CONFIG_BLUETOOTH_CONTROLLER_XTAL_ADVANCED:

Enables advanced event preparation offset ahead of radio tx/rx, taking into account predictive processing time requirements in preparation to the event, like control procedure handling and CPU execution speeds. Crystal oscillator is retained between closely spaced consecutive radio events to reduce the overall number of crystal settling current consumptions.

This feature maximizes radio utilization in an average role event timeslice when they are closely spaced by using a reduced offset between preparation and radio event.

By disabling this feature, the controller will use a constant offset between the preparation and radio event. The controller will toggle crystal oscillator between two closely spaced radio events leading to higher average current due to increased number of crystal settling current consumptions.

Symbol:

BLUETOOTH_CONTROLLER_XTAL_ADVANCED

Type:

bool

Value:

“n”

User value:

(no user value)

Visibility:

“n”

Is choice item:

false

Is defined:

true

Is from env.:

false

Is special:

false

Prompts:

• “Advanced event preparation” if BLUETOOTH_CONTROLLER_ADVANCED_FEATURES (value: “n”)

Default values:

• y (value: “y”)
• Condition: (none)

Selects:

(no selects)

Reverse (select-related) dependencies:  

(no reverse dependencies)

Additional dependencies from enclosing menus and ifs:  

BLUETOOTH_HCI && BLUETOOTH && BLUETOOTH_CONTROLLER (value: “n”)

Locations:

• ../subsys/bluetooth/controller/Kconfig:194