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DRV8711EVM: All the registers set to 1.

Hariharan M1
Prodigy 130 points
Part Number: DRV8711EVM

Hi,

After doing the reset in GUI, all registers getting its default state. But after the reset cleared in GUI, all the bits of registers hold 1 , including status register but fault LED is not blinking.

Followed steps:

Step 1

 Step 2

Step 3

Step 4 

Kindly let me know, how to resolve this register issue.

  • 0
    TI__Guru 56650 points

    Hariharan,

    I just duplicated what you saw. The behave is normal.

    After you click "Reset", the RESET pin is set to high. On datasheet page 25: "If the RESET pin is asserted, all internal logic including the indexer is reset. All registers are returned to their initial default conditions. The power stage will be disabled, and all inputs, including STEP and the serial interface, are ignored when RESET is active."

    So, all register bits are "1" because the serial interface is ignored.

    After click the "Reset" button again and turn "Reset" button back to green (RESET pin is also turned to low), we can read all registers to verify: All registers are returned to their initial default conditions.

  • 0 in reply to Wang5577
    Prodigy 130 points

    Now it's working, Thank you Wang Li.