Figure 2.1 shows the Core blocks, each with its associated communication protocol.
Link Manager, Link Controller and BR/EDR Radio blocks comprise a BR/EDR Controller.
An AMP PAL, AMP MAC, and AMP PHY comprise an AMP Controller.
Link Manager, Link Controller and LE Radio blocks comprise an LE Controller. L2CAP, SDP and GAP blocks comprise a BR/EDR Host.
L2CAP, SMP, Attribute protocol, GAP and Generic Attribute Profile (GATT) blocks comprise an LE Host.
A BR/EDR/LE Host combines the set of blocks from each respective Host.
Figure 2.1: Bluetooth core system architecture