COM20020-5 Datasheet, PDF (1/58 Pages) SMSC Corporation – Universal Local Area Network Controller with 2K x 8 On-Board RAM

COM20020-5
COM20020-5 ULANC
Universal Local Area Network Controller
with 2K x 8 On-Board RAM
FEATURES
• 24-Pin Embedded Network Controller/
• Receive All Mode
Transceiver/RAM
• Ideal for Industrial/Factory Automation
and Automotive Applications
• Deterministic, 5 Mbps, Token Passing
ARCNET Protocol
• Data Rates from 5 Mbps to 312.5 Kbps
• 24-Pin DIP or 28-Pin PLCC Package
• Flexible Media Interface:
- RS485 Differential Driver Interface for
Low Cost, Low Power, High Reliability
• Minimal Microcontroller and Media
- Backplane Mode for Direct Connection to
Interfaces
Media in Short Distance Applications
• Flexible Microcontroller Interface for Use
with 80XX, 68XX, etc.
• Eight, 256-Byte Pages Allow 4 Pages TX
and RX Plus Scratch-Pad Memory
• Automatically Detects Type of
• No Wait-State Arbitration
Microcontroller Interface:
-Non-Multiplexed or Multiplexed Bus
-Separate nRD & nWR Lines or DIR &
nDS Lines
• Full 2Kx8 On-Chip RAM
• Command Chaining for Top Performance
• Programmable TXEN Polarity
• Next ID Readable
• Internal Clock Prescaler for Slower Network
Speed without Slowing Arbitration
• Operating Temperature Range of -40^oC to
+85^oC
• Reduced Reconfiguration Times
• Sequential Access to Internal RAM
• Software Programmable Node ID
• Duplicate Node ID Detection
• Self-Reconfiguring Protocol
• Supports up to 255 Nodes
• Supports Various Network Topologies (Star,
Tree, Bus...)
• Powerful Diagnostics
• CMOS, Single +5V Supply
GENERAL DESCRIPTION
SMSC's COM20020-5 is a member of the family pin package, flexible microcontroller and media
of Industrial Network Controllers from Standard interfaces, eight-page message support, and
Microsystems Corporation. The device is a extended temperature range of the COM20020-5
special purpose communications controller for make it the only true network controller
networking microcontrollers and intelligent optimized for use in industrial and automotive
peripherals in industrial, automotive, and applications. Using an ARCNET protocol
embedded control environments using an engine is the ideal solution for factory
ARCNET® protocol engine. The small 24- automation applications because it provides a
token-passing