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Original question:

BQ27220: Where is the BAT_GD pin? GPOUT?

BQ27520-G4: BAT_GD not pulled up using BATGSPUEN

Mark Morrison
Prodigy 10 points
Part Number: BQ27520-G4
Other Parts Discussed in Thread: EV2400

I would like to use the internal pull-up on BAT_GD that is enabled through the BATGSPUEN bit.  When setting this bit it is my understanding that the BAT_GD pin will be pulled up to 2.5V.  However, the pin appears to be open drain after setting this bit, followed by a RESET command.  Is it necessary to also seal the device after performing a RESET?

  • 0
    TI__Guru** 102355 points

    Hello Mark,

    The RESET command will cause the gauge to become sealed if it was ever sealed previously. Are you using an EV2400 to setup the registers? The pull-up is working before you send the reset command, then after the reset the pin is no longer pulled high? What is the state of the Op Config register before and after the reset?

    Sincerely,

    Wyatt Keller