CC2564C Datasheet, PDF (37/52 Pages) Texas Instruments – CC2564C Dual-Mode Bluetooth Controller

www.ti.com
CC2564C
SWRS199A – APRIL 2016 – REVISED NOVEMBER 2016
A2DP Sink Architecture
Host Processor
Bluetooth Stack
A2DP
Profile
SBC
PCM
/
I2S
44.1 kHz
48 kHz
16 bits
Audio
codec
Assisted A2DP Sink Architecture
Host Processor
Bluetooth Stack
A2DP
Profile
Control
AVDTP
L2CAP
Data
Control
AVDTP
L2CAP
HCI
HCI
Control Data
HCI
CC256x
Bluetooth Controller
Contro
l
Data
HCI
CC256x
Bluetooth Controller
PCM
/
I2S
SBC
L-AVDTP
L-L2CAP
44.1 kHz
48 kHz
16 bits
Audio
codec
Copyright © 2016, Texas Instruments Incorporated
Figure 6-16. A2DP Sink Architecture Versus Assisted A2DP Sink Architecture
For more information on the A2DP sink role, see the A2DP Profile Specification at Adopted Bluetooth
Core Specifications.
6.4.4.2.2 Assisted A2DP Source
The role of the A2DP source is to transmit 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 encoding. 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
CC2564C device. First, the assisted A2DP encodes the raw data from the CC2564C PCM–I2S interface
using an on-chip SBC encoder. Then the assisted A2DP implements an L-L2CAP layer and an L-AVDTP
layer to fragment and packetize the encoded audio data. Figure 6-17 shows the comparison between a
common A2DP source architecture and the assisted A2DP source architecture.
Copyright © 2016, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: CC2564C
Detailed Description
37