WM8904ECS/R - Cirrus Logic

WM8904ECS/R Frequently Asked Questions (FAQs)

• What is the recommended layout and routing for the WM8904ECS/R?
  The recommended layout and routing for the WM8904ECS/R can be found in the Cirrus Logic application note AN235, which provides guidelines for PCB layout, component placement, and routing to ensure optimal performance and minimize noise and interference.
• How do I configure the WM8904ECS/R for different audio formats?
  The WM8904ECS/R can be configured for different audio formats using the I2C interface. The device has several registers that control the audio format, such as the Audio Format Register (AFR) and the Sample Rate Register (SRR). Refer to the datasheet and the Cirrus Logic application note AN234 for more information on configuring the device for different audio formats.
• What is the power consumption of the WM8904ECS/R?
  The power consumption of the WM8904ECS/R depends on the operating mode and the clock frequency. In typical operating conditions, the device consumes around 12mA in stereo playback mode and 6mA in mono playback mode. Refer to the datasheet for more information on power consumption and power management.
• How do I implement a mute function using the WM8904ECS/R?
  The WM8904ECS/R has a mute function that can be controlled using the MUTE pin. When the MUTE pin is pulled low, the device enters a low-power state and the audio output is muted. The mute function can also be controlled using the I2C interface by writing to the Mute Control Register (MCR).
• What is the maximum clock frequency supported by the WM8904ECS/R?
  The WM8904ECS/R supports clock frequencies up to 50MHz. However, the recommended clock frequency is 12.288MHz, which is the standard clock frequency for audio applications.