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manifest: update zephyr to contain nrf21540 tx-en timing fix #21701

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merged 2 commits into from
Apr 14, 2025
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manifest: update zephyr to contain nrf21540 tx-en timing fix #21701

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2cabe04
manifest: update zephyr to contain nrf21540 tx-en timing fix
ankuns Apr 11, 2025
61bd2af
doc: nrf21540 update recommended timing values for nrf54l
ankuns Apr 11, 2025
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6 changes: 5 additions & 1 deletion doc/nrf/app_dev/device_guides/fem/fem_nrf21540_gpio.rst
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Expand Up @@ -84,7 +84,11 @@ To use nRF21540 in GPIO mode, complete the following steps:
The nRF54L devices contain only four PPIB channels between PERI Power Domain and Low Power Domain.
Due to this limitation, only two out of three pins from group ``tx-en-gpios``, ``rx-en-gpios`` and ``pdn-gpios`` (for example, ``tx-en-gpios`` and ``rx-en-gpios``) can be controlled by GPIO P0.
Select other GPIO port for the one remaining pin of the pin group (for example ``pdn-gpios``).
To ensure proper timing, set the ``tx-en-settle-time-us`` and ``rx-en-settle-time-us`` devicetree properties of the ``nrf_radio_fem`` node to the value ``12``.
To ensure proper timing, set the following devicetree properties of the ``nrf_radio_fem`` node:

* ``tx-en-settle-time-us`` to the value ``27``.
* ``rx-en-settle-time-us`` to the value ``12``.

Enable appropriate instances of the ``DPPIC`` and ``PPIB`` peripherals in the devicetree file:

.. code-block:: devicetree
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2 changes: 1 addition & 1 deletion west.yml
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Expand Up @@ -65,7 +65,7 @@ manifest:
# https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
- name: zephyr
repo-path: sdk-zephyr
revision: 59a8d2d1692d43086c0343e9ba87a800a2e93bc4
revision: 4575fc863ae46dc0f65593cb741660ddab1ba344
import:
# In addition to the zephyr repository itself, NCS also
# imports the contents of zephyr/west.yml at the above
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