• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 189 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

BQ78PL116: Access to extended registers

Xavier XI
Prodigy 10 points
Part Number: BQ78PL116
Other Parts Discussed in Thread: BQWIZARD, , BQ40Z80, BQ34Z100, BQ40Z50
Hi,
We are working with a BQ78PL116 and an STM32 MCU and would like to read/write SBData commands without resorting to bqWizard. The standard SBData commands work fine, but the technical reference doesn’t cover all parameters available in bqWizard.
For example we would like to access registers like "Hardware Configuration" or "Algorithm Enable" (technical reference manual SLUU481 page 60), but there is no information as to how we should proceed.
We monitored SMBus communications between bqWizard and the BQ78PL116 and saw that commands used to access configuration registers are in range 0x3C to 0x3F (or maybe 0x48 or 0x49). We found partial info on the forum about these registers, but we are missing a detailed documentation showing the procedure to access them.
Do you know where to find additional documentation about theses registers? For example we need to toggle the "Force CFET" bit of "Algorithm Enable Register" with our STM32 MCU.
Thanks.
  • 0
    TI__Guru** 102415 points

    Hello Xavier,

    Unfortunately this is an old part and we no longer can support it since it is not recommended for new designs, we recommend the BQ34Z100 or BQ40Z50/BQ40Z80 for new designs with high cell counts.

    My best advice is to replicate the commands implemented by bqWizard.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    Prodigy 10 points

    Hello Wyatt,

    We understand that this is an old part. However, we don't have a choice but to keep working with it as long as we have it in stock.

    It might not be recommended for new designs but it still is in "Active" state on TI's website, so we would be glad if you could give us the missing documentation even though you can't provide support for the part.

    Many thanks,
    Xavier

  • 0 in reply to Xavier XI
    TI__Guru** 102415 points

    Hello Xavier,

    Since the part is older, a lot of the information has been archived and is not easily available, if available at all. This is one of the reasons we can no longer support the gauge but still sell it to supply customers which have been using it for many years.

    I believe the best way is to replicate the bqWizard commands.

    Sincerely,

    Wyatt Keller