Intel(R) Implementing the J1850 Protocol
This paper introduces the SAE J1850 Communications Standard
utilized in On-and Off-Road Land-Based Vehicles. Attributes of the
J1850 protocol include an open architecture, low cost, master-less,
single-level bus topology. The SAE J1850 Standard supports two main
alternatives, a 41.6 Kb/s PWM approach, and a 10.4Kb/s VPW approach.
To keep a reasonable depth of subject matter within the confines of this
paper, the focus will be on the 10.4Kb/s VPW approach. This paper will
explore the positioning of the J1850 Standard, VPW modulation, J1850
arbitration, J1850 message frames, J1850 symbol definitions, In-Frame
Responses, the J1850 physical layer, and supporting J1850
documentation.
- File Name/Size:
- j1850_wp.pdf
- 89598 bytes
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