Introduction - XMOS XS1-L2 Hardware Manual

USB Audio 2.0 Reference Design, XS1-L2 Edition Hardware Manual (1.6)

2 Introduction

The USB Audio 2.0 Reference Design, XS1-L2 Edition (hereafter "the board") is a
hardware reference design for a multi-channel USB audio interface using the XMOS
XS1-L2 dual-core event-driven processor. It contains a single XS1-L2 device enabling
implementation of a complete USB 2.0 high-speed device compliant with release 2.0
of the USB Audio Class specification.
A block diagram of the design is shown below:
Word Clock
BNC Input
13MHz
Oscillator
USB
Series B
Receptacle
+5V IN
The XS1-L2 event-driven processor communicates with the USB host via a ULPI USB
transceiver at the 480Mb/s high-speed rate. The XS1-L2 controls the streaming of
audio data over the USB connection and direct I
streams and MIDI communications. Multiple additional functions (e.g. Mixers/DSP
etc.) can be implemented by modifications to the standard software.
Downloaded from Elcodis.com electronic components distributor
User
PLL MCLK
LEDs
SYNC OUT & I2C
USB
High Speed
ULPI
USB
480Mb/s
Transciever
USB3318
MIDI
MIDI
1.8V LDO
In/Out
+3V3D
3.3V DC-DC
L1 Core
1.0V DC-DC
Supply
Optical
CODEC
Digital
RC LP Filter
Analogue
Audio Rx
Supply
XSYS 4Mbit GPIO
Debug FLASH Header
GPIO JTAG SPI GPIO
I2C
MCLK
XMOS
I2S
XS1-L2-124QFN
I2C
MCLK
Resync
Coaxial Optical Coaxial
Digital Digital Digital
Audio Rx Audio Tx Audio Tx
2
S interface to the audio CODEC, digital
www.xmos.com
¼"
Pre-Amp Mono
TRS Jack
3.5mm
Pre-Amp Mono
TRS Jack
3.5mm
Passive
Stereo
LPF
TRS Jack
3.5mm
Passive
Stereo
LPF
TRS Jack
24 bit
192kHz
3.5mm
Audio
Passive
Stereo
CODEC LPF
TRS Jack
CS4244
Passive 3.5mm
LPF & Stereo
HP Amp TRS Jack
3.5mm
Passive
Stereo
LPF
TRS Jack
3.5mm
Passive
Stereo
LPF
TRS Jack
3.5mm
Passive
Stereo
LPF
TRS Jack
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