DVK-BTM521 Laird Technologies, DVK-BTM521 Datasheet - Page 41

• Manufacturer Part Number: DVK-BTM521
• Description: BT MM DEV KIT
• Manufacturer: Laird Technologies
• Type: Transceiver, Bluetoothr

Specifications of DVK-BTM521

• Frequency: 2.4GHz
• Interface Type: RS-232
• Processor Series: BTM521
• Silicon Manufacturer: Laird Technologies
• Kit Application Type: Communication & Networking
• Application Sub Type: Bluetooth
• Kit Contents: Development Board & Software Tools
• Features: Supports CSR
• Rohs Compliant: Yes
• For Use With/related Products: BTM521
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DVK-BTM521

BTM520/521
Bluetooth
AT COMMAND SET
REFERENCE
41 www.lairdtech.com
®
Multimedia Plus Module
3.3 Enable A2DP
3.4 Select A2DP Role
Figure 3.15: A2DP Example 2 – Accepting Connection and Volume Adjustment Device A (Sink)
The advanced audio distribution profile (A2DP) is enabled by issuing ATS102=128. After verifying
that a role has been set (S300 != 0) the S registers must be saved by AT&W. Finally issue ATZ to
make the new settings effective. If the A2DP flag in S102 (0x80) is not set after ATZ although it
was set and saved before ATZ, then S300 was = 0 at boot time, which is invalid for A2DP.
The A2DP role is selected by S register 300 as follows:
0 – no role selected
1 – A2DP Sink (default)
2 – A2DP Source
The setting must be saved by AT&W and becomes effective on next power cycle (ATZ).
CAUTION: If S 300=0 at boot time (no role selected) and the A2DP flag (0x80) is set in S102,
the A2DP flag will be cleared automatically because A2DP cannot be enabled without a role selected.
Figure 3.14: A2DP Example 2 –Initiate and Release Connection from Device B (Source)
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