13 Replies Latest reply on Jul 13, 2017 2:11 AM by winpennyjh_2588011

    S25FL256S Quad I/O Read problem

    winpennyjh_2588011

      Device: S25FL256SAGMF1000

         

      Hi!,

         

      I'm using an STM32F765 in Quad QSPI mode with the command QIOR (EBh) to read the S25FL256S.

         

      However, all bytes look like 0x88 !

         

      Is there a status read command I can use in QSPI mode ?

         

      The device is a new part and the problem is on more than one board.

         

      I have attached a signal trace of CS, SCK, IO0, IO1, IO2, IO3 (Read capture.png)

         

      What could be wrong please?