Analog Devices EVAL-ADAU1772Z User manual

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EVAL-ADAU1772Z
ANALOG DEVICES
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Evaluation Board User Guide
UG-477
One Technology Way •P. O. Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: [phone] •Fax: [phone] •www.analog.com
Evaluating the ADAU1772 Four ADC, Two DAC Low Power Codec
with Audio Processor
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.Rev. A | Page 1 of 28
EVAL-ADAU1772Z PACKAGE CONTENTS
EVAL-ADAU1772Z evaluation board
EVAL-ADUSB2EBZ (USBi) communications adapter
USB cable with Mini-B plug
Evaluation board/software quick start guide
DOCUMENTS NEEDED
ADAU1772 data sheet
AN-1006 Applications Note, Using the EVAL-ADUSB2EBZ
GENERAL DESCRIPTION
This user guide explains the design and setup of the EVAL-
ADAU1772Z evaluation board.
This evaluation board provides full access to all analog and digital
I/Os on the ADAU1772. The ADAU1772 core is controlled by
Analog Devices, Inc., SigmaStudio™ software, which interfaces to
the board via a USB connection. The E VA L-ADAU1772Z can be
powered by a single AAA battery, by the USB bus, or by a single
3.8 V to 6 V supply; any of these are regulated to the voltages
required on the board. The printed circuit board (PCB) is a 4-layer
design, with a single ground plane and a single power plane on the
inner layers. The board contains connectors for external micro-
phones and speakers. The master clock can be provided externally
or by the on-board 12.288 MHz passive crystal.
EVAL-ADAU1772Z EVALUATION BOARD TOP SIDE AND BOTTOM SIDE
11023-001
Figure 1. EVAL-ADAU1772Z Evaluation Board Top Side
11023-002
Figure 2. EVAL-ADAU1772Z Evaluation Board Bottom Side

UG-477 Evaluation Board User Guide
Rev. A | Page 2 of 28
TABLE OF CONTENTS
E VA L-ADAU1772Z Package Contents.......................................... 1
Documents Needed.......................................................................... 1
General Description ......................................................................... 1
E VA L-ADAU1772Z Evaluation Board Top Side and
Bottom Side ....................................................................................... 1
Revision History ............................................................................... 2
Evaluation Board Block Diagrams ................................................. 3
Setting Up the Evaluation Board .................................................... 5
Installing the SigmaStudio Software.......................................... 5
Installing the USBi Drivers ......................................................... 5
Default Switch and Jumper Settings .......................................... 6
Powering Up the Board ............................................................... 6
Connecting the Audio Cables..................................................... 6
Setting Up Communications in SigmaStudio........................... 6
Creating a Basic Signal Flow....................................................... 7
Downloading the Program to the DSP...................................... 9
Using the Evaluation Board .......................................................... 10
Power............................................................................................ 10
Inputs and Outputs .................................................................... 10
MP Pins........................................................................................ 12
Serial Audio Interface ................................................................ 13
Communications Header (J1) .................................................. 14
Self-Boot ...................................................................................... 14
Power-Down ............................................................................... 14
Hardware Description.................................................................... 15
Jumpers ........................................................................................ 15
Integrated Circuits (IC) ............................................................. 15
LED .............................................................................................. 15
Evaluation Board Schematics and Artwork................................ 16
Ordering Information.................................................................... 25
Bill of Materials........................................................................... 25
REVISION HISTORY
6/13—Rev. 0 to Rev. A
Added Figure 11; Renumbered Sequentially ................................ 6
11/12—Revision 0: Initial Version

Evaluation Board User Guide UG-477
Rev. A | Page 3 of 28
EVALUATION BOARD BLOCK DIAGRAMS
OSC
POWER
SUPPLY
REGULATION
POWER/
BYPASS
SWITCH
I2C/SPI
COMMUNICATIONS
HEADER
SELF-BOOT
EEPROM
ANALOG MIC
INPUTS
STEREO LINE
INPUT
DIGITAL MIC
INPUTS
SERIAL AUDIO
CONNECTOR
MP
PINS
DIFFERENTIAL
STEREO OUTPUT
SINGLE-ENDED
STEREO OUTPUT
XTAL
OSCILLATOR
MASTER
CLOCK
ADAU1772
11023-003
Figure 3. Functional Block Diagram
MP PINS
POWER SUPPLY
COMMUNICATIONS
HEADER
SELF-BOOT
EEPROM SERIAL AUDIO
CONNECTOR
PDM DIGITAL
MIC INPUTS
CLOCK
XTAL
ANALOG MIC
INPUTS
STEREO LINE
INPUT
POWER/BYPASS
SWITCH
DIFF
STEREO
OUTPUT
SINGLE-
ENDED
STEREO
OUTPUT
ADAU1772
11023-004
Figure 4. Board Layout Block Diagram

