Analog Devices ADAU1772 Manuel utilisateur

Evaluation Board User Guide

UG-XXX

One Technology Way •P. O . Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: 781.329.4700 •Fax: 781.461.3113 •www.analog.com

Evaluating the ADAU1772 using the EVAL-ADAU1772Z

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 27

EVAL-ADAU1772Z PACKAGE CONTENTS

ADAU1772 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 ADAU1772

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. This evaluation board can be

3.8 V to 6 V supply; any of these are regulated to the voltages

required on the board. The PC board 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 microphones and

speakers. The master clock can be provided externally or by the

on-board 12.288 MHz passive crystal.

EVALUATION BOARD TOP SIDE AND BOTTOM SIDE

Figure 1. Evaluation Board Top Side Figure 2. Evaluation Board Bottom Side

Evaluation Board User Guide

UG-XXX

One Technology Way •P. O . Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: 781.329.4700 •Fax: 781.461.3113 •www.analog.com

Evaluating the ADAU1772 using the EVAL-ADAU1772Z

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 2 of 27

TABLE OF CONTENTS

EVAL-ADAU1772Z Package Contents.......................................... 1

Documents Needed.......................................................................... 1

General Description ......................................................................... 1

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...................................... 8

Using the Evaluation Board............................................................. 9

Power...............................................................................................9

Inputs and Outputs .......................................................................9

MP Pins.........................................................................................11

Serial Audio Interface .................................................................11

Communications Header...........................................................11

Self-Boot .......................................................................................11

Power-Down ............................................................................... 12

Hardware Description.................................................................... 13

Jumpers........................................................................................ 13

Integrated circuits (Ic) ............................................................... 13

LED .............................................................................................. 13

Evaluation Board Schematics and Artwork ................................ 14

Ordering Information.................................................................... 23

Bill of Materials........................................................................... 23

Related Links............................................................................... 24

REVISION HISTORY

6/12—Revision 0: Initial Version

Evaluation Board User Guide UG-177

Rev. 0 | Page 3 of 27

EVALUATION BOARD BLOCK DIAGRAMS

POWER

SUPPLY

REGULATION

C/SPI

COMMUNICATIONS

HEADER

ADAU1772

MP PINS

DIFFERENTIAL

STEREO OUTPUT

SINGLE-ENDED

STEREO OUTPUT

MASTER CLOCK

XTAL

OSCILLATOR

SELFBOOT

EEPROM

ANALOG MIC

INPUTS

STEREO LINE

INPUT

DIGITAL MIC

INPUTS

SERIAL AUDIO

CONNECTOR

OSC

POWER /

BYPASS

SWITCH

Figure 3. Functional Block Diagram

COMMUNICATIONS

HEADER

SERIAL AUDIO

CONNECTOR

SELFBOOT

EEPROM

ANALOG MIC

INPUTS

PDM DIGITAL

MIC INPUTS

STEREO LINE

INPUT

POWER/BYPASS

SWITCH

SINGLE

ENDED

STEREO

OUTPUT

DIFF

STEREO

OUTPUT

POWER SUPPLY

MP PINS

ADAU1772

CLOCK

XTAL

Figure 4. Board Layout Block Diagram

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Figure 5. Default Jumper and Switch Settings (A Solid Black Rectangle Indicates a Switch or Jumper Position)

Evaluation Board User Guide UG-177

Rev. 0 | Page 5 of 27

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 Deviecs, Inc., at sigmadsp@analog.com to request a

software key.

2. Chose which version of SigmaStudio you would like 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

follow 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 and prompts the user

to install drivers (see Figure 6).

08314-006

Figure 6. Found New Hardware Notification

Select the Install from a list or specific location (Advanced)

option and click Next > (see Figure 7).

8314-007

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).

08314-008

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).

08314-009

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).

