USB Multi-Function Audio Platform (Apple Host Mode)

USB MULTI-FUNCTION AUDIO PLATFORM (Apple Host Mode)
Stereo USB Audio Class 2 development platform for PC, Mac, iOS, Android
FEATURES
 USB audio hardware development
and software reference platform
o Stereo analog input and output
o MIDI input and output
 USB compliant device
o High-Speed USB device
Optional Full-Speed fall-back
o USB Audio Class 2.0 device
Optional Audio Class 1.0 fall-back
o Self-powered with Apple charging
 Bit perfect USB audio transfer
o Asynchronous Isochronous from host
o Adaptive Isochronous to host
o PCM ≤384kHz at 16, 24 or 32bits
o Native DSD64 and DSD128
o DoP64 and DoP128
o Local crystal low-jitter audio clocking
 Multiple OS support
o Windows
o Mac OS X
o Apple iOS (Apple Host Mode)
o Android
 Royalty free software stack
o Provided as source code
The USB Multi-Function Audio (MFA) Platform is a
complete development hardware and reference
software platform ideal for stereo, high-resolution
USB audio applications, such as Apple audio docks.
The MFA hardware is based around the XS1-U6
multicore microcontroller; an XMOS xCORE-USB™
device with an integrated High Speed USB 2.0
PHY and 6 logical cores delivering 500MIPS of
deterministic and responsive processing power.
Exploiting the flexible programmability of the
xCORE™ architecture, the MFA platform supports
multiple USB audio streaming formats (PCM, DSD
& DoP) at the high sampling rates (PCM up to
384kHz, DSD up to x128) and bit depths (PCM up
to 32bits) demanded by the audiophile market.
The guaranteed Hardware-Response™ times of
xCORE technology always ensure low latency
(round trip as low as 3ms), bit perfect audio
streaming to and from the USB host.
Delivered as source code, the reference software
provides a fully featured production ready
solution, including support for: Full- and HighSpeed USB operation, USB Audio Class 2.0 & 1.0,
MIDI, HID & DFU classes and Apple Host Mode
operation.
The XMOS xTIMEcomposer™ Studio development
suite and tools then allow for quick and easy
software development and customisation to add
customer specific, product differentiating features.
USB Multi-Function Audio Platform (Apple Host Mode) PRODUCT BRIEF
USB MULTI-FUNCTION AUDIO PLATFORM (Apple Host Mode) BLOCK DIAGRAM
xCORE-USB XS1-U6
XUD
XMOS as
USB Device
Power
supply
Buttons
LEDs
System
control
USB Audio
Class 2.0
I²S input
ADC
I²S / DSD
output
DAC
MIDI
in/output
MFi
Multi-Function Audio Platform
Feature
Benefit
High-speed USB 2.0 device
Apple Lightning and USB-B connector
Plug-and-play operation
Apple device charging
USB Audio Class 2.0 compliant
Driverless operation with Mac OS X4, iOS5 and Android6
Multiple driver vendors for Windows7
PCM up to 384kHz1 32bits2
DSD up to x128
DoP (DSD over PCM) up to x1283
High resolution stereo audio playback
Local clocking
Asynchronous USB audio transfer
Low jitter, high quality audio capture and playback
Powered by xCORE-USB multicore
microcontroller
Flexible, deterministic and responsive processing power
Low audio USB round trip latency (<3ms achievable)
Flexible hardware & software platform
Predefined feature set reference software
Easily customisable to meet specific product requirements
Source code reference software
Integrated development tools suite
Rapid development and code reuse
Royalty-free deployment
Fast time to market
1, 2, 3: The MFA reference software supports PCM audio up to 384kHz at 16, 24 or 32bits. The MFA hardware (DAC) supports 24bit PCM audio at
up to 192kHz. Support for 384kHz PCM, 32bit PCM and DoP128 is therefore disabled in the reference software by default.
4: Mac OS X v10.6.4 and later provides native USB Audio Class 2.0 support.
5: Apple iOS support only available to Apple MFi licensees.
6: Requires that Android device is USB host with USB Audio Class support. Tested against: Samsung Galaxy S3, S4, Note, Sony Xperia Z1, HTC One.
7: USB Audio Class 2.0 support under Windows requires a 3rd party driver.
ORDERING INFORMATION
Available to order from mfi.avnet.com.
Part number
Contents
XK-USB-AUDIO-U8-2C-BLC
MFA core board: XP-USB-AUDIO-U8-2C
USB B / Lightning slice: XA-SK-USB-BLC
xTAG debugger: XA-XTAG2
12V PSU, USB cable
© 2014 XMOS LTD
Third party trademarks are hereby acknowledged.
This is a preliminary product brief, contents are subject to change.
XM-005256-PB | 2015-01-21