USB 음성 카드

Fully supports USB2.0
Compliant with the USB audio device class specification version 1.0;

Supports USB suspend / resume mode and remote wake-up volume control pin functions;

Single 12MHz crystal input single-chip PLL and embedded USB transceiver;

Speaker mode (only playback) or headset mode (Playback recording) have a jumper pin (jumper pin);

Headset mode, USB audio function topology (USB Audio Function Topology) has two input terminals and two output terminals, a mixer unit, a feature selection unit and three functional units.

Headset mode, the jumper pin (jumper pin) on / off the mixer unit;

Speaker mode, USB audio function topology has 1 input terminal, an output terminal and a characteristic functional unit;

Support a control terminal, a synchronization output terminal, a synchronous interrupt input terminal and a terminal.

When the device is paused, the bandwidth of the release of playback (Releasing Playback Bandwidth) and the bandwidth of the USB bus alternately set to zero;

Increased, reducing the volume and mute playback pins to support USB HID device group, so the host can synchronize control.

Mute Pin with LED indication indicating mute status

EEPROM for vendor specific USB VID, PID and serial number;

EEPROM memory requirements of a supplier of special features to facilitate large-scale production;

Should be customized for VID, PID and serial number (Product String);

Through the HID interface 8 GPIO pins to read and write;

Registers control the embedded buzzer function;

You can set the voltage output of the jumper pin (Jumper Pin) (3.5V or 2.5V);

Used to set the power mode jumper pin (Jumper Pin);

Asynchronous transfer mode adaptive synchronization with internal PLL;

Playback and recording sample rates are 48K / 44.1kHz;

Soft mute function;

Embedded high-performance 16-bit audio DAC for headphone receiver buffer;

Host data loss noise reduction function;

Microphone gain control input 16-bit embedded ADC;

Embedded power-on reset (Power-On-Reset) module;

Embedded 5V-3.3V voltage regulator supports a single external 5V operation;

Free driver compatible with Win98 SE / Win ME / Win 2000 / Win XP / Mac OS9 / OS X