:orphan:

.. title:: BT_CTLR_FEM_NRF21540

.. option:: CONFIG_BT_CTLR_FEM_NRF21540

*nRF21540 GPIO interface*

Type: ``bool``

Help
====

.. code-block:: none

    Enable PDN and CSN GPIO interface for the nRF21540. This allows
    hardware designs using the nRF21540 to let the controller toggle
    their state based on radio activity.

Direct dependencies
===================

!\ :option:`SOC_SERIES_NRF51X <CONFIG_SOC_SERIES_NRF51X>` && \ :option:`BT_LL_SW_SPLIT <CONFIG_BT_LL_SW_SPLIT>` && \ :option:`BT_CTLR <CONFIG_BT_CTLR>` && \ :option:`BT_HCI <CONFIG_BT_HCI>` && \ :option:`BT <CONFIG_BT>`

*(Includes any dependencies from ifs and menus.)*

Defaults
========

No defaults. Implicitly defaults to ``n``.

Symbols selected by this symbol
===============================

- \ :option:`BT_CTLR_GPIO_PA <CONFIG_BT_CTLR_GPIO_PA>`
- \ :option:`BT_CTLR_GPIO_LNA <CONFIG_BT_CTLR_GPIO_LNA>`

Kconfig definition
==================



At ``<Zephyr Subsystem>/bluetooth/controller/Kconfig.ll_sw_split:689``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:34`` → ``<Zephyr Subsystem>/Kconfig:9`` → ``<Zephyr Subsystem>/bluetooth/Kconfig:307`` → ``<Zephyr Subsystem>/bluetooth/controller/Kconfig:633``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → Bluetooth Controller

.. code-block:: kconfig

    menuconfig BT_CTLR_FEM_NRF21540
    	bool "nRF21540 GPIO interface"
    	select BT_CTLR_GPIO_PA
    	select BT_CTLR_GPIO_LNA
    	depends on !SOC_SERIES_NRF51X && BT_LL_SW_SPLIT && BT_CTLR && BT_HCI && BT
    	help
    	  Enable PDN and CSN GPIO interface for the nRF21540. This allows
    	  hardware designs using the nRF21540 to let the controller toggle
    	  their state based on radio activity.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*