COM200221 datasheet(6/82 Pages) SMSC

6 / 82 page

10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM

Datasheet

Revision 09-27-07

Page 6

SMSC COM20022I

DATASHEET

Chapter 1

General Description

SMSC's COM20022I is a member of the family of Embedded ARCNET Controllers from Standard

Microsystems Corporation. The device is a general purpose communications controller for networking

microcontrollers and intelligent peripherals in industrial, automotive, and embedded control environments

using an ARCNET protocol engine.

The small 48 pin package, flexible microcontroller and media

interfaces, eight- page message support, and extended temperature range of the COM20022I make it the

only true network controller optimized for use in industrial, embedded, and automotive applications. Using

an ARCNET protocol engine is the ideal solution for embedded control applications because it provides a

deterministic token-passing protocol, a highly reliable and proven networking scheme, and a data rate of

up to 10 Mbps when using the COM20022I. A token-passing protocol provides predictable response times

because each network event occurs within a predetermined time interval, based upon the number of

nodes on the network. The deterministic nature of ARCNET is essential in real time applications. The

integration of the 2Kx8 RAM buffer on-chip, the Command Chaining feature, the 10 Mbps maximum data

rate, and the internal diagnostics make the COM20022I the highest performance embedded

communications device available. With only one COM20022I and one microcontroller, a complete

communications node may be implemented.

COM200221 датащи(PDF) 6 Page - SMSC Corporation