Analog Devices EVAL-ADAU1466Z User manual

EVAL-ADAU1466Z User Guide
UG-1135
One Technology Way •P. O . Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: [phone] •Fax: [phone] •www.analog.com
Evaluating the ADAU1466 SigmaDSP Audio Processor
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.Rev. 0 | Page 1 of 45
FEATURES
4 analog inputs
8 analog outputs
Stereo S/PDIF input and output
Self boot EEPROM memory
EVALUATION KIT CONTENTS
EVAL-ADAU1466Z evaluation board
EVAL-ADUSB2EBZ (USBi) communications adapter
USB cable with Mini-B plug
6 V ac to dc power supply
HARDWARE REQUIRED
PC running Windows XP, Windows Vista, or Windows 7
Analog, stereo audio source with an output cable terminated
with a 3.5 mm (1/8 inch) plug (for analog input)
Headphones, desktop speakers, or audio input with a cable
terminated with a 3.5 mm (1/8 inch) plug (for analog
output)
S/PDIF audio source and receiver, each with optical cables
terminated with TOSLINK connectors (for digital
input/output)
SOFTWARE REQUIRED
SigmaStudio software, available for download from the
SigmaStudio product page
DOCUMENTS NEEDED
ADAU1466 data sheet
AD1938 data sheet
AN-1006 Application Note
GENERAL DESCRIPTION
This user guide details the design, setup, and operation of the
EVAL -ADAU1466Z evaluation board. This device is suitable for
evaluation of, and software development for, the ADAU1466
and ADAU1462 SigmaDSP processors. Note that the ADAU1466
and the ADAU1462 are functionally identical, except that the
ADAU1466 has more program and data memory than the
ADAU1462. When using this evaluation board to evaluate the
ADAU1462, in the Setting Up Communications in SigmaStudio
section, select the ADAU1462 block rather than the ADAU1466
as shown in Figure 15. Performing this action informs the compiler
to limit the amount of memory allocated to match the ADAU1462.
All other procedures and instructions in this user guide are
identical for the ADAU1462 and ADAU1466.
This evaluation board provides access to the digital serial audio
ports of the ADAU1466, as well as some of its general-purpose
input/outputs (GPIOs). An analog input and output is provided
by the AD1938 codec that is included in the evaluation kit. The
ADAU1466 core is programmed using Analog Devices, Inc.,
SigmaStudio® software, which interfaces to the evaluation board
via a USB interface (USBi). The on-board EEPROM can be
programmed for self boot mode. The evaluation board is powered
by a 6 V dc supply, which is regulated to the voltages required
on the board. The printed circuit board (PCB) is a 4-layer design,
with a ground plane and a power plane on the inner layers. The
evaluation board includes connectors for external analog inputs
and outputs, and optical Sony/Philips Digital Interface (S/PDIF)
interfaces. The master clock is provided by the integrated oscillator
circuit and the on-board 12.288 MHz passive crystal.
For full details, see the ADAU1466 and AD1938 data sheets,
which must be used in conjunction with this user guide when
using the evaluation board.

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TABLE OF CONTENTS
Features .............................................................................................. 1
Evaluation Kit Contents................................................................... 1
Hardware Required .......................................................................... 1
Software Required ............................................................................ 1
Documents Needed.......................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
EVAL -ADAU1466Z Evaluation Board Photograph .................... 3
Setting Up the Evaluation Board .................................................... 4
Installing the SigmaStudio Software.......................................... 4
Installing the USBi (EVA L -ADUSB2EBZ) Drivers.................. 4
Disabling the Self Boot Switch.................................................... 5
Powering Up the Evaluation Board............................................ 6
Connecting the Audio Cables..................................................... 6
Setting Up Communications in SigmaStudio........................... 8
Creating a Basic Signal Flow....................................................... 9
Downloading the Program to the DSP.................................... 10
Adding S/PDIF Input and Output to the Project................... 11
Controlling Volume with a Potentiometer ............................. 15
Using the Evaluation Board .......................................................... 18
Power Supply............................................................................... 18
Inputs and Outputs .................................................................... 18
Multipurpose (MP) Pins ........................................................... 20
Auxiliary ADC Pins ................................................................... 21
Communications Header.......................................................... 21
Self Boot........................................................................................... 22
Reset ............................................................................................. 24
Status LEDs ................................................................................. 24
Hardware Description.................................................................... 25
ICs................................................................................................. 25
Status LEDs ................................................................................. 25
Switch and Push-Button............................................................ 26
Evaluation Board Schematics and Layout Artwork................... 27
Ordering Information.................................................................... 43
Bill of Materials........................................................................... 43
REVISION HISTORY
8/2017—Revision 0: Initial Version

