https://devzone.nordicsemi.com/f/nordic-q-a/70971/qspi-sram-on-the-qspi-nrf-peripheralHi, We use the QSPI already very well for a flash device that has the correct commands. Now we want to use a SRAM, also QSPI prepared, but it has some other commands, there for the pheripheral will not communicate correctly. Is it possible to change theseen-USTelligent Community 13Wed, 27 Jan 2021 14:54:30 GMThttps://devzone.nordicsemi.com/thread/291558?ContentTypeID=1Wed, 27 Jan 2021 14:54:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5ec709bc-7b6a-48b0-ada8-bfc77318d271Jared<p>Hi,</p> <p>In general, you would have to use an external flash that has an<a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/qspi.html?cp=4_0_0_5_18_7#instruction_set"> instruction set that complies with the on-chip QSPI peripheral</a>. The QSPI peripheral commands are implemented in hardware, however we do have what we call&nbsp;<a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/qspi.html?cp=4_0_0_5_18_5#custom_instructions">custom commands</a>. Also, relevant thread <a href="https://devzone.nordicsemi.com/f/nordic-q-a/61079/is-it-possible-to-use-qspi-for-nand-flash-without-sr">here</a>.</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>