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BQ25601D: Asking for the BQ25610 design on the USB bus status

SHH
Mastermind 32196 points
Part Number: BQ25601D

Hi Team,

Customer is designing BQ25610 on the keyboard application.

Would you please provide comment for the following questions?

 

There is MUC and the BQ25601D on the board. Both MCU and BQ25601D D+/D- are connected. There are two mode in the KB.

  1. In wireless mode, MCU USB engine is off, D+/D- are floating. If plugging the cable to charge, BQ25601D register REG08 USB bus status is incorrect. D+/D- waveform are captured as below.

          

         2. In KB off status, BQ25601D register REG08 USB bus status is correct if plugging cable to charge.

              D+/D- waveform are captured as below.

  

BR,

SHH