Not working STM32U585 QUADSPI interface with external flash(NOR) in memory mapped mode

[Vijay_kumar]

Hi folks,

I am facing one issue for  external flash in memory map mode, I am using stm32U585 . I am unable to write/read/access external flash(NOR) while in memory mode. but in Indirect memory mode  all actions are working.

but in manual they have given as shown below. 

its showing not recommended, but its not like its not possible. anyone can help me ,  how can I achieve OCTOSPI1 (QUADSPI) interface in memory map mode. 

[KDJEM.1 · Accepted solution]

Hello @Vijay_kumar and welcome to the community,

Could you precise which QUAD memory are you using?

I advise you to look at the errata sheet for memory-mapped errata

• Memory-mapped write error response when DQS output is disabled
• Data write discarded in memory-mapped mode if a write to a misaligned address is directly
  followed by a request to the same address

The AN5050 provides some typical OCTOSPI implementation examples may help you.

Thank you.

Kaouthar