How to write PFKey?

Remony

Expert 1560 points

Other Parts Discussed in Thread: BQ3060

I am testing charging & discharging the 2 cell battery using BQ3060.

but It don't operate normally.

SOCC bit on PF status flag is set.

And I can't write data flash.

I guess data flash is locked.

So I write PFKey, but PFflag is not cleared.

First I read block 0x62. result is 73 26 12 17

And then I write result to 0x62.

But PFstatus is not cleared.

Is my test right?

I would like to know how to initialize device and set default value.

over 13 years ago

0 Poul Sharikov over 13 years ago

Prodigy 20 points

Explain, please, step by step, how to write PFKEY for clear PFStatus.

I'm use BQ20Z95.

0 Chase7071949597 over 13 years ago in reply to Poul Sharikov

TI__Genius 10235 points

The PF Keys actually need to be entered low byte first. They need to be sent in succession to the Manufacturer's Access (address 0x00). So, simply send 0x2673 followed by 0x1712 to address 0x00. The commands must be sent within 4 seconds of each other. An easier way to do it is to use the 'Write 2 Word Command' button in the SBS screen of EVSW.

0 Poul Sharikov over 13 years ago in reply to Chase7071949597

Prodigy 20 points

Thank you !

All worked.

http://www.ti.com/litv/pdf/slua421a.pdf should be studied by all who use the Family Gas Gauges products.

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How to write PFKey?