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LM96163 read value issue

Hi Sir:

Customer read register value are FF on 0x46 and 0x47. They can’t read sure value when they change PWM.

I have confirmed the register 0x03 and 0x09 value with them. The value are 04 and the bit 2 is 1. The TACH input is enabled.

 

 

I confuse 0x46 [bit1:bit0] value are 1. I think the sure value probably are 0.


 

 

Do you have any suggestions for this case?Thanks you.


  
  
  
  
  
  
  
  
  
  
  
 
 
 

 
                  

 

I confuse 0x46 [bit1:bit0] value are 1. I think the sure value probably are 0.

 

Do you have any suggestions for this case?Thanks a lot.