Figure 10. USBI Driver Installed correctly

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DEFAULT SWITCH AND JUMPER SETTINGS

The J8, J10, J12, and J17 jumpers must be connected and

jumper J3 should be set to the “USB/EXT” power setting. The

MP pin jumpers (J9) can be connected as desired to use MP

pushbuttons or switches. The mic bias jumpers J11 and J14 can

be inserted if microphone bias is needed on inputs 0 and 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 the switch should be slid

to the left. S1 selects whether the ADAU1772 is to be powered

from 3.3 V or 1.8 V, the default is 3.3 V. If powering the board

via USBi it is important to make sure 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 it should be

slid to the right to disable self-boot.

POWERING UP THE BOARD

To power up the board, connect the ribbon cable of the USBi

to J1 (CONTROL PORT) of the EVAL-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.

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, first select it

in the Communication Channels subsection of the toolbox on the

left side of the Hardware Configuration tab, and add it to the project

space by clicking and dragging it to the right (seeFigure 11).

08314-010

Figure 11. Adding the USBi Communication Channel

If SigmaStudio cannot detect the USBi on the USB port of the

computer, then the background of the USB label will be red

(seeFigure 12). This may happen when the USBi is not connected

or when the drivers are incorrectly installed.

08314-011

Figure 12. USBi Not Detected by SigmaStudio

If SigmaStudio detects the USBi on the USB port of the computer,

the background of the USB label changes to orange (see Figure

13).

08314-012

Figure 13. 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 14).

Figure 14. Adding an ADAU1772

To use the USB interface to communicate with the target IC,

connect it by clicking and dragging a wire between the blue pin

of the USBi and the green pin of the IC (seeFigure 15). The

corresponding drop-down box of the USBi automatically fills

with the default mode and channel for that IC.

Figure 15. Connecting the USB Interface to an ADAU1772 IC

Evaluation Board User Guide UG-177

Rev. 0 | Page 7 of 27

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 16).

8314-021

Figure 16. Schematic Tab

The left side of the schematic view includes the Toolb ox, 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 17).

Figure 17. Input Cell Selection

Click and drag the Input cell into the blank schematic space to

the right of the Toolb ox (see Figure 18).

Figure 18. Input Cell

Because we are using inputs “2” and “3” as a stereo pair, deselect

inputs “0” and “1’” and select input boxes “2” and “3” (see

Figure 19).

Figure 19. Inputs 2 and 3 selected

Navigate to the IO >Audio Output folder and select the

Output cell (see Figure 20).

Figure 20. Output Cell Selection

Click and drag an output cell to the schematic. Do this again to

create two outputs (see Figure 21). Make sure the output cells

are assigned to “OUT0” and “OUT1” respectively.

Figure 21. 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

input “2” to “OUT0” and input “3” to “OUT1”(see Figure 22).

Figure 22. Connected Signal Flow

The basic signal flow is now complete with stereo I/O.

To add Volume control via the buttons labeled “VOL-“ and

“VOL+”, add jumpers to S5 and S6 on J9 (See Figure 23).

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Figure 23. Jumpers for Volume Pushbuttons

Navigate to the Hardware Configuration. In the bottom left

corner you will see the IC 1 – ADAU1772 Register Control tab

(see Figure 24).

Figure 24. ADAU1772 Register Control Tab

Click on it and find the Output/Serial Port tab in the top right

corner. In the bottom left corner of the Output/Serial Port tab

you will find the Push Button Vol section. Locate the drop-

down menu for Converters Controlled by PushButton

Volume: and change its value to All ADCs (see Figure 25).

Figure 25. (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 Dow n and the value of ADC_SDATA/PDMOUT/MP1

to Push-Button Volume Up (See Figure 26).

Figure 26. Pin/Pad Control tab

Your 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, click Link-

Compile-Download once in the main toolbar of SigmaStudio

(see Figure 27). Alternately, press the F7 key.

08314-037

Figure 27. Link-Compile-Download Button

If your project does not compile correctly an error will display (see

Figure 28). You must go back and check your work for mistakes.

