QSPI hardware incompatible?

RE: QSPI hardware incompatible?

Carl Richard — Fri, 21 Aug 2020 10:25:02 GMT

Hello again.

I can confirm that this is unresolvable. You are restricted to using the single line page programming for the flash memory device in question.

Please notify me if there is anything else I can help with.

Best regards,
Carl Richard

RE: QSPI hardware incompatible?

Carl Richard — Fri, 21 Aug 2020 08:54:09 GMT

My apologies, I misunderstood our documentation.

I will check if there is some way to configure this differently.

Best regards,
Carl Richard

RE: QSPI hardware incompatible?

robert0606 — Fri, 21 Aug 2020 08:38:01 GMT

Here are the noridc docs showing that page program does not send 0x02 when using 4 IO lines:

RE: QSPI hardware incompatible?

Carl Richard — Fri, 21 Aug 2020 08:22:09 GMT

Hello, Robert!

From what I can read in our documentation and in the documentation for the SST26VF016 the devices are compatible. Both the nRF52840 and the SST26VF016 use 0x02 for page programming and 0x38 to configure quad IO mode. The latter must be set on the external flash device as well as the nRF52840 prior to the transfers. As explained in the nRF52 QSPI documentation this can be done by sending custom instructions.

Hope this helps you solve the issue.

Best regards,
Carl Richard