COM20022I 3.3V Rev.C
10 Mbps ARCNET (ANSI
878.1) Controller with
2Kx8 On-Chip RAM
Datasheet
Product Features
Eight, 256 Byte Pages Allow Four Pages TX and
RX Plus Scratch-Pad Memory
New Features
− Data Rates up to 10 Mbps
− Selectable 8/16 Bit Wide Bus With Data Swapper
− Programmable Reconfiguration Times
Next ID Readable
Internal Clock Scaler and Clock Multiplier for
Adjusting Network Speed
48 Pin TQFP Package; Lead-Free RoHS
Compliant package also available
Operating Temperature Range of -40oC to +85oC
Ideal for Industrial/Factory/Building Automation
and Transportation Applications
3.3V power supply with 5V tolerant I/O
Deterministic, (ANSI 878.1), Token Passing
ARCNET Protocol
Supports up to 255 Nodes
Minimal Microcontroller and Media Interface
Logic Required
Supports Various Network Topologies (Star,
Tree, Bus...)
Flexible Interface For Use With All
Microcontrollers or Microprocessors
CMOS, Single +3.3V Supply
Automatically Detects Type of Microcontroller
Interface
Powerful Diagnostics
Self-Reconfiguration Protocol
Duplicate Node ID Detection
Receive All Packets Mode
2Kx8 On-Chip Dual Port RAM
Flexible Media Interface:
Command Chaining for Packet Queuing
− Traditional Hybrid Interface For Long Distances
at 2.5Mbps
− RS485 Differential Driver Interface For Low Cost,
Low Power, High Reliability
Sequential Access to Internal RAM
Software Programmable Node ID
ORDERING INFORMATION
Order Number:
COM20022I3V-HD for 48 pin TQFP package
COM20022I3V-HT for 48 pin, TQFP Lead-Free RoHS Compliant package
SMSC COM20022I 3.3V Rev.C
Page 1
DATASHEET
Revision 03-08-07
