USB Audio 2.0 Reference Design, XS1-L1 Edition Hardware Manual (1.0)
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USB endpoints use the asynchronous synchronisation 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
•
Two push-button switches and two LEDs for programmable use
The diagram below shows the layout of the main components on the board:
H
B
M
N
B
J
L
I
I
K
C
F
E
E
D
H
G
A
A
XS1-L1 Device
H
Push-Button Switch
B
USB Connector/Transceiver
I
Green User LED
C
Audio CODEC
J
USB Power LED
D
Optical digital output
K
Audio Clocking
E
3.5mm Stereo Jack
L
1V0 Core Supply
F
SPI FLASH
M
4V3 Analogue Supply
G
XSYS Debug Interface
N
13MHz Oscillator
The rest of this document provides a detailed description of each of the main circuit
components.
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