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COM20051+ 반도체 회로 부품 판매점

Integrated Microcontroller and Network Interface



SMSC Corporation 로고
SMSC Corporation
COM20051+ 데이터시트, 핀배열, 회로
COM20051+
www.DataSheet4U.com
Integrated Microcontroller and Network
Interface with Watchdog Timer and A/D
Converter Interface
FEATURES
Low Cost
Microcontroller Based on Popular 8051
5 Mbps to 156 Kbps Network Data Rate
Architecture
Network Interface Supports RS-485,
Intel 8051 Code Compatible
Twisted Pair, Coaxial, and Fiber Optic
68 Pin PLCC
Interfaces
Network Supports up to 255 Nodes
Receive All Mode Allows Any Packet to Be
Powerful Network Diagnostics
Received
Maximum 512 Byte Packets
On-Board Programmable Watchdog Timer
Duplicate Node ID Detection
Analog Data Acquisition Port
Self-Configuring Network Protocol
Retains all 8051 Peripherals Including
- Interfaces to Any A/D Converter up to
16 Bits Wide
Serial I/O and Two Timers
- Sampling Rates from 1 s to 100ms
Utilizes ARCNET® Token Bus Network
Engine
Possible
- Decouples 80C32 from Repetitive
Requires No Special Emulators
Sampling Tasks
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
similar to 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. In contrast to other embedded
controller/networking solutions, the COM20051+
adds a fully-featured, robust, powerful, and
simple network interface, watchdog timer, and
data acquisition port, while retaining all of the
basic 8051 peripherals, such as the serial port
and counter/timers.


COM20051+ 데이터시트, 핀배열, 회로
TABLE OF CONTENTS
FEATURES .......................................................................................................................................1
GENERAL DESCRIPTION.................................................................................................................1
PIN CONFIGURATION......................................................................................................................3
OVERVIEW.......................................................................................................................................4
DESCRIPTION OF PIN FUNCTIONS ................................................................................................5
BASIC ARCHITECTURE ...................................................................................................................8
PROTOCOL DESCRIPTION............................................................................................................14
NETWORK PROTOCOL............................................................................................................14
DATA RATES ............................................................................................................................14
NETWORK RECONFIGURATION .............................................................................................14
BROADCAST MESSAGES ........................................................................................................16
EXTENDED TIMEOUT FUNCTION............................................................................................16
LINE PROTOCOL......................................................................................................................17
SYSTEM DESCRIPTION ..................................................................................................................20
MICROCONTROLLER INTERFACE ..........................................................................................20
TRANSMISSION MEDIA INTERFACE .......................................................................................20
ARCNET CORE FUNCTIONAL DESCRIPTION ................................................................................28
MICROSEQUENCER.................................................................................................................28
INTERNAL REGISTERS............................................................................................................28
INTERNAL RAM ........................................................................................................................40
COMMAND CHAINING..............................................................................................................44
RESET DETAILS .......................................................................................................................47
INITIALIZATION SEQUENCE ....................................................................................................47
IMPROVED DIAGNOSTICS.......................................................................................................48
COM20051+ APPLICATIONS INFORMATION..................................................................................60
USING ARCNET DIAGNOSTICS TO OPTIMIZE YOUR SYSTEM.....................................................78
CABLING THE COM20051+ .............................................................................................................82
USING THE COM20051+'S EMULATION MODE ..............................................................................83
OPERATIONAL DESCRIPTION........................................................................................................84
MAXIMUM GUARANTEED RATINGS ........................................................................................84
DC ELECTRICAL CHARACTERISTICS .....................................................................................84
TIMING DIAGRAMS ..................................................................................................................86
80 Arkay Drive
Hauppauge, NY 11788
(516) 435-6000
FAX (516) 273-3123
2




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COM20051+ controller

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