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DRV8244S-Q1LEVM: SPI Motor Control

TI-CSC
Genius 13005 points
Part Number: DRV8244S-Q1LEVM

Hello E2E Experts,

Good day.

I have the SPI variant DRV8244SQRYJRQ1 motor driver chip and was wondering if I can control the speed of the motor using SPI.  I can turn the motor on 100% duty cycle using the S_EN_IN1 variable, but I cannot figure out how to make the motor spin slower.  Is the only way to control how fast my brushless dc motor spins to write a PWM signal to the EN/IN1 pin, or can I do it digitally through SPI?

If it is possible, I need to know which register(s) are used to control the speed of the motor.

Regards,

CSC

  • 0
    TI__Guru 55615 points

    Hello,

    Did you mean "brushed" motor instead of "brushless"?  For speed control, we recommend an external PWM input.  Technically, you can control speed by setting and resetting the S_EN_IN1 bit, but you would be limited by the frequency of your SPI bus for PWM.

    Regards,

    Ryan