Figure 28. Compile Error

The signal flow should now be running on the evaluation board,

and audio should pass from input to output. The volume can be

changed in real-time by using the buttons on the board.

Evaluation Board User Guide UG-177

Rev. 0 | Page 9 of 27

USING THE EVALUATION BOARD

POWER

Power can be supplied to the EVAL-ADAU1772Z one of three

ways. When jumper J3 is in the USB/EXT position, power can

be supplied by connecting the EVAL-ADUSB2EBZ(USBi)

board connected to Header J1 (See Figure 29) or by connecting

a tip positive 3.8 V dc to 6 V dc power supply on connector J2.

To supply power via a 1.5 V battery, jumper J3 must be set to

the BATT position and the battery connected to jumper J5. The

on-board regulator generates the 3.3 V dc or 1.8 V dc supply,

determined by S1, for the on-board circuitry. LED D1 lights up

when power is supplied to the board. To connect power to the

ADAU1772, connect the J8, J10, J12, and J17 jumpers (see

Figure 30).

Figure 29. Header J1, Control Port

Figure 30. Power Jumpers

INPUTS AND OUTPUTS

The board has multiple audio input and output options, including

digital and analog. There are four single-ended analog inputs

which are configurable as microphone or line inputs, dual

stereo digital microphone inputs, and two differential outputs

that can also be used as single-ended.

Analog Microphone Inputs

For microphone signals, the ADAU1772 analog inputs can be

configured in single-ended with PGA mode.

Microphone Bias

To add MICBIAS0 to AIN0, connect a jumper to header J11.

Similarly, you can add MICBIAS1 or MICBIAS0 to AIN1 by

connecting a jumper to headerJ14 (See Figure 31).

Figure 31. Mic Bias Headers

The Mic Bias circuitry must be enabled in the PGA/ADC tab of

SigmaStudio in order to use. You can also choose the

appropriate gain settings here as well (See Figure 32).

UG-177 Evaluation Board User Guide

Rev. 0 | Page 10 of 27

Figure 32. Mic Bias Enable and Gain

Stereo Line Input

The stereo input jack, J22, accepts a standard stereo TRS 1/8-inch

mini-plug (tip=left, ring=right) with two channels of audio.

Digital Microphones

PDM digital microphones can be connected to standard 0.100”

Headers J6 and J7. For example, the Analog Devices ADMP521

digital microphone on the ADMP521Z evaluation board will

plug directly into the header.

To utilize the digital microphone headers on the EVAL-

ADAU1772Z board, first make sure that the proper settings

have been made in SigmaStudio. Navigate to the PIN/PAD

Control tab in the Hardware Configuration/ADAU1772

down menu to “Clock Output” (See Figure 33).

Figure 33. MP6, Clock Output

To set the value of BCLK, go to the PLL & Clock Control tab

and change the value of the Output Clock drop down menu to

the desired division on MCLK (See Figure 34).

Figure 34. Clock Output Enabled/Divided

Now, set the input of the ADAU1772 to be the digital

microphones instead of the ADCs by toggling the appropriate

Decimator Source settings. Navigate to the PGA/ADC tab to

find and set the following switches (See Figure 35).

Figure 35. Decimator Source

You are now able to route the digital microphones via the

appropriate inputs on the Audio Input cell.

Headphone Output

The headphone output, J23, connects to any standard 1/8-inch

mini-plug stereo headphones. The output pins can be driven by

either a line output driver or a headphone driver by setting the

HP_EN_L and HP_EN_R bits in the headphone line output

select register (Address 0x0043). Headphones can be driven

either single ended or differentially, and there are bits to disable

the LN and RN pins if single ended.

Line Outputs

The analog output pins, J19 and J21, can be used to drive

differential loads. In their default settings, these pins can drive

line loads of 10 Ohms or greater.

To use an external speaker, wires can be soldered to

unpopulated header pads J13 and J16 (See Figure 36).

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