SLAU628 August   2020 DRV5825P


  1.   Abstract
  2.   Trademarks
  3. 1Hardware Overview
  4. 2Hardware Setup
  5. 3Schematic
  6. 4Board Layouts
    1. 4.1 Bill of Materials

Hardware Setup

Use the following steps when setting up the hardware:

  1. Connect the piezo speakers (or equivalent load) to the DRV5825PEVM.

  2. Connect a PSU to the DRV5825PEVM to PVDD (J23) and GND (J24) between 4.5 V and 26.4 V. The 5-V and 3.3-V LEDs (Yellow) should illuminate and the USB Lock LED (Blue) should also be illuminated.

  3. Plug in a USB cable from the computer with the PPC3™ GUI to the EVM.

  4. If an optical S/PDIF source is used, the blue S/PDIF clock-locked LED is illuminated, S1 should be toggled to S/PDIF.

I2C Device Address

The default I2C addresses on the EVM are set to 0x98 for top device (U18) and 0x9A for the bottom device (U21).

Board-Level Troubleshooting

It is suggested to perform a power cycle, disconnect both the USB cable and the power supply from the board. To make sure the devices are properly initialized, TI recommends checking if the output is switching (square wave).

When XMOS is chosen as the audio source, the Windows 10 OS may have issues recognizing the correct USB audio driver.

Follow these steps to ensure the correct USB audio driver:

  1. Navigate to Control Panel\All Control Panel Items

  2. Select "Sound "

  3. Under the "Playback" tab

    1. Right-click on "TI USB Audio UAC2.0"

    2. Select "Properties"

  4. Navigate to the "Advanced" tab

    1. Ensure the "Default Format" is "24 bit, 48000 Hz (Studio Quality)"

    2. If the "Advanced" tab is not found, this is the incorrect driver.

Follow this set of steps to attain the correct USB audio driver:

  1. Change to another USB of the computer, follow the previously-listed steps to see if this resolves the issue. If not, please continue to the following step.

  2. To have the correct USB audio driver recognized by the computer:

    1. Navigate to "Device Manager".

    2. Expand "Sound, video and game controllers"

    3. Right click on "TI USB Audio UAC2.0"

      1. Select "Uninstall Device"

    4. Unplug USB and re-plug in the USB into the computer. This will allow the correct driver to be recognized by the computer.

Last but not least, ensure that the computer audio source: "Speakers (TI USB Audio UAC2.0)" is set to 100%.