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CM103+: 16-Bit Stereo USB Audio Controller

Overview
CM103+ is a highly integrated single chip for USD digital control speaker. It is support USB standard HID interface which provide Vol_up / Vol_dn / Playback_mute buttons and CE like Rotary Encoder feature for pure digital volume control. Moreover, the innovation technology DRC (Dynamic Range Control) feature was integrated on CM103+. This Dynamic Range Control function can support high efficiency volume output to get loudness sound effect similar D class amplifier capability. Vender can just using single chip to saving external amplifier component and getting a better listen experience when listen to a music source with wide dynamic range.

CM103+ also supported EEPROM interface for vendor define specific VID/PID/Product String and even specific hardware configuration. More flexible and customized design is possible with GPIO pin, which is accessible by USB vendor specific request. No driver is necessary for audio playback on all major OS; user can just plug and play for multi-media sound entertainment. C-Media also supports a unique patent driver ¡§Xear3D sound¡¨ which can support global reverberation, equalizer, 3D sound effects and virtual 7.1ch speaker shifter function.

Features:

l USB 2.0 Full Speed Compatible and USB IF certification
l USB Audio Devices Class Specification Ver1.0 Compatible
l USB Bus Powered 500mA, without External Power Supply
l High performance 16-Bit Stereo, 48 / 44.1 KHz Sampling Rate for Audio Playback
l S/PDIF Output Interface 
l Embedded USB Transceiver and High Performance 16-Bit Audio DAC
l Embedded Digital Control Power Amplifier for Speaker Driving and X2 Modulation for Higher Audio Quality
l Embedded Anti-Pop Circuit with Internal Feedback Structure
l External EEPROM Interface for Vendor Specific VID / PID / Product String

l

 Embedded 5V to 3.3V Regulator with Voltage Level Detector for Single 5V External Power Supply
l Support Power Amplifier Enable / Disable Control Pin
l Support Dynamic Range Control (DRC) Feature to Provide a Better Listen Experience
l Analog Volume Control Input with Simple External VR Circuit
l LED Indicator Pin During Playback
l 1 GPIO pin for Application Specific Usage
l Vol_up / Vol_dn / Play_mute Pins and Digital Rotary Encoder Interface Support USB HID Devices Class Ver1.11 for Host Volume Control Synchronization
l Dolby® Digital Audio Streaming via S/PDIF Output
l Compatible with Win 98SE / Win ME / Win 2000 / Win XP, and Mac OS 9 / OS X without additional driver
   
Applications
l USB Speakaer 
l USB Headphone
l USB Adapter