CM6571 Datasheet, PDF (1/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

DESCRIPTION
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.
BLOCK DIAGRAM
CM6571
USB Audio Sound Chip
FEATURES
 USB 2.0 full speed-compliant
 USB audio device class 1.0-compliant
 USB human interface device (HID) class
1.1-compliant
 Built-in DSP for voice and audio process
 Voice process supports ENC, AEC and NR
 Audio process supports Xear™ Surround, Sonic
and parameter EQ
 Embedded 1T 8051
 Two-channel DAC for audio output interface
 Two-channel ADC for audio input interface
 Aux in for AEC signal reference
 Built-in 96k/88.2k/48k/44.1kHz and 16/
24-bit S/PDIF transmitter
 Supports I2S in/out interface and up to 96kHz/
24 bits
 Built-in AGC on recording path
 Supports digital microphone interface
 Supports synchronous/asynchronous audio data
synchronization
 Master I2C control interface for external audio
USB
PHY
USB
Control
Engine
I2C
EEPROM
IF
RAM(16K)
ROM(18K)
GPIO
SPI IF
UART IF
I2C
MCU
8051
AGC
DSP
5 band EQ
5 band EQ
ADC
DAC
-14 ~ 49dB,
-1dB/step
Initial 20dB
-14 ~ 49dB,
-1dB/step
Initial 20dB
-26 ~ 37dB,
-1dB/step
Initial 0dB
Aux In
DMIC
2 Channel I2S In
Microphone In
Line In
-30 ~ 12dB,
-1dB/step
Initial 0dB
-15 ~ 32dB,
-1dB/step
Initial 20dB
-62 ~ 0dB,
-1dB/step
Initial 0dB
Speaker/ Heaphone
2 Channel I2S Out
SPDIF Out
Revised: Nov. 2012
Page 1 / 63
www.cmedia.com.tw
Copyright© C-Media Electronics Inc.