GENERAL DESCRIPTION
SMSC's COM20020D 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 24 pin package, flexible microcontroller and media interfaces, eight- page message support, and extended temperature range of the COM20020D 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 5 Mbps when using the COM20020D.

FEATURES
· New Features for Rev. D
- Data Rates up to 5 Mbps
- Programmable Reconfiguration Times
· 24 Pin DIP, 28 Pin PLCC Package
· Ideal for Industrial/Factory/Building Automation and Transportation Applications
· Deterministic, (ANSI 878.1), Token Passing ARCNET Protocol
· Minimal Microcontroller and Media Interface Logic Required
· Flexible Interface For Use With All Microcontrollers or Microprocessors
· Automatically Detects Type of Microcontroller Interface
· 2Kx8 On-Chip Dual Port RAM
· Command Chaining for Packet Queuing
· Sequential Access to Internal RAM
· Software Programmable Node ID