:orphan:

.. _nordic_nrf21540_fem:

nordic,nrf21540-fem
###################

Vendor: :ref:`Nordic Semiconductor <dt_vendor_nordic>`

Description
***********



.. code-block:: none

   This is a representation of the nRF21540 Radio Front-End module

Properties
**********

.. tabs::

   .. group-tab:: Node specific properties

      Properties not inherited from the base binding file.

      .. list-table::
         :widths: 1 1 4
         :header-rows: 1

         * - Name
           - Type
           - Details

         * - ``tx-en-gpios``
           - ``phandle-array``
           - .. code-block:: none

                Gpio of the SOC controlling TX_EN pin of the nRF21540



         * - ``rx-en-gpios``
           - ``phandle-array``
           - .. code-block:: none

                Gpio of the SOC controlling RX_EN pin of the nRF21540



         * - ``pdn-gpios``
           - ``phandle-array``
           - .. code-block:: none

                Gpio of the SOC controlling PDN pin of the nRF21540



         * - ``ant-sel-gpios``
           - ``phandle-array``
           - .. code-block:: none

                Gpio of the SOC controlling ANT-SEL pin of the nRF21540



         * - ``mode-gpios``
           - ``phandle-array``
           - .. code-block:: none

                Gpio of the SOC controlling MODE pin of the nRF21540



         * - ``spi-if``
           - ``phandle``
           - .. code-block:: none

                Reference to the nordic,nrf21540-fem-spi SPI bus interface.
                This must be present to support SPI control of the FEM.



         * - ``tx-en-settle-time-us``
           - ``int``
           - .. code-block:: none

                Settling time in microseconds from state PG to TX.
                Default value is based on Table 6 of the nRF21540 Product Specification (v1.0), and can be overridden for tuned configurations.



             Default value: ``11``

         * - ``rx-en-settle-time-us``
           - ``int``
           - .. code-block:: none

                Settling time in microseconds from state PG to RX.
                Default value is based on Table 6 of the nRF21540 Product Specification (v1.0), and can be overridden for tuned configurations.



             Default value: ``11``

         * - ``pdn-settle-time-us``
           - ``int``
           - .. code-block:: none

                Settling time in microseconds from state PD to PG.
                Default value is based on Table 6 of the nRF21540 Product Specification (v1.0), and can be overridden for tuned configurations.



             Default value: ``18``

         * - ``trx-hold-time-us``
           - ``int``
           - .. code-block:: none

                Power-off time in microseconds when changing from RX or TX to PG.
                Default value is based on Table 6 of the nRF21540 Product Specification (v1.0), and can be overridden for tuned configurations.



             Default value: ``3``



   .. group-tab:: Deprecated node specific properties

      Deprecated properties not inherited from the base binding file.

      (None)

   .. group-tab:: Base properties

      Properties inherited from the base binding file, which defines
      common properties that may be set on many nodes. Not all of these
      may apply to the "nordic,nrf21540-fem" compatible.

      .. list-table::
         :widths: 1 1 4
         :header-rows: 1

         * - Name
           - Type
           - Details

         * - ``status``
           - ``string``
           - .. code-block:: none

                indicates the operational status of a device


             Legal values: ``'ok'``, ``'okay'``, ``'disabled'``, ``'reserved'``, ``'fail'``, ``'fail-sss'``

             See :ref:`dt-important-props` for more information.

         * - ``compatible``
           - ``string-array``
           - .. code-block:: none

                compatible strings


             This property is **required**.

             See :ref:`dt-important-props` for more information.

         * - ``reg``
           - ``array``
           - .. code-block:: none

                register space


             See :ref:`dt-important-props` for more information.

         * - ``reg-names``
           - ``string-array``
           - .. code-block:: none

                name of each register space


         * - ``interrupts``
           - ``array``
           - .. code-block:: none

                interrupts for device


             See :ref:`dt-important-props` for more information.

         * - ``interrupts-extended``
           - ``compound``
           - .. code-block:: none

                extended interrupt specifier for device


         * - ``interrupt-names``
           - ``string-array``
           - .. code-block:: none

                name of each interrupt


         * - ``interrupt-parent``
           - ``phandle``
           - .. code-block:: none

                phandle to interrupt controller node


         * - ``label``
           - ``string``
           - .. code-block:: none

                Human readable string describing the device (used as device_get_binding() argument)


             See :ref:`dt-important-props` for more information.

         * - ``clocks``
           - ``phandle-array``
           - .. code-block:: none

                Clock gate information


         * - ``clock-names``
           - ``string-array``
           - .. code-block:: none

                name of each clock


         * - ``#address-cells``
           - ``int``
           - .. code-block:: none

                number of address cells in reg property


         * - ``#size-cells``
           - ``int``
           - .. code-block:: none

                number of size cells in reg property


         * - ``dmas``
           - ``phandle-array``
           - .. code-block:: none

                DMA channels specifiers


         * - ``dma-names``
           - ``string-array``
           - .. code-block:: none

                Provided names of DMA channel specifiers


         * - ``io-channels``
           - ``phandle-array``
           - .. code-block:: none

                IO channels specifiers


         * - ``io-channel-names``
           - ``string-array``
           - .. code-block:: none

                Provided names of IO channel specifiers