COM20019 Datasheet, PDF (1/81 Pages) SMSC Corporation – Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8 On-Board RAM

COM20019
Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8
On-Board RAM
FEATURES
• New Features
- Data Rates up to 312.5 Kbps
- Programmable Reconfiguration Times
• 24 Pin DIP, 28 Pin PLCC, 48 Pin TQFP
Packages
• 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
• Command Chaining for Packet Queuing
• Sequential Access to Internal RAM
• Software Programmable Node ID
• Eight, 256 Byte Pages Allow Four Pages TX
and RX Plus Scratch-Pad Memory
• Next ID Readable
• Internal Clock Scaler for Adjusting Network
Speed
• Operating Temperature Range of -40^oC to
+85^oC
• Self-Reconfiguration Protocol
• Supports up to 255 Nodes
• Supports Various Network Topologies (Star,
Tree, Bus...)
• CMOS, Single +5V Supply
• Duplicate Node ID Detection
• Powerful Diagnostics
• Receive All Packets Mode
• Flexible Media Interface:
- RS485 Differential Driver Interface For
Low Cost, Low Power, High Reliability
GENERAL DESCRIPTION
SMSC's COM20019 is a member of the family of
Embedded ARCNET Controllers from Standard
Microsystems Corporation. The device is a
general 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 COM20019
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 control
applications because it provides a deterministic
token-passing protocol, a highly reliable and
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