DRV8424E: DC motor by DRV8425PPWPR IN PWM MODE can only be turned forward, not reversed

hello

I  USE DRV8424PPWPR TO drive DC Brushed  motor  in pwm mode.

The moto can only be turned forward, not reversed. 

IN1=1 IN2=0 IS WORK OK 

IN1=0 IN2=1  IS BAD , 

The cpu program uses the simplest level control  in1=1,in2=0 forward rotation. and for out1,2 oscilloscopes observe square waves.

when in1=0,in2=1. Don't move. out1,2 oscilloscope observation no square wave, is clutter, indicating that there is no output signal at this time.

Both A and B drivers do this.

I don't know why.

My circuit PCB completely refers to the manual

 Someone have any good suggestion?

Thanks!

Tom

Cherry Zhou：

Hi,

We've got the issue and are trying to look help from our expert, please expect the response.

Thanks.

,

Cherry Zhou：

Hi,

In order to gain a better understanding of the problem, could you please send the following information.

1. Could you please verify the part number (DRV8424E, DRV8425PPWPR, or DRV8424PPWPR)

2. Motor and Vref voltage.

3. Oscilloscope images of input and output signals in both the forward and reverse direction.

Thanks.