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Serial NOR Flash read/write operation

VSASI1
Visitor

I need to read/write data into the external Serial NOR Flash (MX25U25645GMI00) via Quad SPI of STM32L412RB board using STM32CubeIDE.

  1. I was able to get the Device ID of the MX25U25645GMI00.
  2. I am unable to write/read data into the MX25U25645GMI0 in Auto Polling Mode.
  3. I need support in writing data using 2 or 4 I/O lines (I was able to pass the Write Enable Command and Chip Erase Command successfully).
  4. I need support in reading data using 4 I/O lines (But I get 255 or 136 dec in all the bytes of receive buffer).
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