UG-477 Evaluation Board User Guide
Rev. A | Page 4 of 28
11023-005
Figure 5. Default Jumper and Switch Settings (A Solid Black Rectangle Indicates a Switch or Jumper Position)

Evaluation Board User Guide UG-477
Rev. A | Page 5 of 28
SETTING UP THE EVALUATION BOARD
INSTALLING THE SigmaStudio SOFTWARE
Users can download the latest version of SigmaStudio by
completing the following steps:
1. Go to www.analog.com/sigmastudiodownload and fill in the
Email: and Software Key: boxes. You will get a software
key with the evaluation board, or you can contact Analog
Devices at [email protected] to request a software key.
2. Chose which version of SigmaStudio you would like to use
and click SUBMIT.
3. Download the installer file, open the file, and extract the files
to your PC.
4. Install the Microsoft .NET Framework if you do not already
have it installed.
5. Install SigmaStudio by double-clicking Setup.exe and
following the prompts.
INSTALLING THE USBi DRIVERS
For Windows XP
SigmaStudio must be installed to use the USBi. When
SigmaStudio has been properly installed, connect the USBi to
an available USB port with the included USB cable. At this point,
Windows® XP recognizes the device (see Figure 6) and prompts
the user to install drivers.
11023-006
Figure 6. Found New Hardware Notification
Select the Install from a list or specific location (Advanced)
option and click Next > (see Figure 7).
11023-007
Figure 7. Found New Hardware Wizard—Installation
Click Search for the best driver in these locations, select
Include this location in the search, and click Browse to find
the SigmaStudio 3.7.x\USB drivers directory (see Figure 8).
11023-008
Figure 8. Windows Found New Hardware Wizard—Search and
Installation Options
When the warning about Windows Logo testing appears, click
Continue Anyway (see Figure 9).
11023-009
Figure 9. Windows Logo Testing Warning
The USBi drivers should now be installed successfully. Leave the
USBi connected to the PC.
For Windows 7 and Vista
Connect the USBi to an available USB port with the included USB
cable. At this point, Windows® 7 recognizes the device and installs
the drivers (see Figure 10).
11023-010
Figure 10. USBi Driver Installed Correctly

UG-477 Evaluation Board User Guide
Rev. A | Page 6 of 28
DEFAULT SWITCH AND JUMPER SETTINGS
The J8, J10, J12, and J17 jumpers must be connected, and the J3
jumper must be set to the USB/EXT power setting. The MP pin
jumpers (J9) can be connected as desired to use the MP push-buttons
or switches. The microphone bias jumpers, J11 and J14, can be
inserted if microphone bias is needed on Input 0 and Input 1.
Switch S7 selects whether the board is to be powered up or if audio
is to be bypassed from input to output with the board powered
down. For normal operation, slide the switch to the left. S1 selects
whether the ADAU1772 is powered from 3.3 V or 1.8 V; the
default is 3.3 V. If powering the board via the USBi, ensure that the
switch on the bottom of the USBi board is set to the correct voltage
(1.8 V or 3.3 V). S2 controls self-boot operation. By default, S2
is slid to the right to disable self-boot operation.
POWERING UP THE BOARD
To power up the evaluation board, connect the ribbon cable of
the USBi to J1 (CONTROL PORT) of the E VA L-ADAU1772Z.
CONNECTING THE AUDIO CABLES
Connect a stereo audio source to J22 (AIN2/3). Connect head-
phones or powered speakers to J23 (STEREO OUTPUT). The
labels for J22 and J23 are only visible on the bottom of the board.
11023-111
Figure 11. Stereo Out (J23), Left, and Stereo In (J22), Right
SETTING UP COMMUNICATIONS IN SigmaStudio
Start SigmaStudio by double-clicking the shortcut on the desktop.
Click File…New Project or press Ctrl+N to create a new project.
The default view of the new project is called the Hardware
Configuration tab.
To use the USBi in conjunction with SigmaStudio, select it in the
Communication Channels subsection of the toolbox on the left
side of the Hardware Configurationtab, and add it to the project
space by clicking and dragging it to the right (see Figure 12).
11023-011
Figure 12. Adding the USBi Communication Channel
If SigmaStudio cannot detect the USBi on the USB port of the PC,
the background of the USB label will be red (see Figure 13). This
can happen when the USBi is not connected or when the drivers
are incorrectly installed.
11023-012
Figure 13. USBi Not Detected by SigmaStudio
If SigmaStudio detects the USBi on the USB port of the PC, the
background of the USB label changes to orange (see Figure 14).
11023-013
Figure 14. USBi Detected by SigmaStudio
To add an ADAU1772 to the project, select it from the
Processors (ICs / DSPs) list and drag it to the project space
(see Figure 15).
11023-014
Figure 15. Adding an ADAU1772
To use the USB interface to communicate with the target integrated
circuit (IC), connect it by clicking and dragging a wire between the
blue pin of the USBi and the green pin of the IC (see Figure 16).
The corresponding drop-down box of the USBi automatically
fills with the default mode and channel for that IC.

