COM20051 Datasheet, PDF (1/82 Pages) List of Unclassifed Manufacturers – Integrated Microcontroller and ARCNET (ANSI 878.1) Interface

COM20051
Integrated Microcontroller and
ARCNET (ANSI 878.1) Interface
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
GENERAL DESCRIPTION
The COM20051 is a low-cost, highly-integrated
microcontroller incorporating a high-performance
network controller based on the ARCNET Token
Bus Standard (ANSI 878.1). The COM20051 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 COM20051 is ideal for
distributed control networking applications such
as those found in industrial/machine controls,
building/factory automation, consumer products,
instrumentation and automobiles.
The COM20051 contains many features that are
beneficial for embedded control applications.
The microcontroller is a fully-functional 16MHz
80C32 that is comparable to the Intel 80C32 with
2 timers. In contrast to other embedded
controller/networking solutions, the COM20051
adds a fully-featured, robust, powerful, and
simple network interface while retaining all of the
basic 8051 peripherals, such as the serial port
and counter/timers.
In addition, the COM20051 supports an
Emulation Mode that permits the use of a
standard 80C32 emulator in conjunction with the
COM20051 to develop software drivers for the
network core. ARCNET core is mapped to a
256-byte page of the External Data Memory
Space of the 80C32.
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