COM20020
COM20020 ULANC
Universal Local Area Network Controller
with 2K x 8
FEATURES
∙
∙Ideal for Industrial/Factory Automation and Automotive Applications
∙Deterministic, 2.5 Mbps, Token Passing ARCNET Protocol
∙Minimal Microcontroller and Media Interface Logic Required
∙Flexible Microcontroller Interface for Use with 80XX, 68XX, etc.
∙Automatically Detects Type of Microcontroller Interface:
-
-Separate nRD & nWR Lines or DIR & nDS Lines
∙Full 2Kx8
∙Command Chaining for Top Performance
∙Reduced Reconfiguration Times
∙Sequential Access to Internal RAM
∙Software Programmable Node ID
∙Duplicate Node ID Detection
∙Powerful Diagnostics
∙Receive All Mode
∙Data Rates from 2.5 Mbps to 156.25 Kbps
∙
∙Flexible Media Interface:
-Traditional Hybrid Interface for Long Distances
-RS485 Differential Driver Interface for Low Cost, Low Power, High Reliability
-Backplane Mode for Direct Connection to Media in Short Distance Applications
∙Eight,
∙No
∙Programmable TXEN Polarity
∙Next ID Readable
∙Internal Clock Prescaler for Slower Network Speed without Slowing Arbitration
∙Operating Temperature Range of
∙
∙Supports up to 255 Nodes
∙Supports Various Network Topologies (Star, Tree, Bus...)
∙CMOS, Single +5V Supply
GENERAL DESCRIPTION
SMSC's COM20020 is a member of the family of Industrial Network Controllers from Standard Microsystems Corporation. The device is a special purpose communications controller for networking microcontrollers and intelligent peripherals in industrial, automotive, and
embedded control environments using an ARCNET® protocol engine. The small
make it the only true network
