COM20020-5
COM20020-5 ULANC
Universal Local Area Network Controller
with 2K x 8 On-Board RAM
FEATURES
•
•
•
•
•
•
24-Pin Embedded Network Controller/
Transceiver/RAM
Ideal for Industrial/Factory Automation
and Automotive Applications
Deterministic, 5 Mbps, Token Passing
ARCNET Protocol
Minimal Microcontroller and Media
Interfaces
Flexible Microcontroller Interface for Use
with 80XX, 68XX, etc.
Automatically Detects Type of
Microcontroller Interface:
-Non-Multiplexed or Multiplexed Bus
-Separate nRD & nWR Lines or DIR &
nDS Lines
Full 2Kx8 On-Chip RAM
Command Chaining for Top Performance
Reduced Reconfiguration Times
Sequential Access to Internal RAM
Software Programmable Node ID
Duplicate Node ID Detection
Powerful Diagnostics
•
•
•
•
Receive All Mode
Data Rates from 5 Mbps to 312.5 Kbps
24-Pin DIP or 28-Pin PLCC Package
Flexible Media Interface:
- RS485 Differential Driver Interface for
Low Cost, Low Power, High Reliability
- Backplane Mode for Direct Connection to
Media in Short Distance Applications
Eight, 256-Byte Pages Allow 4 Pages TX
and RX Plus Scratch-Pad Memory
No Wait-State Arbitration
Programmable TXEN Polarity
Next ID Readable
Internal Clock Prescaler for Slower Network
Speed without Slowing Arbitration
o
Operating Temperature Range of -40 C to
o
+85 C
Self-Reconfiguring Protocol
Supports up to 255 Nodes
Supports Various Network Topologies (Star,
Tree, Bus...)
CMOS, Single +5V Supply
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
GENERAL DESCRIPTION
SMSC's COM20020-5 is a member of the family
of Industrial Network Controllers from Standard
Microsystems Corporation. The device is a
special purpose communications 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 COM20020-5
make it the only true network controller
optimized for use in industrial and automotive
applications.
Using an ARCNET protocol
engine is the ideal solution for factory
automation applications because it provides a
token-passing
SMSC [ SMSC CORPORATION ]
