DRV8305-Q1: DRV8305 Wake Pin Questions

Greg Amidon

Part Number: DRV8305-Q1
Other Parts Discussed in Thread: DRV8305

Couple questions on the Wake pin of the DRV8305 that are not addressed in the datasheet (that I can find):

Is there a pull-up or pull-down on the WAKE pin?
What is the timing required after pulling WAKE high? Is it 10ms like PVDD rising above UVLO?
The customer wants to use the WAKE pin to put the part to sleep. Can this be done by writing sleep to register 9 and then pulling WAKE low later when sleep is desired or do they need to pull WAKE low then write SLEEP to register 9?

Thanks,

Greg

0 Aaron Barrera over 2 years ago

Hi Greg,

I will get you a formalized response tomorrow.

Thanks for your patience.

Regards,
Aaron

+1 Adam Sidelsky over 2 years ago in reply to Aaron Barrera

Greg,

The wake pin is active high, customers usually use a pull-down resistor to keep the device in sleep unless the MCU intentionally wants to drive this pin HIGH to wake the part.
Yes this is correct.
The SPI register puts the device to sleep, WAKE must be low for the part to go to sleep. Then when WAKE is needed, take WAKE high.

Regards,

-Adam

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