Usb Multi-Function Audio (Mfa) Kit - XMOS xCORE-200 Multi-channel Audio board Design Manual

USB Audio Design Guide

2.3 USB Multi-function Audio (MFA) Kit

It is not recommended to use this hardware as a basic for a new design
The XMOS Multi-function Audio kit
ence design available from XMOS based on a single tile XMOS U-series device.
The separate USB slice board allows flexibility in the connection method to the USB
audio source/sink as well as other functionality such as 3rd party authentication
ICs and any required USB switching. This also means the XMOS device can be used
as a USB device or host using the same main board.
This document addresses the combination of the main board with the USB AB slice
(part numbers XK-USB-AUDIO-U8-2C and XA-SK-USB-AB respectively). This provides
a standard USB Audio device hardware configuration using the B socket on the USB
AB slice.
Figure 4:
Multi-
function
Audio Kit
Block
Diagram
The core board includes a U-Series device with integrated USB PHY, a stereo DAC
(with support for Direct Stream Digital) and a stereo ADC. Both ADC and DAC
12
http://www.xmos.com/products/reference-designs/mfa
XM0088546.1
A main board which includes the XMOS U-series device and all audio
hardware
A "USB Slice" board which contains USB connectivity
3V3 Analogue Audio
3V3 ADC
Dual
3V3 High
3V3 LDO
3V3 IO
Side Switch
5V
5V Analogue Audio
Charge Pump
USB
High Speed
Slice
Connector
VBUS
Preferential Preferential PCIE 36
Socket
5V OR 5V OR
IN
GPIO
EN
Over Voltage
Protection
Over Current
Protection
Switch
12V to 5V
DCDC
12V DC
3A
Cent +ve
Connector
12
(XK-USB-AUDIO-U8-2C-AB) is a hardware refer-
5 Pin DIN
MIDI TX
MIDI
4Mbit
Flash
Buffer
CS
MUX
VBUS IN
SPI
USB
EN
I2C X
MOS
XS1-U8A-64
JTAG
XSCOPE
Link
2 Position
XSYS Switch
2 x User
Debug &
LEDs
Connector 2 x Push
Buttons
5 Pin DIN
MIDI RX
Gate SPDIF
Isolator &
Buffer
24 bit 192kHz
MIDI
+ DSD
Stereo Audio Differential to
DAC Single Ended
Active LPF
I2S
CS4392
I2S 24 bit 192kHz
Stereo Audio
ADC Single Ended
Active LPF
CS4392
24MHz
MCLK
FSEL
Audio Master
Clock PLL
24.576 MHz
Or
22.5792 MHz
& 24MHz
14/110
RCA
Socket
Stereo
3.5mm
Stereo
TRS Jack
Stereo 3.5mm
Stereo
TRS Jack