DESCRIPTIONS AND OVERVIEW
CM103+ is a highly integrated single chip for USB digital control speaker application. It is a truly plug-and-play USB audio device and provided high quality digital sound playback. This one chip solution not only embedded USB transceiver, ADC, DAC component but also integrated digital control power amplifier function for USB digital sound application. Minimum external components are needed for building a high-end 2CH USB speaker system, which makes CM103+ a simple and very cost-effective solution. Since no driver is necessary for audio playback on all major OS.

FEATURES
● USB 2.0 Full Speed Compatible and USB IF certification
● USB Audio Devices Class Specification Ver1.0 Compatible
● USB Bus Powered 500mA, without External Power Supply
● High performance 16-Bit Stereo, 48 / 44.1 KHz Sampling Rate for Audio Playback
● S/PDIF Output Interface
● Embedded USB Transceiver
● Embedded High Performance 16-Bit Audio DAC
● Embedded Digital Control Power Amplifier for Speaker Driving
● Support Power Amplifier Enable / Disable Control Pin
● Support Dynamic Range Control (DRC) Feature to Provide a Better Listen Experience
● Embedded Power-On-Reset Block
● Embedded 5V to 3.3V Regulator with Voltage Level Detector for Single 5V External Power Supply
● Embedded Temperature Protection Circuit
● Embedded X2 Modulation for Higher Audio Quality
● Embedded Anti-Pop Circuit with Internal Feedback Structure
● Single 12MHz Crystal Input with Embedded PLL
● Isochronous Transfer using Adaptive Synchronization with Internal PLL
● External EEPROM Interface for Vendor Specific VID / PID / Product String
● EEPROM Read / Write Function via Vendor Specific Request for Mass Production Convenience
● Analog Volume Control Input with Simple External VR Circuit
● Digital Volume Control Input with Digital Rotary Encoder or Vol_up / Vol_dn / Play_mute Bottoms
● Vol_up / Vol_dn / Play_mute Pins and Digital Rotary Encoder Interface Support USB HID Devices Class Ver1.11 for Host Volume Control Synchronization
● Supports USB Suspend / Resume Mode and Remote Wakeup with Digital Volume Control Pins
● LED Indicator Pin During Playback
● 1 GPIO pin for Application Specific Usage
● 3.3V I/O with 5V Tolerance
● Dolby® Digital and DTS Audio Streaming via S/PDIF Output
● Compatible with Win 98SE / Win ME / Win 2000 / Win XP, and Mac OS 10.X without additional driver