Bit timing parameters for SJA1000 CAN Controller

[Wilfried]

Controller Area Network (CAN) is a serial, asynchronous, multi-master communication protocol for connecting electronic control modules, sensors and actuators in automotive and industrial applications. A feature of the CAN protocol is that the bit rate, bit sample point and number of samples in a bit period are user programmable. This gives the user the freedom to optimize the performance of the network for his given application. During this optimization process the user has to be aware of the relationship between the bit timing parameters, the reference oscillator tolerance and the various signal propagation delays in the system.

This report focuses on the determination of bit timing parameters for the Philips CAN controllers SJA 1000 and PCx82C200. The basic CAN bit timing relationships are explained, calculation rules are discussed and examples are given with respect to different system requirements. In addition to the sets of equations, graphs and tables are provided allowing an easy graphical determination of bit timing parameters.

Use the following link to download the document:
http://www.copperhillmedia.com/PDF/SJA1000%20Bit%20Timing%20Parameters.pdf

- Wilfried