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EVAL-ADAU1466Z EVALUATION BOARD PHOTOGRAPH
15789-001
Figure 1.

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SETTING UP THE EVALUATION BOARD
Using the EVAL-ADAU1466Z evaluation board requires a PC
running Windows® XP or later with a USB interface and an
internet connection. The PC communicates with the evaluation
board using the included USBi interface. The software tool chain
used with the ADAU1466 is SigmaStudio, a fully GUI-based
programming environment. No DSP programming is required.
A full version of SigmaStudio, which includes a library of DSP
building blocks and the required USBi drivers, is available for
download from the SigmaStudio software page on the Analog
Devices website at www.analog.com/SigmaStudio.
INSTALLING THE SigmaStudio SOFTWARE
To download the latest version of SigmaStudio, take the
following steps:
1. Go to the SigmaStudio software page on the Analog Devices
website and select the latest version of the SigmaStudio
software from the Downloads and Related Software
section.
2. Determine whether the software must be installed on a
32-bit or 64-bit version of Windows, and locate the latest
release version of SigmaStudio as appropriate.
3. Download the installer for and execute the executable.
Follow the prompts, and accept the license agreement to
install the software.
INSTALLING THE USBi (EVAL-ADUSB2EBZ)
DRIVERS
SigmaStudio must be installed to use the USB interface (USBi).
After the SigmaStudio installation is complete, take the
following steps:
1. Connect the USBi to an available USB 2.0 port using the
USB cable included in the evaluation board kit. (The USBi
does not function properly with a USB 3.0 port.)
2. Install the driver software (see the Using Windows XP
section or the Using Windows 7 or Windows Vista section
for more information).
Using Windows XP
After connecting the USBi to the USB 2.0 port, Windows
recognizes the device (see Figure 2) and prompts you to install
the drivers. To install these drivers, take the following steps:
15789-004
Figure 2. Found New Hardware Notification
1. From the Found New Hardware Wizard window, select
the Install from a list or specific location (Advanced)
option and click Next > (see Figure 3).
15789-005
Figure 3. Found New Hardware Wizard—Installation
2. Click Search for the best driver in these locations, select
Include this location in the search, and click Browse to
find the USB drivers subdirectory within the SigmaStudio
directory (see Figure 4).
15789-006
Figure 4. Found New Hardware Wizard—Search and Installation Options

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3. When the warning about Windows logo testing appears,
click Continue Anyway (see Figure 5).
15789-007
Figure 5. Hardware Installation—Windows Logo Testing Warning
The USBi drivers are now installed. Leave the USBi connected to
the PC.
Using Windows 7 or Windows Vista
After connecting the USBi to the USB 2.0 port, Windows 7 or
Windows Vista recognizes the device and installs the drivers
automatically (see Figure 6). After the installation is complete,
leave the USBi connected to the PC.
15789-008
Figure 6. USBi Driver Installed Correctly
Confirming Proper Installation of the USBi Drivers
To confirm that the USBi drivers have been installed properly,
take the following steps:
1. With the USBi still connected to the USB 2.0 port of the
computer, check that both the yellow I2C LED and the red
power indicator LED are illuminated (see Figure 7).
2. In the Windows Device Manager, under the Universal
Serial Bus controllers section,(see Figure 8), check that
Analog Devices USBi (programmed) is displayed.
15789-009
Figure 7. State of USBi Status LEDs After Driver Installation
15789-010
Figure 8. Confirming Driver Installation Using the Device Manager
DISABLING THE SELF BOOT SWITCH
When setting up the EVAL-ADAU1466Z evaluation board, ensure
that the first switch of the four-position DIP switches, S3, is in the
off position, which is away from the printed label on the evaluation
board.
The default position of this switch is the off (disabled) position,
which prevents the ADAU1466 from executing a self boot oper-
ation at power-up. When the switch is in the on position, the LED
D7 is illuminated, and a self boot operation is executed, causing
the ADAU1466 to attempt to load code from an EEPROM when
it powers up or comes out of reset.

