WM8940KGEFL/V - Cirrus Logic

WM8940KGEFL/V Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the WM8940?
  The recommended power-up sequence is to apply VDD first, followed by VDDIO, and then the clock signal. This ensures that the internal voltage regulators are powered up correctly.
• How do I configure the WM8940 for a specific audio application?
  The WM8940 can be configured using the I2C or SPI interface. The device has several registers that control the audio settings, such as gain, mute, and routing. Refer to the datasheet for the register map and configuration details.
• What is the maximum input signal level that the WM8940 can handle?
  The maximum input signal level that the WM8940 can handle is 2.5Vrms. Exceeding this level may result in distortion or damage to the device.
• How do I optimize the WM8940 for low power consumption?
  To optimize the WM8940 for low power consumption, use the power-down modes, reduce the clock frequency, and adjust the voltage regulators. Additionally, use the dynamic voltage scaling feature to reduce power consumption during idle periods.
• What is the recommended layout and routing for the WM8940?
  The recommended layout and routing for the WM8940 involves keeping the analog and digital signals separate, using a solid ground plane, and minimizing the length of the clock signal traces. Refer to the datasheet for more detailed layout and routing guidelines.