COM20019(2000) Ver la hoja de datos (PDF) - SMSC -> Microchip

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COM20019
(Rev.:2000)

Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8 On-Board RAM

SMSC -> Microchip 

COM20019

Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8

On-Board RAM

FEATURES

• New Features

- Data Rates up to 312.5 Kbps

- Programmable Reconfiguration Times

• 24 Pin DIP, 28 Pin PLCC, 48 Pin TQFP

Packages

• 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

GENERAL DESCRIPTION

SMSC's COM20019 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 COM20019

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

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