COM20020 Datasheet | SMSC

FEATURES !" New Features Data Rates up to 5 Mbps Programmable Reconfiguration Times !" 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 C to o +85 C !" Self-Reconfiguration Protocol !" Supports up to 255 Nodes !" Supports Various Network Topologies (Star, Tree, Bus...) !" CMOS, Single +3.3V 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 o !" 24 Pin DIP, 28 Pin PLCC 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 !" mand Chaining for Packet Queuing !" Sequential Access to Internal RAM !" Software Programmable Node ID ORDERING INFORMATION Order Numbers: 20020ILJP3V 28 PLCC Package 20020IP3V 24 DIP Package GENERAL DESCRIPTION SMSC's 20020 is a member of the family of Embedded ARCNET Controllers from Standard Microsystems Corporation. The device is a general purpose munications controller for networking microcontrollers and intelligent peripherals in industrial, automotive, and embedded control environments using an ARCNET protocol engine. The small 24 pin package, flexible microcontroller and media interfaces, eight- page message support, and extended temperature range of the 20020 make it the only true network controller optimized for use in industrial, embedded, and automotive applications. Using an ARCNET protocol engine is the ideal solution for embedded...