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.

BQ40Z50: permanent fail register

Part Number: BQ40Z50
Other Parts Discussed in Thread: BQSTUDIO

hello, after uploading the Memory file (edited using notepad as you told, and everything worked great), the input voltage increased (manually) and the PF STATUS SOC is on.  The Fet's are off, i have tried to reset the device, to change the value of "SOV", to restart the progrem and the computer, set a lower voltage (between the normal limits), turning the voltage off ,but the "SOV" is still on and i cannot work with the EVM.
when i tried to upload new memoy file the Error i recieved was :" Parameter not written, classname PF status subclass AFE reg Parameter AFE SCD2 written to data memory failed read back verification"

it's important to say the i never changed the value of AFER SCD2 , and on the previous uploading there was no error at all .

what should i do in order to work properly with the device?

thank you very much for your help

  • Hi Victor,

    Once you have a PF, the df writes are disabled. SO you will be unable to write to df unless you clear the PF. Please first reduce teh voltage of the cell to clear your SOV, then send the PF clear command from the bqstudio commands panel and then you can change the df after that.