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Original question:

BQ25611D: If the I2C of BQ25611D receives the BT master control of 1.95v, can it communicate normally and is there any risk...

BQ25611D: When there may be unstable contact during unplugging from usb, will BQ25611D think that the product has been inserted into usb again, thus exiting the shipping mode?

2018
Expert 2630 points
Part Number: BQ25611D

After setting the following register, we unplugged the USB cable and entered the shipping Mode.



In mass production, we sent the command via USB. Is the product not in shipping mode when we set up the register?

When we unplug the usb cable is BQ25611D close BATFET into shipping mode.

Our question is:
When there may be unstable contact during unplugging from usb, will BQ25611D think that the product has been inserted into usb again, thus exiting the shipping mode?

  • 0
    TI__Expert 5590 points

    It is a good question. There are 2 ways to put the device into ship mode.

    #1: when adaptor is not present, disabling BATFET by I2C (BATFET_DIS =1)

    #2: when adaptor is present, need to put the device in the HiZ mode by writing BATFET_RST_VBUS =1 and then BATFET_DIS =1

    Regarding your question, that's depending on how much time the intermittent contact takes. I would recommend #1 method to put the device in ship mode. Unplug adaptor and then put the device into ship mode.

    Regards,

    Hong