TIDUAZ3A November   2015  – July 2021

 

  1.   1
  2.   Resources
  3.   Features
  4.   Featured Applications
  5.   5
  6. 1System Description
    1. 1.1 TI WL1837MOD
    2. 1.2 TI PCM1808
    3. 1.3 TI PCM5101AQPWRQ1
    4. 1.4 TXS0108EPWR
    5. 1.5 TL1963A-33DCQT
    6. 1.6 TPS73618DBVT
  7. 2Block Diagram and System Design Theory
  8. 3Test Setup and Data
    1. 3.1 Regulatory Certification
    2. 3.2 WL1837MOD Time Synchronization
    3. 3.3 Multiroom Ultralow Synchronization Testing on Oscilloscope
  9. 4Getting Started
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 Gerber Files
    4. 4.4 Assembly Drawings
  10. 5Software Files
  11. 6Trademarks
  12. 7About the Author
  13. 8Revision History

2 Block Diagram and System Design Theory

Figure 2-1 shows the WL1837MOD audio multiroom cape block diagram.

GUID-A1674C91-AA8A-4D19-8866-409FC0EDBC69-low.gif Figure 2-1 WL1837MOD Audio Multiroom Cape Block Diagram

This wireless multiroom audio reference design combines the latest dual-Band TI WiLink 8 module WL1837MOD with all software building blocks required for a high-end streaming audio platform from StreamUnlimited.

Analog audio IN and OUT are provided, which supports sound reproduction at up to 384-kHz sampling frequency. Using technology that is co-developed by TI and StreamUnlimited Engineering, the audio is synchronized at few microseconds precision between multiple devices. The mainline Linux based SDK of StreamUnlimited combines this highly-accurate synchronization with a rich set of online music services, a customizable user interface offering both local control and display and control through IOS® and Android devices.

The cape is used with BeagleBone Black, as shown in Figure 2-1. The Host Processor AM335x is connected to WL1837MOD through SDIO bus (for WLAN IP) and UART (BT IP). For MFi Licensees, there is also a provision to connect MFi sub-pcb. There are 2-U.FL antenna ports where external antennas must be connected, and an onboard audio PLL provides a I2 S clock.