This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ25611D: BQ25611D: How to reset the PMU with i2c commands

Part Number: BQ25611D

Is that any i2c command that can cause device reset.  (Q4 Off and On)?

  • Hi,

    BATFET_DIS (REG07[5]).

    Thanks,

    Ning.

  • Hi Ning

         We already use this bit to let device enter shipping mode.

         In our design the PMU will supply power to a MCU via Vsys and  at the same the MCU control BQ25611D via I2C. 

         If we set BATFET_DIS to 1  the device will power off to shipping mode. To exist this mode need plug USB or assert QON.

         

        We some I2C commands to reset PMU.("Power on" right after "power off "on Vsys  Pin).. 

        

    BRs,

    -Jim

  • Hi Jim:

    Your question is how to do SYS reset? If yes, you can use /QON pin to reset SYS. BATFET will turn off and then turn back on. /QON pin can be connected to a push button or MCU IO.

  • Hi HongMao,

        Great thanks for  your reply.

         Yes, we want to do SYS reset. But what we want is a SYS reset w/o QON pin, because our MCU's power is supplied by Vsys, MCU will lose power ,we can not use it to control QON at that time.

         That is why we ask whether there is I2C command which can trigger SYS reset.

    BRs,

    -Jim

  • Hi Jim:

    There is no dedicated SYS reset by host. MCU can turn BATFET off, but once SYS loses power, MCU cannot turn BATFET back on. So I would suggest using MCU to pull /QON pin low to reset system. It works even MCU is connected to SYS.