Does nrf54L15 support PA?

[Август]

Hi，

    I am looking forward to ncs2.8.0, which was released last Friday. Today I tried nrf54l15 + 2-wire PA but failed to compile successfully.

sdk: ncs2.8.0

project: direct_test_mode

Reference Documentation: https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/fem/fem_simple_gpio.html

add document code to overlay

But I can't compile successfully, Can you give me some suggestions? Or does nrf54l15 + PA require special operations? Thanks

I looked up ncs2.8.0 nrf54l15 and there is no definition of RADIO_MODECNF0_RU_Msk.

[Einar Thorsrud]

Hi,

I have not been able to reproduce this. Using the direct_test_mode smaple from SDK 2.8.0 and adding only this to app.overlay and building for the nRF54L15 DK, the project builds without error:

/ {
	nrf_radio_fem: name_of_fem_node {
		compatible = "skyworks,sky66112-11", "generic-fem-two-ctrl-pins";
		ctx-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
		crx-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>;
	};
};

Have you done any other changes?

[Август]

Hi,

    Thanks, It's a good news for me. I didn't make any other changes.

    I didn't change app.overlay, I changed nrf54l15dk_nrf54l15_cpuapp.overlay

When using nRF54L15, app.overlay cannot be compiled and take effect, and nRF54L15 does not have uart0, so app.overlay needs to be modified. I don’t know why app.overlay does not take effect, so I used nrf54l15dk_nrf54l15_cpuapp.overlay

nsc2.8.0

vscode v1.81.1

nRF Connect for VS Code Extension Pack V2024.9.5

nRF Connect for VS Code v2024.11.75

I describe my operation in detail.

1. copy direct_test_mode project to desktop.

2. open direct_test_mode by vscode

3. add code to nrf54l15dk_nrf54l15_cpuapp.overlay

4. add build configuration 

Then this err will appear

Looking forward to your reply，thanks.

[Август]

Attached is my project

5001.direct_test_mode.zip

[Einar Thorsrud]

Hi,

I gave you an incorrect answer yesterday. FEM control is not yet supported, but support is planned. Note that when it becomes available, you should use GPIO port P1 rather than P0 for controlling the FEM.

[Август]

Hi，

Thanks，

Why P1? I read the latest specification and both P0 and P1 support GPIOTE.

    

[Einar Thorsrud]

That is because P0 is in the low power power domain and you will have a longer latency between the radio and P0 (note the ASYNC indication in the communication between the low power domain and the AMBA interconnect int he block diagram). This does not mean that using P0 cannot work and crossing domains is possible, but it may not be the best choise (amd as we have not finished the PA support I cannot say for sure now which limitations may exist in the final solution).