COM20022I Datasheet, PDF (1/83 Pages) SMSC Corporation – 10 MBPS ARCNET CONTROLLER WITH 2KX8 ON BOARD RAM

Product Features
New Features
− Data Rates up to 10 Mbps
− Selectable 8/16 Bit Wide Bus With Data Swapper
− Programmable DMA Channel
− Programmable Reconfiguration Times
− 48 Pin TQFP Package
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
2Kx8 On-Chip Dual Port RAM
Command Chaining for Packet Queuing
Sequential Access to Internal RAM
Software Programmable Node ID
COM20022I
10 Mbps ARCNET
(ANSI 878.1) Controller
with 2Kx8 On-Board
RAM
Datasheet
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^oC to +85^oC
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 2.5Mbps
− RS485 Differential Driver Interface For Low Cost,
Low Power, High Reliability
SMSC COM20022I
Page 1
DATASHEET
Rev. 08-18-03