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DRV8461EVM: Control DRV8461EVM over SPI using external MCU

Ethan Loeffelholz
Prodigy 10 points
Part Number: DRV8461EVM
Other Parts Discussed in Thread: DRV8461

Tool/software:

Hello-

Our company bought a DRV8461EVM to test its suitability using the evaluation software. We would like to move forward with this chip and are now looking at writing code to control it using our test MCUs (A stm32 nucleo f446re). What would be the best way to attempt to control the driver over spi using our mcu. Is it okay to simply unplug the SPI, SDO, and SCK jumpers and plug our mcu into those slots and then upload code that way?
I appreciate your support

Thank you
Ethan

  • 0
    TI__Mastermind 44595 points

    Hello Ethan,

    Please refer to the EVM User's Guide https://www.ti.com/lit/ug/slou558b/slou558b.pdf pages-40 to 42. You can remove the jumper shorts for J4 and J8 and for the VREF. Then you can access the DRV8461 pins via the header and connect it to your MCU. See below snippet. For SPI you'll need SDO, SDI, SCLK, nSCS and GND connections. You should also control nSLEEP, STEP, DIR, ENABLE, M0, M1, MODE etc and the VREF analog ref. voltage externally.

    Because you won't be connecting the USB you should supply 3.3V via TP37 for the VCC power of the DRV8461/2. Hope this helps. 

    Regards, Murugavel