1
Summary
●
X-SPDIF 2 USB Audio Class 2.0 is a new designed asynchronous data
transmission digital interface, which inherited the high quality of last
generation to make it connect to the other devices through IIS directly. It
crossed the quality lost of digital signal caused by protocol conversion, while
integrated the high-quality femtosecond clock and FPGA processing unit, to
realize a maximum of 32bit/768
k
Hz for PCM signal and 1bit/DSD512 for
signal output.
●
The XMOS 8-core new generation X-CORE XU208 digital signal processing
unit is the most advanced solution to USB Audio Class 2.0 digital audio with
strong processing capacity for multi-core and multi-threading.
●
The powerful XILINX SPARTAN FPGA assisting with XMOS to premium manage
the clock and process IIS data, achieved the DoP code conversion and remove
the jitter in IIS port.
●
Two pieces ACCUSILICON high-quality femtosecond clock as basic clock
source, and respectively work for 44.1k
Hz
and 48k
Hz
as well as several times
sampling rate, which is controlled by FPGA to do the frequency division and
switch automatically. Besides, femtosecond has an independent ultra-low
noise LDO power supply circuit.
