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A2B Network Configuration Example:
WD1BZ (M) - WB1BZ (BPS) - WG1BZ (LPS) - WD1BZ (LPS)
Purpose
The purpose of this document is to guide the user on the steps required to configure an example
A2B network featuring Local Powered Slave (LPS) nodes using A2B evaluation boards.
Example Project:
•
Local Powered Slave <-> WD1BZ Local Powered Slave Using the ADAU1761 SigmaDSP
Audio CODEC (Bypassing the ADAU1452 SigmaDSP Audio Processor)
Revision
B
Added TDM8 XML file reference and LED table for bus drop off.
A
Contents
Purpose ................................................................................................................................................................................... 1
System and Software Requirements ....................................................................................................................................... 2
Hardware Requirements ......................................................................................................................................................... 2
Example Project 1 .................................................................................................................................................................. 3
Jumper Settings .................................................................................................................................................................. 3
Important Notes .................................................................................................................................................................. 4
Background why the above change is required .............................................................................................................. 5
Procedure............................................................................................................................................................................ 8
Audio Stream Assignments ................................................................................................................................................ 8
Note on Slave Evaluation Boards ....................................................................................................................................... 9
WD1BZ Local Powered Master <-> WB1BZ Bus Powered Slave <-> WG1BZ
REVISION HISTORY
Description of Change
Initial Release
Date
Author
August 26
th
, 2021
ADI
Page 1 of 9
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Summary of Contents for Analog Devices WD1BZ
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Page 1: Table Of Contents
A2B network featuring Local Powered Slave (LPS) nodes using A2B evaluation boards. Example Project: • WD1BZ Local Powered Master <-> WB1BZ Bus Powered Slave <-> WG1BZ Local Powered Slave <-> WD1BZ Local Powered Slave Using the ADAU1761 SigmaDSP Audio CODEC (Bypassing the ADAU1452 SigmaDSP Audio Processor) REVISION HISTORY Revision... -
Page 2: System And Software Requirements
Version Comments Copy the DLL’s (A2B.DLL, A2BStack.DLL) into SigmaStudio A2B Software* 19.4.0* Installation Directory. Refer to the A2B Quick Start Guide for more details (C:\Analog Devices\ADI_A2B_Software-Rel19.4.0\Docs) SigmaStudio 4.6 product page: SigmaStudio 4.6* https://www.analog.com/en/design-center/evaluation-hardware- and-software/software/ss_sigst_02.html#software-overview *Please contact A2B SW team for latest updates. -
Page 3: Example Project 1
Example Project 1 WD1BZ (Master) <-> WB1BZ (BPS) <-> WG1BZ (LPS) <-> WD1BZ (LPS) Node Using the ADAU1761 SigmaDSP Audio CODEC (Bypassing the ADAU1452 SigmaDSP Audio Processor) Jumper Settings Place the jumpers on WD1BZ Master and WD1BZ LPS boards as per the tables below. -
Page 4: Important Notes
1. WB1BZ and WG1BZ have similar digital BOM section (the signal routing path is almost identical). Hence, boards can be swapped with each other in the A2B discovery chain. 2. WD1BZ LPS board can also be swapped with any of the above boards, but that would require some minor software modifications. -
Page 5: Background Why The Above Change Is Required
In WD1BZ schematics, there is no A2B CLKOUT signal connection to the ADAU1761 CODEC, unlike in WB1BZ and WG1BZ boards. As shown in the picture below, in the WD1BZ board, only the AD2428_BCLK signal can be connected to the MCLK, and since the CODEC MCLK needs to run at 12.288MHZ, TDM8 must be selected. - Page 6 Since on WB1BZ and WG1BZ boards, ADR2/CLKOUT A2B transceiver pin can serve as an additional MCLK generator to the connected DAC’s/ CODEC, the above restriction is not applicable. See picture below. Therefore, the TDM settings are kept the same for the WB1BZ and WG1BZ boards. Page 6 of 9...
- Page 7 As stated earlier, users can swap WB1BZ and WG1BZ boards without any issue in the A2B chain. But when swapping with a WD1BZ as a LPS node, make sure the TDM mode is changed from TDM2 to TDM8. The CLKOUT parameter is a “don’t care” in the WD1BZ device property settings, as there is no physical connection on this particular board from the ADR2/CLKOUT A2B transceiver pin to the CODEC MCLK pin.
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Page 8: Procedure
Procedure 1. Make the hardware connections as follows: WD1BZ (Master) <-> WB1BZ (BPS) <-> WG1BZ (LPS) <-> WD1BZ (LPS) using UTP cables. 2. Make sure the jumpers are configured as per the tables above. 3. Open the A2B schematics: A2BSchematics/Jabra A2B_4_node_D1_B1_G1_D1.dspproj 4. -
Page 9: Note On Slave Evaluation Boards
By default, in the upstream direction, upstream slot0 and slot1 (from WGZ and WD1BZ LPS) will be played over the L and R channels of the headphones connected to the Master node. To hear the upstream slot2 audio channel added by the WB1BZ node, open the ADAU1452 project file, Link Compile Connect and change the MUX selection as shown below.
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