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COM20022I

10Mbps ARCNET controller with 2Kx8 on-board RAM

SMSC -> Microchip 

GENERAL DESCRIPTION

SMSC's COM20022 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 COM20022 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 COM20022. 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

Mbpsmaximum data rate, and the internal diagnostics make the COM20022 the highest performance

embedded communications device available. With only one COM20022 and one microcontroller, a

complete communications node may be implemented.

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