GENERAL DESCRIPTION
●SMSC"s COM20019I 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 flexible microcontroller and media interfaces, eight- page message support, and extended temperature range of the COM20019I make it the only true network controller optimized for use in industrial, embedded, and automotive applications.
●Product Features
●■ New Features:
●■ − Data Rates up to 312.5 Kbps
●■ − Programmable Reconfiguration Times
●■ 28 Pin PLCC and 48 Pin TQFP Packages; Green, Lead-free Packages also Available
●■ 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
●■ Eight, 256 Byte Pages Allow Four Pages TX and RX Plus Scratch-Pad Memory
●■ Next ID Readable
●■ Internal Clock Scaler for Adjusting Network Speed
●■ Operating Temperature Range of -40oC to +85oC
●■ Self-Reconfiguration Protocol
●■ Supports up to 255 Nodes
●■ Supports Various Network Topologies (Star, Tree, Bus...)
●■ CMOS, Single +5V Supply
●■ Duplicate Node ID Detection
●■ Powerful Diagnostics
●■ Receive All Packets Mode
●■ Flexible Media Interface:
● − RS485 Differential Driver Interface For Low Cost, Low Power, High Reliability
