XMOS Audio Interface User manual

XMOS Audio Interface - Quick Start Guide
Version 1v0
Publication Date: 2009/12/17
Copyright © 2009 XMOS Ltd. All Rights Reserved.

XMOS Audio Interface - Quick Start Guide (1v0) 2/8
1 XMOS Audio Interface
The XMOS Audio Interface provides a complete multi-channel digital audio interface
for XMOS Development Kits including the XS1-G Development Kit (XDK). The board
provides six analog channels in and eight analog channels out with additional stereo
S/PDIF, MIDI, instrument, microphone and headphone sockets.
The analog channels are provided by an I2S CODEC. MIDI and S/PDIF are controlled
directly from an attached XMOS device.
The XAI Kit includes:
XAI Audio Interface Board
64-way IDC Connector
MIDI Expansion Cable
Requirements : You require an XMOS development kit to use the XAI. Example
software is available from XMOS providing a full reference design for your audio
solutions.
www.xmos.com

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2 Getting Started
Download and install the demonstration software from the XMOS website, according
to your license agreement.
To use a USB or AVB input, remove the back of
the XDK and set DIP switches as required—see
Figure 3.
Replace the back cover.
Connect your USB or AVB input device to the
XDK. If you are using a USB device connect it to
the USB port on the right-hand side of the XDK.
If you are using an AVB device connect it to the
Ethernet RJ45 socket to the right—see Figure 2
Connect the XAI to the XDK using the 64-way
IDC cable supplied.
Connect additional audio input and output de-
vices to the XAI—see Figure 1for details of
input and output connectors.
Plug-in the XDK using the 12V power supplies
provided with the Kit.
Switch on the XDK and wait for the LEDs to
flash to indicate that the devices is initialised.
The kit is now ready for use.
www.xmos.com

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3 XAI Connectors
MIC IN
AUDIO IN
AUDIO OUT
LINE OUT
XAI
HEADPHONE
MIDI
IN/OUT
INSTRUMENT
IN
XDK
64-way
IDC
S/PDIF
OUT
COAX
OUT
S/PDIF
IN
Select Input
Switch
COAX
IN
Figure 1: XAI Connectors
If you are using the Coax or S/PDIF input connector, you must use the Select Input ~
Switch to select the input device—left for Coax and right for S/PDIF. The Coax and
S/PDIF output connectors are permanently enabled.
www.xmos.com

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4 XDK Connectors
USB (User)
RJ45 XSYS CONNECTORS (RESERVED)
RJ45 ETHERNET
12V PSU
USB (Host/Debug)
ON/OFF SWITCH
XAI
64-way
IDC
Figure 2: XDK Connectors
www.xmos.com

XMOS Audio Interface - Quick Start Guide (1v0) 6/8
5 XDK DIP Switches
To use an USB or AVB input to the XDK, the DIP switches on the back of the XDK
motherboard must be set as follows:
USB AVB
Off On Off On
Bank 0 Bank 0
✓ ✓
✓ ✓
✓ ✓
✓ ✓
Bank 1 Bank 1
✓ ✓
✓ ✓
✓ ✓
✓ ✓
Bank 2 Bank 2
✓ ✓
✓ ✓
✓ ✓
✓ ✓
Bank 3 Bank 3
✓ ✓
✓ ✓
✓ ✓
✓ ✓
Bank 4 Bank 4
✓ ✓
✓ ✓
✓ ✓
✓ ✓
Bank 5 Bank 5
✓ ✓
✓ ✓
✓ ✓
✓ ✓
Figure 3: XDK DIP Switches
www.xmos.com

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6 Port map
The table below provides a full description of the port-to-pin mappings used on the
XAI board:
Pin Port Processor
1b 4b 8b 16b 2
XnD0 P1A0 SCLK (Serial Clock or Bit Clock)
XnD1 P1B0 LRCK (Left/Right Clock or Word Clock)
XnD2 P4A0 P8A0 P16A0 SDA (I2C)
XnD3 P4A1 P8A1 P16A1
XnD4 P4B0 P8A2 P16A2 SCL (I2C)
XnD5 P4B1 P8A3 P16A3
XnD6 P4B2 P8A4 P16A4
XnD7 P4B3 P8A5 P16A5
XnD8 P4A2 P8A6 P16A6
XnD9 P4A3 P8A7 P16A7
XnD10 P1C0 DAC_SD1
XnD11 P1D0 DAC_SD2
XnD12 P1E0 DAC_SD3
XnD13 P1F0 DAC_SD4
XnD14 P4C0 P8B0 P16A8 RST_N (Reset to CODEC)
XnD15 P4C1 P8B1 P16A9 Low Cost DAC Frequency Select
XnD16 P4D0 P8B2 P16A10 INT (Interrupt from CODEC)
XnD17 P4D1 P8B3 P16A11
XnD18 P4D2 P8B4 P16A12
XnD19 P4D3 P8B5 P16A13
XnD20 P4C2 P8B6 P16A14
XnD21 P4C3 P8B7 P16A15
XnD22 P1G0 ADC_SD1
XnD23 P1H0 ADC_SD2
XnD24 P1I0 ADC_SD3
XnD25 P1J0 Low Cost DAC LRCK
XnD26 P4E0 P8C0 P16B0 MIDI OUT
XnD27 P4E1 P8C1 P16B1
XnD28 P4F0 P8C2 P16B2 MIDI IN
XnD29 P4F1 P8C3 P16B3
XnD30 P4F2 P8C4 P16B4
XnD31 P4F3 P8C5 P16B5
XnD32 P4E2 P8C6 P16B6
XnD33 P4E3 P8C7 P16B7
XnD34 P1K0 SPDIF_TX
XnD35 P1L0 SPDIF_RX
XnD36 P1M0 P8D0 P16B8 CLK_OUT (From Clock Synchronisation Chip)
XnD37 P1N0 P8D1 P16B9 CLK_IN (To Clock Synchronisation Chip)
XnD38 P1O0 P8D2 P16B10 Low Cost DAC DATA
XnD39 P1P0 P8D3 P16B11 Low Cost DAC SCLK
XnD40 P8D4 P16B12
XnD41 P8D5 P16B13
XnD42 P8D6 P16B14
XnD43 P8D7 P16B15
www.xmos.com

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7 Further Information
Further information on the XAI (including the hardware manual, schematics and
board design files) is available at: www.xmos.com/xai.
8 Document History
Date Release Comment
2009-12-17 1v0 First release
Disclaimer
XMOS Ltd. is the owner or licensee of this design, code, or Information (collectively,
the “Information”) and is providing it to you “AS IS” with no warranty of any kind,
express or implied and shall have no liability in relation to its use. XMOS Ltd. makes
no representation that the Information, or any particular implementation thereof, is
or will be free from any claims of infringement and again, shall have no liability in
relation to any such claims.
Copyright © 2009 XMOS Ltd. All Rights Reserved. XMOS and the XMOS logo are
registered trademarks of XMOS Ltd in the United Kingdom and other countries,
and may not be used without written permission. Company and product names
mentioned in this document are the trademarks or registered trademarks of their
respective owners. Where those designations appear in this document, and XMOS
was aware of a trademark claim, the designations have been printed with initial
capital letters or in all capitals.
www.xmos.com