nRF5340 QSPI and external PSRAM

RE: nRF5340 QSPI and external PSRAM

Simonr — Wed, 22 Nov 2023 11:50:05 GMT

The instruction set supported by the nRF5340 is specified in the product spec here: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf5340%2Fqspi.html&anchor=instruction_set

Most of them seem to also be supported by the S25HS you want to use, except dual and quad program I/O and exiting deep power-down mode.

The flash should indeed be supported by the QSPI peripheral of the nRF5340 though as long as you stick to the supported instructions. You can also create custom instructions with the nrfx_qspi_cinstr functions in our driver to accommodate for other instructions, but this will not be run at the full QSPI speed you can expect for the hard coded instructions.

Best regards,

Simon

RE: nRF5340 QSPI and external PSRAM

valeriy_simakov — Mon, 20 Nov 2023 10:32:14 GMT

Sigurd Hellesvik

RE: nRF5340 QSPI and external PSRAM

valeriy_simakov — Mon, 20 Nov 2023 06:45:20 GMT

Could you please tell me, does it available now?

RE: nRF5340 QSPI and external PSRAM

valeriy_simakov — Thu, 16 Nov 2023 15:13:13 GMT

OK
devzone.nordicsemi.com/.../Infineon_2D00_S25HS256T.pdf
Or by link:
www.infineon.com/.../Infineon-S25HS256T_S25HS512T_S25HS01GT_S25HL256T_S25HL512T_S25HL01GT_256_Mb_512_Mb_1_Gb_SEMPER_Flash_Quad_SPI_1_8_V_3-DataSheet-v69_00-EN.pdf

RE: nRF5340 QSPI and external PSRAM

Sigurd Hellesvik — Thu, 16 Nov 2023 07:45:55 GMT

I can not download the datasheet somehow. Can you try to upload it again, maybe with a shorter PDF name?

RE: nRF5340 QSPI and external PSRAM

valeriy_simakov — Wed, 15 Nov 2023 08:30:52 GMT

Hi,
The project has been suspended for a while and now we want to continue)
So, we want to use NOR flash, as external storage.

devzone.nordicsemi.com/.../Infineon_2D00_S25HS256T_5F00_S25HS512T_5F00_S25HS01GT_5F00_S25HL256T_5F00_S25HL512T_5F00_S25HL01GT_5F00_256_5F00_Mb_5F00_512_5F00_Mb_5F00_1_5F00_Gb_5F00_SEMPER_5F00_Flash_5F00_Quad_5F00_SPI_5F00_1_5F00_8_5F00_V_5F00_3_2D00_DataSheet_2D00_v69_5F00_00_2D00_EN.pdf

But as I understand from datasheet we nRF supports only hardcoded instruction set (table 119, NRF5340-QKAA-R7_Nordic_Semiconductor_ASA).
Could you please verify the compatibility with flash above?

RE: nRF5340 QSPI and external PSRAM

valeriy_simakov — Thu, 05 Oct 2023 11:21:51 GMT

Thanks for your reply!

RE: nRF5340 QSPI and external PSRAM

Turbo J — Thu, 05 Oct 2023 06:37:03 GMT

Read the QSPI chapter in the PS, this peripherial is tailored around a specific set of NOR flash chips with hard coded commands. Not sure if it is possible to use a PSRAM chip here.

Your use case sounds like you could use regular SPI and just (Easy-)DMA the data in and out manually. A MicroSD card may be cheaper than a PSRAM chip in the MB range.