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Is it possible to update the QSPI LUT entry using the PBL

Question asked by Raymond Haas on Jul 16, 2018
Latest reply on Aug 15, 2018 by alexander.yakovlev

I was hoping to change the default LUT entry used to access the QSPI.  I would like to be able to read the device faster. Is it possible to add PBI commands to unlock the LUT, modify the first (default) entry, and lock the LUT?

 

My code copies itself from QSPI to ISRAM.  This works well, but I have rather tight boot up time requirements. I was hoping to shorten the copy time by configuring the default LUT entry for fast quad read cycles.

 

If altering the default LUT using the PBL is not possible, is it possible to change the LUT while I am executing from the part?  It seems to me that would not be recommended.

 

FYI, I am using an LS1021a.

 

Thank you for your help

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