CC2560A Datasheet, PDF (34/52 Pages) Texas Instruments – Dual-Mode Bluetooth Controller

CC2560A NRND; CC2564 NRND
CC2560A, CC2560B, CC2564, CC2564B
SWRS121E – JULY 2012 – REVISED JANUARY 2016
www.ti.com
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
CC256x device. First, the assisted A2DP encodes the raw data from the CC256x PCM–I2S interface
using an on-chip SBC encoder. The assisted A2DP then 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.
A2DP Source Architecture
Assisted A2DP Source Architecture
Host Processor
Bluetooth Stack
A2DP
Profile
SBC
PCM
/
I2S
44.1 KHz
48 KHz
16 bits
Audio
CODEC
Host Processor
Bluetooth Stack
A2DP
Profile
Control
AVDTP
L2CAP
Data
Control
AVDTP
L2CAP
HCI
Control Data
HCI
CC256x
Bluetooth Controller
HCI
Control
Data
HCI
PCM
/
I2S
CC256x
Bluetooth Controller ^SBC
L-AVDTP
L-L2CAP
44.1 KHz
48 KHz
16 bits
Audio
CODEC
Figure 6-17. A2DP Source Architecture Versus Assisted A2DP Source Architecture
For more information on the A2DP source role, see the A2DP Profile Specification at Adopted Bluetooth
Core Specifications.
6.5 Bluetooth BR/EDR Features
The CC2564B/CC2560B devices fully comply with the Bluetooth 4.0 specification up to the HCI level. The
CC2560B/CC2564B devices are compliant with the Bluetooth 4.1 specification up to the HCI layer (for
family members and technology supported, see Table 3-1):
• Up to seven active devices
• Scatternet: Up to 3 piconets simultaneously, 1 as master and 2 as slaves
• Up to two synchronous connection oriented (SCO) links on the same piconet
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Detailed Description
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