• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 309 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV8308 command sequence

Patrick Chen
Mastermind 8875 points
Other Parts Discussed in Thread: DRV8308

Hello,

            Customer use DRV8308 and issue command sequence :

Power up--> issue command to register--> EN pin low-high-low-High--> motor spin. But if Power up--> issue command to register--> EN pin low-high-> motor not spin. 

Another sequence--> Power up--> EN plin low-high-low--> issue command to register-->EN pin low-high-->motor spin.

           Why is phenomenon of above sequence? Do we have correct command sequence or flow chart to provide for customer? Thank you.

BR

Patrick

  • 0
    TI__Mastermind 20985 points

    Are you saying that ENABLE must be taken from Low to High twice for the motor to spin?  Is this the sequence:

    1. Power up VM
    2. Write SPI  (with ENPOL = 0)
    3. Change ENABLE from Low to High  (nothing happens)
    4. Change ENABLE from High to Low  (nothing happens)
    5. Change ENABLE from Low to High   (motor spins up)

    Please measure the voltage on pin ENABLE to verify it went high during Step 3.  Also, measure VM to verify it is stable when you do Step 3.

    Best regards,
    RE