https://devzone.nordicsemi.com/f/nordic-q-a/64326/qspi-commands-differ-between-flash-chip-and-nrf52840I am working on a driver for the Adesto AT25QL641 QSPI Flash Memory chip. Comparing the hardcoded nRF52840 QSPI instruction set and the AT25QL641, they are 90% identical except for Quad-page program input/output (nRF52840 - 0x38 vs. AT25Q 0x33). Otheren-USTelligent Community 13Wed, 29 Jul 2020 21:37:16 GMThttps://devzone.nordicsemi.com/thread/262271?ContentTypeID=1Wed, 29 Jul 2020 21:37:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e866eead-3139-4420-a9f2-67fb9b3cc540jcondon<p>That is our current plan since we don&#39;t need full speed at the moment. It just sucks to have expected full speed via QSPI (I&#39;d like QPI) and be stopped because the instruction ID was&nbsp;etched into silicon.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/262267?ContentTypeID=1Wed, 29 Jul 2020 21:10:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a85cdf4a-b6b8-4263-98a7-f0156a05500eTurbo J<p>Do you need full write speed?</p> <p>If you can write a bit slower, just use PP or PP2O commands (single bit or dual bit write instead of 4-bit write mode).</p><div style="clear:both;"></div>