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Original question:

DRV8711 SPI write and read issue

DRV8711: logic levels and settings

Andrew Eisenhawer
Prodigy 20 points
Part Number: DRV8711

Is the DRV8711 compatible with 3.3V logic (SPI, SLEEP, RESET, etc?  My controller has very few 5V tolerant pins, and my SPI and ADC pins are 3V3 only.  I can keep BEMF low enough to avoid overvolting the ADC, but am worried about the SPI, SLEEP and RESET.   Will the DRV8711's internal 5V regulator pull up pins to >3V3?

  • 0
    TI__Guru** 114905 points
    Hi Andrew,

    Yes, the DRV8711 is compatible with 3.3V logic. With the exception of the BEMF pin, the internal 5V regulator does not pull up pins >3.3V. The VDIV bits can be used to divide the BEMF by 4, 8, 16, or 32

    The DRV8711EVM and BOOST-DRV8711 both use a 3.3V mcu to control the device.