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Original question:

BQ20Z655-R1: Learning Cycle Problem

BQ20Z655-R1: Golden image FETs are disabled

Ali Tekin
Prodigy 50 points

Hi, I have followed the steps for "Achieving the Successful Learning Cycle," and as a result, the "Update Status" changed to 0x0E. Then, I exported optimized *.GG file, changed "Update Status" to 0x02 and "Cycle Count" to 0 in the file. After that, I programmed the original SENC file and imported the *.GG file back. However, at the final step, the charge and discharge FETs are disabled. I do not understand how to activate them in the production line, should I send IT Enable command, just like I did during the learning step?

  • +1
    TI__Guru 57697 points

    Hello Ali,

    The *.GG file does not contain all the learned information. The correct procedure is to read a SENC file after each step and program the SENC file. IT enable should be sent in production after all steps are complete but before sealing.