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¶

BT_CTLR_XTAL_ADVANCED && (BT_LL_SW_SPLIT || BT_LL_SW_LEGACY) && BT_CTLR && BT_HCI && BT

(Includes any dependencies from ifs and menus.)

Default¶

1500

Kconfig definition¶

At subsys/bluetooth/controller/Kconfig:619

Included via Kconfig:8 → Kconfig.zephyr:44 → subsys/Kconfig:6 → subsys/bluetooth/Kconfig:161

Menu path: (Top) → Bluetooth → Bluetooth Controller → Advanced features → Advanced event preparation

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_LL_SW_LEGACY) && 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.)