External QSPI with STM32H753

[DJ_IND]

Hi,

 

I am planning to use the external serial QSPI flash interface with STM32H753. Flash part number is MT25QL256ABA1EW7-0SIT or IS25LP064D-JKLE-TR. Operating voltage 3.3V at frequency of 80MHz DDR. Can you please let me know will there be any concern in using these memories or anything i need to take care in design

[KDJEM.1]

Hello @DJ_IND 

 

Could you share the memories datasheet?

To check whether a device is supported by the QUADSPI interface, you need to refer to the device datasheet. Then, check the command format and order shared in the device datasheet must be aligned with the command format and order mentioned in the STM32 reference.

Also, for the supported frequency, I advise you to refer to the memory datasheet and the STM32 datasheet to check the maximum allowed frequency. The adequate frequency must be supported by the memory and the interfaces. 

As mentioned in the STM32H753 datasheet, the OCTOSPI can support 100 MHz in DDR mode.

Also, you need to verify if the memory supported the DDR mode and the 3.3 V.

For the hardware recommendations, you can look at AN4938 "Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware development" precisely section 9.4.3 Quad serial parallel interface (QUADSPI)

 

Thank you.

Kaouthar