:orphan:

.. title:: CONFIG_BT_CTLR_XTAL_THRESHOLD

.. kconfig:: CONFIG_BT_CTLR_XTAL_THRESHOLD

CONFIG_BT_CTLR_XTAL_THRESHOLD
#############################

*Crystal shutdown threshold in uS*

Type: ``int``

Help
====

.. code-block:: none

    Configure the optimal delta in micro seconds between two consecutive
    radio events, event done to next preparation, below which (active
    clock) crystal will be retained. This value is board dependent.

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

\ :kconfig:`BT_CTLR_XTAL_ADVANCED <CONFIG_BT_CTLR_XTAL_ADVANCED>` && \ :kconfig:`BT_LL_SW_SPLIT <CONFIG_BT_LL_SW_SPLIT>` && \ :kconfig:`BT_CTLR <CONFIG_BT_CTLR>` && \ :kconfig:`BT_HCI <CONFIG_BT_HCI>` && \ :kconfig:`BT <CONFIG_BT>`

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

Default
=======

- 1500

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



At ``<Zephyr Subsystem>/bluetooth/controller/Kconfig.ll_sw_split:297``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:9`` → ``<Zephyr Subsystem>/bluetooth/Kconfig:175`` → ``<Zephyr Subsystem>/bluetooth/controller/Kconfig:659``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → Bluetooth Controller → Advanced features → Advanced event preparation

.. code-block:: kconfig

    config BT_CTLR_XTAL_THRESHOLD
    	int "Crystal shutdown threshold in uS" if BT_CTLR_ADVANCED_FEATURES
    	default 1500
    	depends on BT_CTLR_XTAL_ADVANCED && BT_LL_SW_SPLIT && BT_CTLR && BT_HCI && BT
    	help
    	  Configure the optimal delta in micro seconds between two consecutive
    	  radio events, event done to next preparation, below which (active
    	  clock) crystal will be retained. This value is board dependent.

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