C Media

USB2.0 Audio Processor

• Actual USB 2.0 Controller for PC and Consumer
• High Definition Audio Playback and Recording (192KHz / 32bit)
• Asynchronous synchronization transfer to reduce clock jitter
• Electrical Noise Immunity via USB Digital Link
• Flexible Interface to Extent Application Field
• I2S audio interface for external high quality codec
• Flexible Descriptor Option by Firmware
• Support PLL and feedback endpoints modes
• USB Spec. Rev.2.0 high-speed/full-speed mode compatible
• Latest USB Audio Device Class Definition Release v.2.0/1.0 compatible
• USB Human Interface Device (HID) Class Definition Release 1.1 compliant
• Supports USB suspend/resume/reset functions
• Supports control, interrupt, bulk, and isochronous data transfers
• Max. 3 Independent Playback Streams:
• -Default Sample Rates: 44.1K/48K/88.2K/96K/176.4K/192KHz (192K/176.4KHz are available only in USB Audio Class 2.0/High-speed mode)
• -Supported Bit Length: 16/24/32 bit
• -PDMA#A and C engines support 2-channel data to I2S/HDA output
• -PDMA#B supports S/PDIF output
• Max. 3 Independent Capture Streams:
• -Default Sample Rates: 44.1K/48K/96K/192KHz (192K/176.4KHz are available only in USB Audio Class 2.0/High-speed mode)
• -Supported Bit Length: 16/24/32 bit
• -RDMA#A and B support 2-channel data from I2S/HDA input
• -RDMA#C supports S/PDIF input (192KHz is supported only with Crystal and PLL clock source)
• Digital mixing/routing engine to mix input streams to output streams
• 2 pairs I2S or Left-Justified serial audio output interface
• 2 pairs I2S or Left-Justified serial audio input interface
• Built-in 192K/176.4K/96K/88.2K/48K/44.1KHz and 16/24-bit S/PDIF transmitter
• Integrated 192K/176.4K/96K/88.2K/48K/44.1K and 16/24-bit S/PDIF receiver
• Supports S/PDIF IN-to-OUT loop-back path for signal transforming between TOSLINK and RCA connections
• Integrated 8051 Micro-processor
• Embedded 8051 micro-processor to handle the comment/protocol transactions
• Connects to an external parallel Flash/EEPROM memory (Max. 64KB, 55ns access time is required) for firmware codes
• HID interrupts can be implemented via firmware codes
• Provides maximum HW configuration flexibility with firmware code upgrade
• VID/PID/Product String can be customized via firmware code programming
• Master I2C control interface for external audio devices or EEPROM access
• Slave I2C control interface and interrupt pin for external MCU/device communication
• 9 GPIO pins and 6 GPI pins
• External device power-down control and reset pins
• Embedded USB2.0 transceiver (up to 480MB bandwidth)
• Auto detection for high-speed/full-speed
• GPIO pin for USB Audio Class 2.0 and 1.0 application mode configuration
• Provides Self-power or Bus-power mode selection pin
• Only single 12MHz crystal input is required (embedded PLL function) or optional oscillator inputs for 49.152 or 24.576MHz (for x48KHz) and 45.158 or 22.5792MHz (for x44.1KHz)
• Single 3.3V power supply (embedded 3.3V to 2.5V regulator for digital core)
• 3.3V digital I/O pads with 5V tolerance
• Industrial standard LQFP-100 package (16x16mm)
• Supports USB Audio Class 2.0 and high-speed mode on Windows® XP, Windows® Vista, Windows® 7 and Windows® 8, Mac OS X 10.5.7 (or later) with Cmedia vendor drivers
• USB Audio class 1.0 with full-speed/high-speed modes compatible with Windows® XP, Windows® Vista, Windows® 7 and Windows® 8 UAA driver, Mac OS X and Linux embedded USB audio drivers
• For Windows, Cmedia drivers provide the following Key Features:

             -Playback feedback endpoints to control the data transmission accuracy and to maximize the audio quality
             -Xear™ Pro 
             -Supports ASIO2.2 driver