COM20022I 10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM Datasheet Product Features New Features Eight, 256 Byte Pages Allow Four Pages TX and Data Rates up to 10 Mbps RX Plus Scratch-Pad Memory Selectable 8/16 Bit Wide Bus With Data Swapper Next ID Readable Programmable DMA Channel Programmable Reconfiguration Times Internal Clock Scaler and Clock Multiplier for 48 Pin TQFP Package Lead-Free RoHS Adjusting Network Speed Compliant Package also available o o Operating Temperature Range of -40 C to +85 C Ideal for Industrial/Factory/Building Automation Self-Reconfiguration Protocol and Transportation Applications Supports up to 255 Nodes Deterministic, (ANSI 878.1), Token Passing ARCNET Protocol Supports Various Network Topologies (Star, Tree, Bus...) Minimal Microcontroller and Media Interface Logic Required CMOS, Single +5V Supply Flexible Interface For Use With All Duplicate Node ID Detection Microcontrollers or Microprocessors Powerful Diagnostics Automatically Detects Type of Microcontroller Receive All Packets Mode Interface Flexible Media Interface: 2Kx8 On-Chip Dual Port RAM Traditional Hybrid Interface For Long Distances up Command Chaining for Packet Queuing to Four Miles at 2.5Mbps RS485 Differential Driver Interface For Low Cost, Sequential Access to Internal RAM Low Power, High Reliability Software Programmable Node ID SMSC COM20022I Page 1 Revision 09-27-07 DATASHEET 10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM Datasheet ORDERING INFORMATION Order Numbers: COM20022ITQFP for 48 pin TQFP package COM20022I-HT for 48 pin, TQFP Lead-Free RoHS Compliant package 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright 2007 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC s standard Terms of Sale Agreement dated before the date of your order (theTerms of Sale Agreemen). The product may contain design defects or errors known as anomalies which may cause the product s functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSCs website at