COM20020ILJP Datasheet, PDF (1/72 Pages) Microchip Technology – 5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM

COM20020I Rev D
5Mbps ARCNET (ANSI
878.1) Controller with
2K x 8 On-Chip RAM
Product Features
ƒ New Features for Rev. D
− Data Rates up to 5 Mbps
− Programmable Reconfiguration Times
ƒ 28 Pin PLCC and 48 Pin TQFP Packages;
Lead-free RoHS Compliant Packages also
Available
ƒ Ideal for Industrial/Factory/Building
Automation and Transportation Applications
ƒ Deterministic, (ANSI 878.1), Token Passing
ARCNET Protocol
ƒ Minimal Microcontroller and Media Interface
Logic Required
ƒ Flexible Interface For Use With All
Microcontrollers or Microprocessors
ƒ Automatically Detects Type of
Microcontroller Interface
ƒ 2Kx8 On-Chip Dual Port RAM
ƒ Command Chaining for Packet Queuing
ƒ Sequential Access to Internal RAM
ƒ Software Programmable Node ID
Datasheet
ƒ Eight, 256 Byte Pages Allow Four Pages TX
and RX Plus Scratch-Pad Memory
ƒ Next ID Readable
ƒ Internal Clock Scaler and Clock Multiplier for
Adjusting Network Speed
ƒ Operating Temperature Range of -40^oC to
+85^oC
ƒ Self-Reconfiguration Protocol
ƒ Supports up to 255 Nodes
ƒ Supports Various Network Topologies (Star,
Tree, Bus...)
ƒ CMOS, Single +5V Supply
ƒ Duplicate Node ID Detection
ƒ Powerful Diagnostics
ƒ Receive All Packets Mode
ƒ 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
ORDERING INFORMATION
Order Numbers:
COM20020ILJP for 28 pin PLCC package
COM20020I-DZD for 28 pin PLCC lead-free RoHS compliant package
COM20020I-HD for 48 pin TQFP package
COM20020I-HT for 48 pin TQFP lead-free RoHS compliant package
SMSC COM20020I Rev D
Page 1
DATASHEET
Revision 12-05-06