Evaluation Board User Guide UG-477
Rev. A | Page 7 of 28
11023-015
Figure 16. Connecting the USB Interface to an ADAU1772 IC
CREATING A BASIC SIGNAL FLOW
To access the Schematic tab, where a signal processing flow
can be created, click the Schematic tab at the top of the screen
(see Figure 17).
11023-016
Figure 17. Schematic Tab
The left side of the schematic view includes the To olbox, which
contains all of the algorithms that can run in the SigmaDSP.
Select the Input cell from within the IO > Audio Input folder
(see Figure 18).
11023-017
Figure 18. Input Cell Selection
Click and drag the Input cell into the blank schematic space to
the right of the Toolbox (see Figure 19).
11023-018
Figure 19. Input Cell
Because Input 2 and Input 3 are being used as a stereo pair,
deselect the 0and 1and select the 2and 3(see Figure 20).
11023-019
Figure 20. Input 2 and Input 3 Selected
Navigate to the IO > Audio Output folder and select the Output
cell (see Figure 21).
11023-020
Figure 21. Output Cell Selection
Click and drag an output cell to the schematic. Do this again to
create two outputs (see Figure 22). Make sure the output cells are
assigned to OUT0and OUT1, respectively.

UG-477 Evaluation Board User Guide
Rev. A | Page 8 of 28
11023-021
Figure 22. Output Cells
Connect the cells together by left-clicking a blue output dot and
dragging to the green output dot of the next cell, connecting the
Input 2to OUT0 and Input 3to OUT1 (see Figure 23).
11023-022
Figure 23. Connected Signal Flow
The basic signal flow is now complete with the stereo I/O.
Add Volume Control
To add volume control via the VOL− and VOL+ buttons, add
jumpers to S5 and S6 on J9 (see Figure 24).
11023-023
Figure 24. Jumpers for Volume Pushbuttons
Navigate to the Hardware Configuration tab. In the bottom left
corner, the IC 1 – ADAU1772 Register Control tab is seen (see
Figure 25).
11023-024
Figure 25. ADAU1772 Register Control Tab
Click it and find the Output/Serial Port tab in the top right
corner. In the bottom left corner of the Output/Serial Port tab,
the Push Button Vol section is located. Locate the drop-down
menu for Converters Controlled by PushButton Volume: and
change its value to All ADCs (see Figure 26).
11023-025
Figure 26. (Output/Serial Port Tab)
Navigate to the Pin/Pad Control tab. In the Pin Modes section,
change the value of DAC_SDATA/MP0 to Push-button volume
down and the value of ADC_SDATA0/PDMOUT/MP1 to
Push-button volume up(see Figure 27).
11023-026
Figure 27. Pin/Pad Control tab
The schematic is ready to be compiled and downloaded to the
evaluation board.

Evaluation Board User Guide UG-477
Rev. A | Page 9 of 28
DOWNLOADING THE PROGRAM TO THE DSP
To compile and download the code to the DSP, click the
Link-Compile-Download button once in the main toolbar
of SigmaStudio (see Figure 28). Alternately, press the F7 key.
11023-027
Figure 28. Link-Compile-Download Button
If the project does not compile correctly, an error displays (see
Figure 29). If this occurs, go back and check your work for
mistakes.
11023-028
Figure 29. Compile Error
The signal flow should now be running on the evaluation board,
and the audio should pass from the input to the output. The
volume can be changed in real-time by using the buttons on
the board.