USB Compliance - USB spec. 2.0 full-speed compatible and USB-IF certification - USB audio device class spec. 1.0 compliant - USB HID device class spec. 1.1 compliant Architecture - USB suspend/resume support - Embedded USB transceiver and power-on reset circuit - Single 12MHz Crystal Input with On-chip PLL - Serial 24C02 EEPROM programming interface supported for customizing VID/PID/Product String/ Manufacture String/Serial Number/Volume Range/Initial Volume/HID_Disable/EQ/AGC and other configuration - Integrates 5-Band Hardware Equalizer with up-to-4 preset modes (00_Default/Music, 11_Movies , 01_Gaming, 10_Communication,) selectable by 2 HW control pins and the gain value of each band could be customized by EEPROM parameters - Built-in Automatic Gain Control (AGC) for microphone recording (Enabled by EEPROM) - MCU / EEPROM / GPIO control via HID / Vender command interface (MCU read/write support 16 bytes data transfer bandwidth) - Supports up to 7 GPIO pins (Configured by EEPROM) - USB Bus-Power mode with High-power (500mA) and Low-power (100mA, default) mode options by external selection pin - Single 5V power supply with embedded 5V-to-4.5V and 5V-to-3.3V regulators Audio I/O - 2-channel DAC outputs with 16-ohms headphone amplifier (supports 16-bit resolution and 48KHz, 44.1KHz, 32KHz, 22.05KHz, 16KHz, 11.025KHz, 8KHz sampling rates; note only 48K & 44.1KHz are available when EQ function is enabled.) - 2-channel ADC inputs (supports 16-bit resolution and 48KHz, 44.1KHz, 32KHz, 22.05KHz, 16KHz, 11.025KHz, and 8KHz sampling rates; note only 48K & 44.1KHz are available when EQ function is enabled.) - Supports stereo mic inputs with independent voltage bias pins and analog mixer (monitoring) function - Supports ADC DC offset cancellation high-pass-filter - Supports optional digital S/PDIF output (up to 48KHz/16bit) compatible with AES/EBU IEC-60958 spec. (default on, but not reported in USB audio descriptor) - Configurable USB audio topology to Headset/Speaker/Microphone modes by EEPROM Control Interfaces - Featured with Microsoft® HID controls including Vol_Up / Vol_Dn / Playback_Mute / Record_Mute / Play_Pause / Stop / Previous / Next hot-key buttons (enabled by default) - Optional analog DC VR volume control pin with internal ADC potentiometer - I2C master/slave mode control interface - Supports 4 LED indicator control pins: Operation status/ Playback_Mute /Recording_Mute (Enabled by default) / Mic Clipping-Detection (enabled by EEPROM)
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