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BQ40Z80: 0x0029 Permanent Fail Data Reset command doesn't clear flash data

Maxim Fiodorov
Prodigy 180 points
Part Number: BQ40Z80

Hi everyone.

I send 0x001D Fuse Toggle command to switch ON fuse pin for testing.

It sets permanent failure.

I resend x001D Fuse Toggle command to switch OFF fuse.

I manage to turn the permanent failure status off by sending 0x0029 Permanent Fail Data Reset command but it doesn't reset data flash as it suppose to according to technical reference para 18.1.26

The data flash PF Status holds the battery values at the time of sending 0x001D Fuse Toggle command to switch ON . There is no reset of PF Status values.

What am I doing wrong???