to-LPC Switch with hot plugability, a Fast Infra-

red port (FIR, IrDA 1.1 compliant), Serial Port and General-

Purpose Input/Output (GPIO) support for a total of 18 ports.

The WPCN385L enables glueless implementation of an

LPC-to-LPC Switch between the motherboard LPC bus and

the Docking Station, and supports hot insertion and hot re-

moval.

Outstanding Features

devices in the Docking Station to be connected to the

Main LPC Bus, thus reducing the number of signals re-

quired through the Docking Station connector

Specification Revision 1.1, August 2002 (supports

CLKRUN and LPCPD signals)

bility

device pins).

bus pins)

LPC Bus

South Bridge

TPM

SIO

Portable

Platform

Docking

Station

Docking LPC Bus

I/O

Ports

EC

DCLKOUT

Serial

Interface

WPCN385L

FIR

Interface

(WPCN8738xU,

8739x)

(WPC876xL)

(WPCT200)

System Block Diagram