CC2564_15 Datasheet, PDF (24/47 Pages) Texas Instruments – Bluetooth® and Dual-Mode Controller

CC256x
SWRS121D – JULY 2012 – REVISED JANUARY 2014
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Table 3-14. L2CAP MTU Size
L2CAP MTU Size (Bytes)
Assisted A2DP sink: 260–800
Assisted A2DP source: 260–1021
Status
Supported
Supported
Item
A2DP content protection
AVDTP service
L2CAP mode
L2CAP flush
Table 3-15. Miscellaneous Parameters
Value
Protected
Basic type
Basic mode
Nonflushable
Status
Not supported
Supported
Supported
Supported
For detailed information on the A2DP profile, see the A2DP Profile Specification (www.bluetooth.org/enus/
specification/adopted-specifications).
3.5.4.2.1 Assisted A2DP Sink
The A2DP sink role is the receiver of the audio stream in an A2DP Bluetooth connection. In this role, the
A2DP layer and its underlying layers are responsible for link management and data decoding. To handle
these tasks, two logic transports are defined:
• Control and signaling logic transport
• Data packet logic transport
The assisted A2DP takes advantage of this modularity to handle the data packet logic transport in the
CC256x device by implementing a light L2CAP layer (L-L2CAP) and light AVDTP layer (L-AVDTP) to
defragment the packets. Then the assisted A2DP performs the SBC decoding on-chip to deliver raw audio
data through the CC256x PCM–I2S interface. Figure 3-17 shows the comparison between a common
A2DP sink architecture and the assisted A2DP sink architecture.
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