The Cirrus Logic CS4206A (AB 84) is a high-definition audio codec used in many computers, particularly in laptops or desktops, to manage audio input and output functions. The CS4206A is responsible for providing sound functionality, enabling your system to play audio, record sound, and interact with connected audio devices like headphones, microphones, speakers, and other peripherals.

The AB 84 designation is a version identifier for this specific part of the CS4206A model, which is still within the same product family but may have specific revisions or features.