How to configure SPI pins on nRF54L15

RE: How to configure SPI pins on nRF54L15

Vidar Berg — Wed, 24 Sep 2025 13:39:56 GMT

I see, thanks for confirming. If you are using SPIM instance 20 or 21 , please also check if you get the same result in debug interface mode or if you enable constant latency: https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/chapters/pin.html#d380e188

RE: How to configure SPI pins on nRF54L15

Thomas Alex — Wed, 24 Sep 2025 13:31:36 GMT

5V is supplied from the nRF board itself (P5V0 - used to be VBUS)
The 5V is going to the peripheral device and regulated down to 1.8V.

SPI works on 1.8V as I provide VIO to VDDIO (which is 1.8V)

RE: How to configure SPI pins on nRF54L15

Vidar Berg — Wed, 24 Sep 2025 13:16:14 GMT

Where is the 5V being supplied? This is well above the maximum voltage the chip is rated for.

RE: How to configure SPI pins on nRF54L15

Thomas Alex — Wed, 24 Sep 2025 12:47:28 GMT

Nope, my SPI device works with 1.8V. In fact, I connect VDDIO from nRF54 to the VIO pin on my SPI device. I can maybe put up the pin numbers I'm using here in case anything obvious jumps out to you

SCLK -> Port2 pin 1
MOSI -> Port2 pin 2
MISO -> Port2 pin 4
CS1 -> Port2 pin 10
CS2 -> Port2 pin 5
INT1_1 -> Port1 pin 8
INT1_2 -> Port1 pin 9

VDD -> 5V

VIO -> VDDIO (1.8V)
GND -> GND

RE: How to configure SPI pins on nRF54L15

Vidar Berg — Wed, 24 Sep 2025 12:40:21 GMT

Thanks for confirming that it worked, and sorry for missing the --batch-path argument. I will edit my first post to correct this.

[quote user="Thomas Alex"]I'm having another issue with the data coming through the SPI. It doesnt seem to work on the 4 nRF54 boards I have, but works on the 5th one. But anyway, thanks for the command[/quote]

Could it be related to the VDD configuration? Is the SPI device supplied by the same VDD as the nRF, and does it support running at 1.8v? This nrfutil command will overwrite any configurations that you have previously set in the board configurator app.

RE: How to configure SPI pins on nRF54L15

Thomas Alex — Wed, 24 Sep 2025 10:32:32 GMT

Thank you. Seems to work! Have to add --batch-path flag before pointing the json file, though

I'm having another issue with the data coming through the SPI. It doesnt seem to work on the 4 nRF54 boards I have, but works on the 5th one. But anyway, thanks for the command

RE: How to configure SPI pins on nRF54L15

Vidar Berg — Fri, 19 Sep 2025 06:28:22 GMT

Hello,

The board configurator app has not been updated yet to support rerouting of the SPI lines, but it is possible to apply this configuration using nrfutil for now. The nrfutil command is:

nrfutil device x-execute-batch --traits boardController --batch-path nrf54l15dk_reroute_spi_flash_pins.json

And the json (I tried to match it to the configuration from your screenshot):

devzone.nordicsemi.com/.../nrf54l15dk_5F00_reroute_5F00_spi_5F00_flash_5F00_pins.json

This sets pin 47 high which is the control signal for the SPI flash lines

Best regards,

Vidar

Update:

This configuration is now supported in the app as well: