SJA1000 baud rate settings 1Mbps

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SJA1000 baud rate settings 1Mbps

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Contributor I

Hi,

I am using SJA1000 in a circuit with baudrate 1Mbps with 24Mhz crystal. I tried many setting but none of them worked. The emulator gives errors. 

The CAN emulator (http://www.cananalyser.co.uk/candoiso.html) expecting sampling point (for 1mbps) to be at 80% but none of the settings gives sampling point at 80%. I don't know its sampling point issue or settings issue!!!

I used the following tools for settings:

https://www.kvaser.com/support/calculators/bit-timing-calculator/

https://www.esacademy.com/en/library/calculators/sja1000-timing-calculator.html

 

Any clue will be highly appreciable...

Kind Regards,

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1 Solution
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Contributor I

Finally it worked... The problem was bus impedance. I forgot to add 120ohms capacitor between CAN-H and CAN-L line.

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Contributor I

Finally it worked... The problem was bus impedance. I forgot to add 120ohms capacitor between CAN-H and CAN-L line.

View solution in original post

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NXP TechSupport
NXP TechSupport

Hi Ijaz,

please provide your schematic with voltage levels and part values.

 

With Best Regards,

Jozef

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