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COM20020I 3.3V
5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
Features
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New Features
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Data Rates up to 5 Mbps |
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Programmable Reconfiguration Times |
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28 Pin PLCC and 48 Pin TQFP Packages; Lead-Free RoHS Compliant Packages Also Available |
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Ideal for Industrial/Factory/Building Automation
and Transportation Applications |
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Deterministic (ANSI 878.1)Token Passing ARCNET
Protocol |
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Minimal Microcontroller and Media Interface
Logic Required |
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Flexible Interface for Use with All Microcontrollers
or Microprocessors |
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Automatically Detects Type of Microcontroller
Interface |
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2K x 8 On-Chip Dual Port RAM |
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Command Chaining for Packet Queuing |
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Sequential Access to Internal RAM |
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Software Programmable Node ID |
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Eight 256 Byte Pages Allow Four Pages TX
and RX Plus Scratch-Pad Memory |
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Next ID Readable |
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Internal Clock Scaler and Clock Multiplier
for Adjusting Network Speed |
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Operating Temperature Range of -40°C
to +85°C |
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Self-Reconfiguration Protocol |
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Supports up to 255 Nodes |
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Supports Various Network Topologies (Star,
Tree, Bus...) |
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CMOS, Single +3.3V Supply |
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Duplicate Node ID Detection |
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Powerful Diagnostics |
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Receive All Packets Mode |
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Flexible Media Interface:
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Traditional Hybrid Interface for
Long Distances up to Four Miles at 2.5 Mbps |
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RS485 Differential Driver Interface
for Low Cost, Low Power, High Reliability |
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ORDERING INFORMATION
Order Numbers:
COM20020I 3VLJP for 28 Pin PLCC* Package
COM20020I 3V-DZD for 28 Pin PLCC* Lead-Free RoHS Compliant Package
COM20020I 3V-HD for 48 Pin TQFP Package
COM20020I 3V-HT for 48 Pin TQFP Lead-Free RoHS Compliant Package
*TQFP package is recommended for new design |
General Description
SMSC's COM20020I 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 package,
flexible microcontroller and media interfaces, eight-page message
support, and extended temperature range of the COM20020I 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 COM20020I.
 COM20020I 3V Data Sheet, Application Notes,
Drivers and Design Tools
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