XMOS XR-USB-AUDIO-2.0 USB Audio Class 2.0 参考设计

USB Audio 2.0 Reference Design

USB Audio Class 2.0 provides a dramatic improvement over USB Audio Class 1.0 with the addition of 24bit audio, sample frequencies up to 192kHz and the ability to scale to large numbers of input/output channels. XMOS has developed a USB Audio Class 2.0 software framework design to work on XS1-L devices. The design provides certified USB 2.0 High Speed device and Audio Class 2.0 device class implementations with configurable digital audio interfaces, peripherals and the ability to integrate audio processing. The framework also includes support for USB Audio Class 1.0.

500 MIPS, 8 threads, XS1-L1 processor
Streams bit-perfect audio data up to 24-bit @ 192kHz
Supports standard sample rates: 44.1kHz, 48kHz, 88.2kHz, 96kHz and 192kHz
USB endpoints use the asynchronous synchronization mode to allow an external low jitter audio master clock to be used
Optical digital audio output (S/PDIF)
Stereo line-level audio input and output
XMOS XSYS debug header for easy programming/debug from the host using the XMOS XTAG2 debug adapter
USB bus-powered