COM20019I Datasheet, PDF (1/65 Pages) SMSC Corporation – Low Cost ARCNET(ANSI 878.1) Controller with 2k X 8 On-Board RAM

Product Features
ƒ New Features:
− Data Rates up to 312.5 Kbps
− Programmable Reconfiguration Times
ƒ 28 Pin PLCC and 48 Pin TQFP Packages
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
COM20019I
Low Cost ARCNET
(ANSI 878.1)
Controller with 2K x 8
On-Board RAM
Datasheet
ƒ Eight, 256 Byte Pages Allow Four Pages TX and
RX Plus Scratch-Pad Memory
ƒ Next ID Readable
ƒ Internal Clock Scaler 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:
− RS485 Differential Driver Interface For Low Cost,
Low Power, High Reliability
ORDERING INFORMATION
Order Number(s):
COM20019I-LJP for 28 pin PLCC Package
COM20019I-HD for 48 pin TQFP Package
SMSC COM20019I
Page 1
DATASHEET
Rev. 04-15-05