usb d類功放

z usb 2.0 full speed compatible and usb if certification
z usb audio device class specification v1.0 compatible
z usb bus powered 500ma, with no need for external power supply
z high performance 16-bit stereo, 44.1 / 48 khz sampling rate for audio playback
z high efficiency high performance 2w x 2-ch class d amplifier, differential output with
no pop-noise
z embedded power-on-reset block
z embedded 5v to 3.3v regulator for single 5v external power supply
z self power / bus power selectable (by eeprom)
z single 12mhz crystal input with embedded pll
z isochronous transfer using adaptive synchronization with internal pll

z usb hid digital volume control
remote wakeup with hid buttons
z playback with soft-mute function
z digital volume boost function