The CM6533X1 is a USB 2.0 audio chip built-in 8051 for flexible applications. With integrated Tri-Colors PWM LED driver and two-channel ADC/DAC and S/PDIF interface that makes it suitable for headset, docking, speaker and microphone applications. The internal 8051 can also be developed to a lot of different applications, such as Microsoft™ Lync/Skype/VoIP device, Android Phone or Tablet/Slate docking device. The CM6533X1 is compatible with USB Audio Class 1.0 and USB 2.0 Full-Speed, thus it can plug & play without any additional software installation on major operating systems. The internal DAC and ADC support from 8 ~ 96 KHz sampling rate and 16/24 bits resolution.The CM6533X1 integrates equalizer on both playback and recording paths to compensate the frequency response of microphone and headphone.The CM6533X1 also integrates 256K Byte flash (Including 32KB F/W programming size) and crystal but requires few passive components to make a finish product. Thus, it can save the total BOM cost and PCB area can be smaller.Product benefits:• Supports Xear™ driver• Two - channel DAC for audio output interface• Two - channel ADC for audio input interface• Embedded 1T 8051 with 32K Byte SRAM• Embedded 256K Byte flash(Including 32KB F/W programming size)• Embedded oscillator without external crystal• Supports Digital Microphone interface• Built-in S/PDIF transmitter• Built-in 5-Band Hardware Equalizer on both playback and recording paths• Built-in AGC (Auto Gain Control) on recording path• Supports dual tone generator• Supports USB suspend/resume/reset functions• Supports control, interrupt, bulk, and isochronous data transfers• Supports OMTP and CTIA auto switch on a 4-pole jack• Integrated Tri-Colors PWM LED driver• Master/Slave H/W I2C/SPI/UART control interface for external audio devices or FLASH access• Built-in 30mW @ R=32? headphone amplifier• On chip watchdog timer• Windows® 7/ Windows® 8/ Windows® 8.1 Logo Program compatible Jotrin Electronics (and its e-commerce division: zxg-ti.cn) is an authorized Cmedia distributor.