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

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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]

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).