BQ34Z100-G1: CC offset Cal redux

Jeffrey Wright

Part Number: BQ34Z100-G1

Hello again;

For some reason the "Ask a related questions" button isn't working for me, so I'm submitting a new issue, but involving the same calibration question.

It appears that I cannot write to the CC Offset RAM manually? It seems that the gauge won't allow me to do so. I enter calibration mode as per the TRM, collect 8 samples using the Analog Conversion Counter, average the samples, and then attempt to write the Gauge with the new CC Offset value...But it won't take.

Will you please confirm that this gauge will only update the offsets by issuing the BOARD_OFFSET: 0x0009 and/or CC_OFFSET: 0x000A command(s), followed by the CC_OFFSET_SAVE: 0x000B command?

If so, it's very disappointing, since it takes forever.

Thanks

over 4 years ago

0 Wyatt Keller over 4 years ago

TI__Guru** 105740 points

Hello Jeffrey,

Can you describe the sequence you are using to program the value?

As mentioned before, usually the calibration data is loaded in with the golden image so calibration time is not needed.

Sincerely,

Wyatt Keller

0 Jeffrey Wright over 4 years ago in reply to Wyatt Keller

Expert 2875 points

I've implemented the CC gain calibration routine as per the 34z110's TRM SLUUBF7A 5.10 Current Calibration. I was hoping that I could follow the same procedure for CC offset calibration, and simply overwrite the value in the gauge's RAM. THis, unfortunately, doesn't work, as the gauge ignores the value I write. Perhaps if I send the CC offset command first? I'll see

0 Wyatt Keller over 4 years ago in reply to Jeffrey Wright

TI__Guru** 105740 points

Hello Jeffrey,

I will need to check if the 2 have different methods for calibrating the offset.

Sincerely,

Wyatt Keller

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BQ34Z100-G1: CC offset Cal redux