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POWERING UP THE EVALUATION BOARD
To power up the evaluation board, take the following steps:
1. Connect the included power supply to the wall outlet
(100 V to 240 V, ac 50 Hz to 60 Hz).
2. Connect the female plug of the power supply to the J4 male
connector on the EVAL-ADAU1466Z, as shown in
Figure 9.
15789-011
Figure 9. Connecting the Power Supply
3. After the power supply is connected, the D2 status LED
(A_3V3) illuminates.
4. Connect the ribbon cable of the USBi to the control port of
the EVAL-ADAU1466Z (see Figure 10). The USBi must
already be connected to the USB 2.0 port of the computer.
15789-012
Figure 10. Connecting the USBi to the Serial Peripheral Interface (SPI)
Control Port Header
CONNECTING THE AUDIO CABLES
To connect the audio cables to the evaluation board, take the
following steps:
1. Connect a stereo audio source to J9 (IN1) with a standard
3.5 mm (1/8 inch) stereo tip, ring, sleeve (TRS) audio cable.
The audio signals must be single-ended and line level, with a
maximum voltage of 2.8 V p-p. The tip of the plug is the left
channel of audio, the ring is the right channel of audio, and
the sleeve is the common or ground.
2. Connect headphones or powered speakers to J10 (OUT1).
Figure 11 shows the input source connection. Figure 12 shows
the output connection. Figure 13 shows the location of the
connectors on the board.
15789-013
Figure 11. Analog Stereo Input Source Connection
15789-014
Figure 12. Analog Stereo Output Connection

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IN
OUT
15789-015
Figure 13. Location of Stereo Output OUT1 (J10) and Stereo Input IN1 (J9), Rotated 90°

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SETTING UP COMMUNICATIONS IN SigmaStudio
To set up communications in SigmaStudio,takethefollowing
steps:
1. Start the SigmaStudio software by double clicking the
shortcut on the desktop or by finding and executing the
executable file in Windows Explorer.
2. To create a new project, select New Project from the File
menu or by pressing CTRL + N. (The default view of the
new project is the Hardware Configuration tab.)
3. In the Hardware Configuration tab, add the appropriate
components to the project space by clicking and dragging
them from the Tree ToolBox on the left of the window to
the empty white space located on the right of the window.
a. Click USBi to add a USBi component from the
Communication Channels subsection of the toolbox
(see Figure 14).
15789-016
Figure 14. Adding the USBi Communication Channel
b. Add an ADAU1466 component from the Processors
(ICs / DSPs) subsection of the toolbox (see Figure 15).
15789-017
Figure 15. Adding an ADAU1466
4. Ensure that SigmaStudio can detect the USBi on the USB
port of the PC as follows:
a. When SigmaStudio detects the USBi, the background
of the USB label is green in the USB Interface box
(see Figure 16).
15789-018
Figure 16. USBi Detected by SigmaStudio
b. When SigmaStudio cannot detect the USBi on the
USB port of the PC, the background of the USB label
is red (see Figure 17). This error can occur when the
USBi is not connected or when the drivers have been
installed incorrectly.
15789-019
Figure 17. USBi Not Detected by SigmaStudio
c. To conne c t t h e USBi block (USB interface) to the
target integrated circuit (IC) block, the ADAU1466,
click and drag a line, representing a wire, between the
blue pin of the USBi and the green pin of the IC (see
Figure 18). This connection allows the USBi to comm-
unicate with the ADAU1466. The corresponding
dropdown box of the USBi automatically fills with the
default mode and channel for that IC. In the case of
the ADAU1466, the default communications mode is
SPI, the default slave select line is 1, and the default
address is 0.
15789-020
Figure 18. Connecting the USBi to an ADAU1466 in the Hardware
Configuration Tab

