The key WCD9335 functions include the following: 1.Serial low-power interchip media bus (SLIMbus) for access to all on-chip digital audio channels; inter-IC sound (I 2 S) accesses fewer paths, but maintains compatibility with earlier integrated circuits (ICs). 2.Six analog input ports and seven analog output ports 3.Six audio analog-to-digital converters (ADCs) and seven digital-to-analog converters (DACs) 4.Six digital microphone inputs (three clock/data pairs) 5.Active noise cancellation (ANC