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DRV8718-Q1: anti reverse test

Part Number: DRV8718-Q1

Dear expert,

Customer is testing DRV8718 for battery reverse scenario as below:

DRV8718 below pins are floating:  GND, DVDD, PVDD.

Pin DRAIN connect to GND.

There is 12V at SPI, PWM pin. 

They measured 300mA flow from 12V to GND through DRV8718. 

They want to know whether current can flow through SPI/PWM to DRAIN?