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CREATING A BASIC SIGNAL FLOW
To create a signal processing flow, take the following steps:
1. Click the Schematic tab near the top of the window (see
Figure 19).
15789-021
Figure 19. Schematic Tab
2. To add the appropriate elements to the project space, click
and drag the elements from the Tree ToolBox on the left of
the window to the empty white space located on the right of
the window. The toolbox contains all of the algorithms that
can run in SigmaDSP.
a. To add an Input block, from the (IC1) ADAU1466 >
IO > Input > sdata 0-15 folder, click Input (see
Figure 20) and drag it into the project space to the right
of the toolbox (see Figure 21). By default, Channel 0
and Channel 1 are selected. This configuration matches
the analog audio source hardware connections shown
in Figure 11 and Figure 12; therefore, no modifications
are needed.
15789-022
Figure 20. Input Block Selection
15789-023
Figure 21. Input Block
b. Add two Output blocks as follows, ensuring that these
blocks are assigned to Channel 0 and Channel 1:
i. From the (IC1) ADAU1466 > IO > Output
folder, click Output (see Figure 22) and drag it
into the project space to the right of the toolbox.
15789-024
Figure 22. Output Block Selection
ii. Repeat the previous step to add another output
(see Figure 23).
15789-025
Figure 23. Output Blocks

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3. To connect each input channel to its corresponding output
channel, click and drag a line, representing a wire, between
the blue pin of the input channel and the green pin of the
output channel (see Figure 24). Input Channel 0 connects
to Output Channel 0 and Input Channel 1 connects to
Output Channel 1.
15789-026
Figure 24. Connected Signal Flow with Stereo Input and Stereo Output
The default register settings in SigmaStudio are configured to
match the hardware of the EVAL-ADAU1466Z, including the
signal routing between the ADAU1466 and the AD1938 codec.
When these steps are complete, the basic signal flow is complete,
and the stereo analog input source passes directly through the
SigmaDSP and connects to the stereo analog output.
Add Volume Control
1. To add a volume control block, from the Volume C ontrols
> Adjustable Gain > Clickless HW Slew folder, click Single
Volume and drag it into the project space to the right of
the toolbox.
15789-027
Figure 25. Single Volume Block Selection
2. By default, the volume control block has one input and one
output. In other words, it is a single channel. To add another
channel, right-click in the empty white space of the Single-
Volume block, and then from the dropdown menu that
appears, select Grow Algorithm > 1. Gain (HW Slew) > 1
(see Figure 26).
3. To delete the existing yellow connection wires (that is, the
connections added in Step 3 of the Creating a Basic Signal
Flow section), click the connection wires + Delete.
15789-028
Figure 26. Growing the Volume Control to Two Channels
4. Connect the blocks as shown in Figure 27.
15789-029
Figure 27. Completed Signal Flow with Volume Control
The schematic is ready to be compiled and downloaded to the
evaluation board.
DOWNLOADING THE PROGRAM TO THE DSP
To compile and download the code to the DSP, take the following
steps, click the Link/Compile/Download button in the main
toolbar of SigmaStudio (see Figure 28). Alternatively, press F7.
15789-030
Figure 28. Link/Compile/Download Button
After the code has been downloaded to the DSP, the following
occurs:
If the compiler completed compiling the project, the
compiled data downloads from SigmaStudio via the USBi
to the ADAU1466, and the SigmaDSP starts running.
The status bar turns from blue to green and the mode
displayed changes from Design Mode to Active:
Downloaded in the lower right corner of the window (see
Figure 29 and Figure 30). Until this point, SigmaStudio is
in design mode, as denoted by the blue bar at the bottom of
the screen and the words Design Mode displayed in the
lower right corner of the SigmaStudio window (see Figure 29).
15789-031
Figure 29. Design Mode and Blue Status Bar