Selection and Solution Guides

Application Notes

Solving Enumeration Errors in USB Audio DAC and CODEC Designs


TI’s portfolio of audio digital-to-analog converters (DACs) and coder/decoders (codecs) with integrated USB interfaces offers an excellent building block for any streaming USB audio system. When designing with the PCM270x and PCM29xx devices, careful attention must be given to both the clocking and USB hardware configurations in order to ensure proper host to device communication. This application report outlines two common design mistakes that can lead to enumeration errors between the host and device. Concise descriptions are provided to help diagnose and correct enumeration errors so that designers can move forward with the overall system architecture process.