https://devzone.nordicsemi.com/f/nordic-q-a/116640/nrf5340-qspi-compatible-ram-chipHello, we have a following issue: we would like to use nRF5340 QSPI driver with external RAM to store measurements data. Power supply for PCB is 1,8V, so we tried to use APS6404L-SQRH. Unfortunately, APS does not provide a h05 command to read memory statusen-USTelligent Community 13Fri, 22 Nov 2024 11:02:36 GMThttps://devzone.nordicsemi.com/thread/511625?ContentTypeID=1Fri, 22 Nov 2024 11:02:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7afcf294-e78c-4e7a-b6d6-d6959cdc2aebTurbo J<p>The QSPI peripherial cannot be used as RAM, it can only be used as ROM in XIP mode.</p> <p>Read the PS, this peripherial is tailored for NOR flash usage and (almost) nothing else.</p> <p>Use NRF54H series if you needed more <em>RAM</em>.</p> <p>You could try using the QSPI &quot;custom instruction&quot; registers for writing, but this would very likely need custom code instead of using the shipped drivers. Note that I did not bother reading datasheets to be able to tell if thats even <em>possible</em> - that would trigger my hourly rates.</p> <p>If the chip supported regular 1-bit SPI mode - just use a normal SPIM to read/write data manually.</p><div style="clear:both;"></div>