Cirrus Logic provides a recommended layout and routing guide for the WM8521CH9GED in their application note AN231. It's essential to follow this guide to ensure optimal performance and minimize noise coupling.
The WM8521CH9GED supports various audio formats, including I2S, TDM, and SPDIF. Configuration is done through the device's control registers, which can be accessed via the I2C or SPI interface. Refer to the datasheet and programming guide for specific register settings and configuration examples.
The recommended power-up sequence for the WM8521CH9GED is to apply power to the analog supply (AVDD) first, followed by the digital supply (DVDD). This ensures that the analog circuitry is powered up before the digital logic. Additionally, the reset pin (RST) should be held low during power-up and then released after the supplies have stabilized.
Cirrus Logic provides a troubleshooting guide for the WM8521CH9GED in their application note AN233. This guide covers common issues, such as clocking and synchronization problems, audio artifacts, and digital interface errors. It also provides guidance on using debug tools, such as logic analyzers and oscilloscopes, to diagnose and resolve issues.
The WM8521CH9GED is a high-performance audio codec that can generate significant heat during operation. To ensure reliable operation, it's essential to provide adequate thermal management, such as heat sinks, thermal vias, and airflow. Cirrus Logic provides thermal management guidelines in their datasheet and application notes.
