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DRV3245Q-Q1: [DRV3245Q-Q1] What is a Phase Comparator? and what they do?

Part Number: DRV3245Q-Q1

Hello. i have a question regarding DRV3245Q-Q1 Phase Comparator Function.

1. What is the meaning of PHCxCOMP(x=A,B,C) bit 1, 0 each when i read register 0xA, 100 with SPI command?

2. When i drive inverter FETs(A,B,C,D,E,F) with PWM signal like below structure, If i input PWM signal to A, F FET, then what is the reponse of 0xA Command?

A B C

D E F

3. Can i get CRC documentation? i can't understand CRC mechanism of DRV3245. manual says CRC is cummlated, but i can't  understand CRC generation process.

thank you.