Writing to the QSPI flash while in user mode

[Will_Mc]

We have a question on the Agilex fpgas, AGIB027R31B2I2V. It is not clear if the FPGA can write to the external prom in ASx4 mode without a JTAG connection. UG-20205 section 3.2.1 shows the AS Configuration Scheme, which we follow. We will use the quartus prime programmer to program through the SDM of the FGPA to the flash memory on the board. UG-20205 Section 2.1 Figure 4 shows the Intel Agilex Configuration Timing Diagram. On power on, the MSEL pins are sampled. Our MSEL pins are setup for ASx4 Fast. At this point the FPGA is configured from the flash device, which is a read process from the flash. After this the FPGA is initialized and in user mode. While in User Mode, is it possible for the FPGA to write to the flash device? In this case, the JTAG pod is NOT attached to the board.

[FvM]

Yes, you can write configuration flash in user mode. All remote update examples do. Look for Generic Serial Flash Interface IP, alt_asmi or ASMI II IP.

[JingyangTeh · Accepted solution]

Hi

Yes you are able to like what the previous comment mentioned.

You could add the Generic Serial Flash Interface IP into your design and you could read or write to the Flash device in user mode.

https://www.intel.com/content/www/us/en/docs/programmable/683419/23-1-20-2-3/user-guide.html

Regards

Jingyang, Teh

[JingyangTeh]

Hi

Since this thread been resolve, I shall set this thread to close pending. If you still need further assistance, you are welcome to reopen this thread within 20days or open a new thread, some one will be right with you. Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.

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Regards

Jingyang, Teh