BQ20z45 operation configuration C

Other Parts Discussed in Thread: BQ20Z40, BQ20Z45

Dear All:

bq20z40/bq20z45 Technical Reference description the PRE_ZT_PF_En of the Operation Cfg C as below.

This bit enables or disables permanent failures from occurring before the Impedance Track algorithm is enabled.

0= All PFs (exceptDFF)are prevented from occurring until the Impedance Track algorithm is enabled. Shutdown is also disabled. See the following note.

1=All PFs are allowed regardless of whether the Impedance Track algorithm has been enabled or not.

We observed TR file incorrectly define this flag.

Regardless of this flag whether be set high, PF always be actived status.

Do you need to modify this TR file? or clairfy it?

Thanks a lot!

over 14 years ago

0 Chase7071949597 over 14 years ago

TI__Genius 10235 points

This is normal operation for the bit. If this bit is set to 0 and IT is disabled, the PF flag will still raise if there is a PF violation. This is just to inform you that there is an issue. However, there is nothing recorded to data flash, the FET status doesn't change, and the fuse is not blown. You can easily clear the flag by resetting the gauge.