How to configure and use nRF9160DK external flash mx25r6435f

RE: How to configure and use nRF9160DK external flash mx25r6435f

Liza — Fri, 21 Mar 2025 02:21:21 GMT

Dear Dejan,

Got it. Thanks.

Best regards,

Liza

RE: How to configure and use nRF9160DK external flash mx25r6435f

dejans — Thu, 20 Mar 2025 10:20:04 GMT

Hi,

Before programming board controller to nrf52840, PROG/DEBUG SW10 switch needs to be set to nRF52 position. nRF52840 controls analog switches on nrf9160-dk. To enable this control, you need to have board controller firmware flashed on nrf52840. It is board controller firmware which by default enables pin routing to external flash.
On nrf9160-dk, it is EXT_MEM_CTRL signal on nrf52840 which controls whether nrf9160 is connected to external flash or not.

You can find more information about board controller in the documentation.

Best regards,
Dejan

RE: How to configure and use nRF9160DK external flash mx25r6435f

Liza — Wed, 19 Mar 2025 03:38:14 GMT

I bind mx25r6435f and read&write successfully. But I do not know what makes it success. Turning SW10 to nrf52 and build nrf52 board, or program board controller firmware (nrf9160_dk_board_controller_fw_2.0.1.hex)?

RE: How to configure and use nRF9160DK external flash mx25r6435f

Liza — Tue, 18 Mar 2025 01:46:37 GMT

Dear Dejan,

I have followed the configuration.

I build the nrf9160dk_nrf9160_ns board and failed to bind with mx25r6435f ("--ERROR: Flash device is not ready--“). Here is my files.devzone.nordicsemi.com/.../3580.nrf9160dk_5F00_nrf9160_5F00_ns.overlay devzone.nordicsemi.com/.../8032.storage.txt

I learned from other post. Should I build nrf9160dk_nrf52840 board first to open the external flash?

Thanks,

Liza

RE: How to configure and use nRF9160DK external flash mx25r6435f

dejans — Mon, 17 Mar 2025 13:38:45 GMT

Hi Liza,

You could follow external flash documentation which shows Kconfig and devicetree configuration.

Best regards,
Dejan

RE: How to configure and use nRF9160DK external flash mx25r6435f

Liza — Mon, 17 Mar 2025 08:17:12 GMT

Because we use only nrf9160 sip on our final board, so if there has any method that will not use nrf52840?