Can a quad-spi flash chip be written at a same time that the code is run from it?

Jukka Lamminm�ki · ‎2017-05-22

Posted on May 22, 2017 at 14:30

We are investigating for a new STM32F7 based device with QSPI FLASH as a main memory to run the application from (XIP).

We also need FLASH memory for mass storage, and what is not clear for us is if we can use the same QSPI memory chip for mass storage also. I.e. can we write/read the QSPI chip at the same time that we are running the code from it?

Best regards, Jukka

#xip #quad-spi

Tesla DeLorean · ‎2017-05-22

Posted on May 22, 2017 at 16:32

My expectation would be NO.

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Jukka Lamminm�ki · ‎2017-05-22

Posted on May 23, 2017 at 05:35

Thanx Clive, that was my assumption also.

Maybe retreating running to internal flash while reading and writing the mass storage in QSPI flash, but that would be too complicated when running the real-time OS.

Much easier would be to attach the simple SPI flash for file system.