CM6571 Datasheet, PDF (5/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
1 Description and overview
The CM6571 is a USB 2.0 audio chip with a built-in 8051 and DSP designed for a wide range of applications. With an
internal two-channel ADC/DAC, S/PDIF, it is perfectly suited for gaming headset, speakerphone, surround speaker or
Apple docking applications.
The CM6571 is a USB audio class 1.0-compatible, boasting plug and play functionality without installing additional
software on popular operating systems. The internal DAC/ADC and S/PDIF out interface supports
96k/88.2k/48k/44.1kHz sampling rates and 16/24-bit resolutions.
Furthermore, the DSP inside CM6571 supports voice and audio process. Voice process includes Environment Noise
Cancellation, Acoustic Echo Cancellation and Noise Reduction, functions that produce better communication
experience. Audio process includes Xear™ surround headphone, sound expander, dynamic bass, audio brilliant, smart
volume and parameter Equalizer, processes that enrich music playback, movie and gaming battle sound vividness.
2 Ordering information
Product
Package Marking
CM6571
CM6571
Package Type
VQFN-88 (10 x 10mm)
Green Package
Transport
Media
Tray
Storage
Temperature
-45 to 120℃
3 Features
3.1 USB compliance
 USB specification 2.0 full speed-compatible
 Three USB upstream ports for connecting to a PC and mobile device simultaneously
 USB audio device class 1.0-compliant
 USB human interface device (HID) class 1.1-compliant
 Supports USB suspend/resume/reset functions
 Supports control/interrupt/bulk/isochronous data transfers
3.2 DSP algorithm
 Voice process
 Xear™ Volear Environment Noise Cancellation (ENC) technology for dual omni-microphones
 Adjustable 20-40dB cancellation of environmental dynamic and stationary noises and other parameters
 Supports mic auto-calibration mechanism, allowing dual-mic sensitivity and mismatching in production
 Allows wide placement distance range between two microphones (8-14 cm recommended)
 Supports mic-in auto-gain control (AGC) for ADC recording quality when the ENC function is on
 Optional acoustic echo cancellation (AEC) processing mode for speakerphones
 Optional mono-mic noise reduction (NR) processing mode for camcorder/voice recorders
 16-bit/16kHz high-fidelity voice processing
 Audio process
 Xear™ surround headphone
Revised: Nov. 2012
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