COM20020i

Microchip's COM20020ID 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 28 pin package, flexible microcontroller and media interfaces, eight-page message support, and extended temperature range of the COM20020ID 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 COM20020ID.

A token-passing protocol provides predictable response times because each network event occurs within a predetermined time interval, based upon the number of nodes on the network. The deterministic nature of ARCNET is essential in real time applications. The integration of the 2Kx8 RAM buffer on chip, the Command Chaining feature, the 5 Mbps maximum data rate, and the internal diagnostics make the COM20020ID the highest performance embedded communications device available. With only one COM20020ID and one microcontroller, a complete communications node may be implemented.

SOHARD ARCNET Analyzer "SH ARCALYZER-USB" (PCMCIA also available) by clicking this .

Features
  • New Features for Rev. D Data Rates up to 5 Mbps Programmable Reconfiguration Times
  • Data Rates up to 5 Mbps
  • Programmable Reconfiguration Times
  • 28 Pin PLCC and 48 Pin TQFP RoHS Compliant 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
  • 2K x 8 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 and Clock Multiplier for Adjusting Network Speed
  • Operating Temperature Range of -40°C to +85°C
  • 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: Traditional Hybrid Interface for Long Distances up to Four Miles at 2.5 Mbps RS485 Differential Driver Interface for Low Cost, Low Power, High Reliability
  • Traditional Hybrid Interface for Long Distances up to Four Miles at 2.5 Mbps
  • RS485 Differential Driver Interface for Low Cost, Low Power, High Reliability
Parameter
Parameter Name Value Value
Standalone Arcnet Cntrl N/A N/A
MAC Yes Yes
TX/RX RAM Buffer(Bytes) 16K 16K
Deterministic Protocola (Token Passing) Yes Yes
Operating Voltage (V) 5V 5V
Max Speed (MHz) 5 Mbps 5 Mbps
Interface RS485 RS485
Temp Range Min (°C) -40 -40
Temp Range Max (°C) 85 85
Comments +5V Arcnet Controller with On-Chip-RAM +5V Arcnet Controller with On-Chip-RAM
Documents
COM20020i Rev. D 5 Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAMData Sheets12/06/2006406KB
AN142_SMSC - Design Guidelines for Connecting the ARCNET Product Family, COM20019/20/22, with Renesas Technology's SH Series MicrocontrollersAppNote12/06/2005229KB
TN71_SMSC - ARCNET Cable Length vs. Number of Nodes for the HYC9088 in Coaxial Bus Topology (May 1991)AppNote04/30/1991120KB
TN75_SMSC - RS485 Cabling Guidelines for the COM20020 Universal Area Network Controller (ULANC) and Experimental Procedure for VerificationAppNote04/30/1994174KB
ARCNET MAC Layer Performance Calculator UtilitySoftware02/08/199638KB
Demo Software for EVB-PC20020Software02/07/199690KB
ODI Drivers for NetWare 3.x (CLIENT and SERVER)Software02/08/199672KB
PAL for the RS-485 Transceiver for the EVB-PC20020 & EVB-20051Software02/08/19966KB
Windows 98 ARCNET NDIS 4.0 driver 1.1Software11/08/199913KB
Windows CE v2.1x Driver (Version 1.0)Software10/05/199957KB
Windows NT and 95 ARCNET NDIS Miniport v3.x and 4.0 v1.1 (Replaces com20020.zip)Software11/08/1999114KB
EVB-PC20020 ISA Bus PAL JEDEC FileEvaluation Boards05/06/19922KB
COM20020i Rev. D 5 Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAMProduct Briefs12/06/200676KB
EVB-20020 Evaluation Board Schematic, PDFSchematics11/18/199865KB
EVB-20020 User's ManualUser Guides01/18/2000179KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
COM20020I-DZD28PLCC-40C to +85CTUBE19.2316.0214.5614.0713.91
COM20020I-HT48TQFP-40C to +85CTRAY**********
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COM20022i3.3V$15.93
HYC9088A
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TMC2072
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RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
COM20020I-DZD-TR1.1425001.73333328PLCC11.5x11.5x4.3Matte Tine3
COM20020I-DZD1.1425000.43589728PLCC11.5x11.5x4.3Matte Tine3
COM20020I3V-DZD-TR1.1425001.73333328PLCC11.5x11.5x4.3Matte Tine3
COM20020I3V-DZD1.1425000.43589728PLCC11.5x11.5x4.3Matte Tine3
COM20020I-HT0.1763000.76000048TQFP7x7x1.4Matte Tine3
COM20020I3V-HT0.1763000.76000048TQFP7x7x1.4Matte Tine3
COM20020i Rev. D 5 Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM COM20020i
AN142_SMSC COM20022I3.3V
TN71_SMSC HYC9088A
TN75_SMSC HYC9088A
ARCNET MAC Layer Performance Calculator Utility COM20022I3.3V
Demo Software for EVB-PC20020 COM20022I3.3V
ODI Drivers for NetWare 3.x (CLIENT and SERVER) COM20022I3.3V
PAL for the RS-485 Transceiver for the EVB-PC20020 & EVB-20051 COM20022I3.3V
Windows CE v2.1x Driver (Version 1.0) COM20022I3.3V
COM20020i Rev. D 5 Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM COM20020i
EVB-20020 Evaluation Board Schematic, PDF COM20020i
EVB-20020 User's Manual COM20020i
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