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BQ24260 D+/D-_EN bit and voltage reading

Fred Roberts83
Prodigy 20 points
Other Parts Discussed in Thread: BQ24260

I have a few questions about BQ24260.

1) There is a D+/D-_EN bit mentioned in the BQ24260 datasheet on page 20. But it does not appear in the register map. Is this register implemented, and if so, where is it in the register map?

2) Is there any problem with connecting the D+/D- lines directly in parallel to the BQ24260 as well as a microcontroller which communicates using the lines? 

3) Is there a register I can read that will indicate whether the battery voltage is low, or give any indication of the battery voltage?

Thanks.

  • 0
    TI__Guru**** 158311 points
    Regarding 1, it is register 5H, bit 4.
    Regarding 2, no as long as those lines do not attempt to communicate through first 1s following IC power up or during a forced detection using the bit4 above.
    Regarding 3, reg 5H bit 7 reports minimum system voltage active which means the battery is below the VMINSYS voltage. I recommend adding a gauge if you need more precision than that.