SBAA415 April   2020 PCM6240-Q1 , PCM6260-Q1 , PCM6340-Q1 , PCM6360-Q1

 

  1.   Multiple PCM6xx0 Devices With Shared TDM and I2C Bus
    1.     Trademarks
    2. 1 Introduction
    3. 2 Sharing the Control Bus
    4. 3 Sharing the Audio Bus
      1. 3.1 ASI Configuration for Shared TDM
      2. 3.2 ASI Configuration for Daisy Chain TDM
    5. 4 Configuring PurePath Console for Multiple PCM6xx0 EVMs
      1. 4.1 Changing the Default I2C Address of the PCM6xx0 EVM
      2. 4.2 Launching PurePath Console With Multiple Devices
  2.   A PurePath Console I2C Scripts
    1.     A.1 PCM6xx0 I2C Scripts for Shared TDM
    2.     A.2 PCM6xx0 I2C Scripts for Daisy Chain TDM

Launching PurePath Console With Multiple Devices

When PurePath Console is launched, it queries the user on how many devices are connected to an AC-MB, as shown in Figure 21. In this dialog window, after selecting two PCM6xx0 devices and clicking on next, the main window shown in Figure 22 launches.

PPC PCM Device Select.pngFigure 21. PurePath Console Input Number of Devices Dialog

PurePath Console configures only one device at a time. The devices are labeled by a device icon with a letter at the top of the screen, as shown in Figure 22. Clicking on device icon A programs the lower number I2C address, B programs the next I2C address, and so forth.

PPC PCM Main Window.pngFigure 22. PurePath Console Main Window

The Audio Serial Bus tab assigns each channel of a device to a slot. In Figure 23, the device A input channels 1-4 are assigned to slots 0-3, respectively. In Figure 24, the device B input channels 1-4 are assigned to slots 4-7. Note that the previous slots in the TDM bus are not shown, but an ellipsis at the beginning of the audio interface signal line plot in BCLK, FSYNC, and SDOUT signifies that other slots precede these slots.

Slot0-5 PCM Mapping.pngFigure 23. PurePath Console Device A Channel to Slot Mapping
Slot6-11 PCM Mapping.pngFigure 24. PurePath Console Device B Channel to Slot Mapping

Clicking on the upper right window expansion icon of the Audio Serial Bus graphic shows all slots and all devices, as shown in Figure 25.

Slot0-11 PCM Mapping.pngFigure 25. PurePath Console Channel to Slot Mapping for Device A and B