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I read somewhere the below two line and got confused what is the actual difference between the two line. These two lines are related to CAN

1.Maximum Signal frequency used is 1 Mbit/sec

2.Typical maximum data rate achievable is 40KBytes/sec.

If anyone knows about it please share the answer.

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There is a mistake. The units of frequency is cycles/second and not Mbit/second. I noticed this mistake in one of the online links on CAN.

I think what it means is that the maximum theoretically possible data rate is 1Mbps and the typical real life maximum data rate is 320Kbps(40KBytes/sec). The standard says that for network lengths below 40m, 1Mbps can be achieved but for network lengths of 500m the data rate achieved is around 125kbps. So I think that's reason typical data rate is given as 40KBytes/sec.

References:

  1. http://en.wikipedia.org/wiki/CAN_bus
  2. http://www.computer-solutions.co.uk/info/Embedded_tutorials/can_tutorial.htm
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