QSPI page size compability?

[SebastianA]

We are adding  an external QSPI flash memory to one of our designs and want to use XIP.

I'm looking at the datasheet of one of the considered flash memories (https://www.renesas.com/us/en/document/dst/at25sf161b-datasheet) to figure out if they are compatible and there I see that the page size is 4096 bytes. The QSPI peripheral seem to only support 256 and 512 byte pages in its IFCONFIG0 register.

Does that matter or can we just lie in software and ask it to erase 256/512 bytes when we want to erase a full page or will that interfere with caching or XIP?

Is there a list somewhere of supported flash memories?

[Simonr]

Hi

From what I can see in the datasheet you uploaded the page size is defined as 256 bytes. Where exactly do you get 4096 from? I think 256 and 512 should cover most of the "regular" QSPI NOR flash devices out there.

From what I can tell the flash device you link to supports the nRF52840.

Best regards,

Simon

[SebastianA]

Thanks!

I misread the documentation. Its the PP and related commands that are configured to use 256 or 512 bytes, not the block/sector erase command.