1989-02-01

General Instrument AUTOLAN™- A High Speed Multiplexing System for Automotive Body Wiring Systems 890541

AUTOLAN is a Class C multiplexing system suitable for use with realtime control systems.
It fully conforms to the SAE Multiplex Subcommittee's proposed definition of a Class C system in that:
  • Repetitive and Bursty data transfers are possible
  • Handshaking can be implemented
  • More than 10 Nodes can be handled
  • Latency less than 5 millisecond
  • Bus rate 4 Mbits/sec
  • It can be used as a Class B system to provide data communication between microprocessor controlled assemblies.
  • It can be used as a Class A system to replace the conventional body wiring harness.
The transmission media is a dual twisted pair cable. Shielding may be required in extreme radiant field conditions, such as may be found in electric traction systems with a power rating greater than 500 HP.
AUTOLAN does not require a microprocessor at each Node. Rather, for Class C, the system microprocessor drives the AUTOLAN network, whose nodes act as its remote I/O ports. And for Class A and B, a single microprocessor at a Master node is dedicated to running the network.

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