42.4 Bluetooth Link Controller
The APB interface provides access to internal register banks of the macro. These registers are programmed by the host (firmware) to set various configurations, trigger commands, read status, service interrupts and other functions.
All Bluetooth operations are carried out as transmit or receive tasks within the Link controller. There are several task controllers:
- Firmware – Firmware can trigger tasks by writing the task controller registers.
- Hardware Schedule Controller – This is Bluetooth 5.2 Bluetooth Low Energy advertisement scheduler controller (Adv. role).
- Hardware Scanner – This is Bluetooth 5.2 Bluetooth Low Energy advertisement scanner (Central role).
- Bluetooth Low Energy advertisement controller – This is Bluetooth 5.2 advertisement controller (Adv. role).
The requests from the task controllers are arbitrated and is carried out by the task controller.