GENERAL DESCRIPTION

The COM20051I is a low-cost, highly-integrated microcontroller incorporating a high-performance network controller based on the ARCNET Token Bus Standard (ANSI 878.1). The COM20051I is based around the popular Intel 8051 architecture. The device is implemented using a microcontroller core compatible with the Intel 80C32 ROMless version of the 8051 architecture. The COM20051I is ideal for distributed control networking applications such as those found in industrial/machine controls, building/factory automation, consumer products, instrumentation and automobiles.

FEATURES

? High Performance/Low Cost

? Microcontroller Based on Popular 8051 Architecture

? Intel 8051 Instruction Set Compatible

? Drop-In Replacement for 80C32 PLCC

? Network Supports up to 255 Nodes

? Powerful Network Diagnostics

? Maximum 507 Byte Packets

? Duplicate Node ID Detection

? Self-Configuring Network Protocol

? Retains all 8051 Peripherals Including Serial I/O and Two Timers

? Utilizes ARCNET Token Bus Network Engine

? Requires No Special Emulators

? 5 Mbps to 156 Kbps Network Data Rate

? Network Interface Supports RS-485, Twisted Pair, Coaxial, and Fiber Optic Interfaces

? Receive All Mode Allows Any Packet to Be Received