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TCAN1146-Q1: About Sleep Mode and Selective Wake

Part Number: TCAN1146-Q1

Tool/software:

Hi team:

   The following image is from the data manual of tcan1146 , it's about the Selective Wake Enabled Sleep Mode.

I have a few questions, please help me answer them.

(1)How to confirm whether it has entered state A or B? 

(2)What is the Bus Bias? Is it the voltage value of CANH/CANL relative to GND?

Thanks!

Regards,

Fed