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LPC47N252-SD

Advanced Notebook I/O Controller with On-Board FLASH

SMSC -> Microchip 

GENERAL DESCRIPTION

The LPC47N252 is a 208-pin 3.3V LPC-based ACPI 1.1 and PC99/PC2001 compliant Notebook I/O Controller with

Fast Infrared for mobile applications.

The LPC47N252 incorporates a high-performance 8051-based keyboard controller; a 64k byte internal Flash ROM,

four PS/2 ports; a real-time clock; SMSC's true CMOS 765B floppy disk controller with advanced digital data

separator and 16-byte data FIFO; an NS16C550A-compatible UART, SMSC’s advanced Infrared Communications

Controller (IrCC 2.0) with a UART and a Synchronous Communications Engine to provide IrDA v1.1 (Fast IR)

capabilities; one Multi-Mode parallel port with ChiProtect circuitry plus EPP and ECP support; two 8584-style Access

Bus controllers with two Sets of Dedicated Pins per ACCESS.Bus Controller; a Serial IRQ peripheral agent interface;

an ACPI Embedded Controller Interface; General Purpose I/O pins including eight pass through ports; three

independently programmable pulse width modulators; two-floppy direct drive support; and maskable hardware wake-

up events. The true CMOS 765B core provides 100% compatibility with IBM PC/XT and PC/AT architectures in

addition to providing data overflow and underflow protection. The SMSC advanced digital data separator incorporates

SMSC's patented data separator technology, allowing for ease of testing and use. The parallel port is compatible

with IBM PC/AT architecture, as well as EPP and ECP. The 8051 controller can also take control of the parallel port

interface to provide remote diagnostics or “Flashing” of the Flash memory.

The LPC47N252 has three separate power planes to provide “instant on” and system power management functions.

Additionally, the LPC47N252 incorporates sophisticated power control circuitry (PCC). The PCC supports multiple

low power down modes. Wake-up events and ACPI-related functions are supported through the SCI Interface.

The LPC47N252’s configuration register set is compatible with the ISA Plug-and-Play Standard (Version 1.0a) and

provides the functionality to support Windows '95.The legacy host Super I/O Configuration and Alternate Super I/O

Configuration decode ranges comply with the Low Pin Count Interface Specification, Revision 1.0. Through internal

configuration registers, each of the LPC47N252's logical device's I/O address, DMA channel and IRQ channel may

be programmed. There are 480 I/O address location options, 15 IRQ options, and four DMA channel options for each

logical device.

The LPC47N252 does not require any external filter components and is, therefore, easy to use and offers lower

system cost and reduced board area. The LPC47N252 is software and register compatible with SMSC's proprietary

82077AA core.

© STANDARD MICROSYSTEMS CORPORATION (SMSC) 2000

80 Arkay Drive

Hauppauge, NY 11788

(631) 435-6000

FAX (631) 273-3123

Standard Microsystems is a registered trademark of Standard Microsystems Corporation, and SMSC, ChiProtect, Ultra I/O and Multi-Mode are

trademarks of Standard Microsystems Corporation. Product names and company names are the trademarks of their respective holders. Circuit

diagrams utilizing SMSC products are included as a means of illustrating typical applications; consequently complete information sufficient for

construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is

assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact

your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to

the purchaser of the semiconductor devices described any licenses under the patent rights of SMSC or others. All sales are expressly conditional on

your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of

your order (the "Terms of Sale Agreement"). The product may contain design defects or errors known as anomalies which may cause the product's

functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended,

authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe

property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the

risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s

website at http://www.smsc.com.

SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES

OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT, AND ANY AND ALL

WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE.

IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES,

OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON

CONTRACT, TORT, NEGLIGENCE OF SMSC OR OTHERS, STRICT LIABILITY, BREACH OF WARRANTY, OR OTHERWISE; WHETHER OR

NOT ANY REMEDY IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE; AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE

POSSIBILITY OF SUCH DAMAGES.

SMSC DB – LPC47N252

Page 3

Rev. 10/27/2000

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