:orphan:

.. title:: BT_CTLR_XTAL_THRESHOLD

.. option:: CONFIG_BT_CTLR_XTAL_THRESHOLD

*Crystal shutdown threshold in uS*

Type: ``int``

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.

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

\ :option:`BT_CTLR_XTAL_ADVANCED <CONFIG_BT_CTLR_XTAL_ADVANCED>` && \ :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.)*

Default
=======

- 1500

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

.. highlight:: kconfig

At ``subsys/bluetooth/controller/Kconfig.ll_sw_split:253``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:34`` → ``subsys/Kconfig:9`` → ``subsys/bluetooth/Kconfig:240`` → ``subsys/bluetooth/controller/Kconfig:594``

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

.. parsed-literal::

    config BT_CTLR_XTAL_THRESHOLD
    	int "Crystal shutdown threshold in uS" if \ :option:`BT_CTLR_ADVANCED_FEATURES <CONFIG_BT_CTLR_ADVANCED_FEATURES>`
    	default 1500
    	depends on \ :option:`BT_CTLR_XTAL_ADVANCED <CONFIG_BT_CTLR_XTAL_ADVANCED>` && \ :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>`
    	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.)*