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BQ27220EVM-744: How to check if it is in state of Power On Reset or after SW Reset?

Mannsik Chung
Prodigy 90 points
Part Number: BQ27220EVM-744
Other Parts Discussed in Thread: BQ27220

I want chage configuration on RAM. So, I need to check if BQ27220 is in state of POR(Power On Reset) or at after SW Reset.

In TRM, Flags()[ITPOR] can be used. But, I can not find address of Flags() which can access BIT, [ITPOR].

What is the adddress of Flags() and bit number of [ITPOR]?

  • +1
    TI__Guru 61536 points

    The bq27220 doesn't have the ITPOR flat (this stands for Impedance Tracking Power On Reset). It's a mistake in the TRM.

    The bq27220 will automatically start gauging after a reset. It won't stay in a state of POR. You can always check one of the CEDV Profile registers, if the gauge defaulted to initial values after a reset in lieu of a flag like ITPOR.