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DRV8843EVM: Motor Not stepping

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Part Number:DRV8843EVM

Hi  I don't see motor movement when pressing the step button. 

the set up is as follows:

scope connected to motor A+ and B+ (only  one of the motor phases is being modulated).

Reset/sleep check box's are checked

Motor is connected to J3

motor voltage = 20v. 

The current is set to 1 A. the board jumper  set to the default.

Did I miss something?

The application provided does not support the DRV8843, is  an update available.

thanks


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