MSI with LSE auto calibration accuracy

[Steffen Rose]

Has the MSI with LSE auto calibration a sufficient precision for the 1Mbit CAN bitrate?

What is the accuracy compared with a crystal PLL clock?

[waclawek.jan]

ST states that MSI with LSE autocalibration is good as a FS USB clock. USB standard requires FS signaling to have timing error less than 0.25%. Is this sufficient for 1Mbit CAN bitrate?

JW

[Steffen Rose]

Example calculations say 0.5% for 1Mbit/s, but it's depend of the specific environment.

Thank you.