Analog Devices EVAL-ADUSB2EBZ Manuale utente

Evaluation Board User Guide

UG-477

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 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

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

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 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 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.

UG-477 Evaluation Board User Guide

Rev. A | Page 10 of 28

USING THE EVALUATION BOARD

POWER

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

three ways. When Jumper J3 is in the USB/EXT position, power

can be supplied by connecting the E VA L-ADUSB2EBZ (USBi)

board connected to J1 (see Figure 30) or by connecting a tip

positive 3.8 V dc to 6 V dc power supply on J2.

11023-029

Figure 30. Header J1, Control Port

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

position, and the battery must be connected to 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 31).

11023-030

Figure 31. Power Jumpers

INPUTS AND OUTPUTS

The E VA L -ADAU1772Z has multiple audio input and output

options, including digital and analog. There are four single-ended

analog inputs that are configurable as microphone or line inputs,

dual stereo digital microphone inputs, and two differential outputs

that can also be used in a single-ended configuration.

Analog Microphone Inputs

For microphone signals, the ADAU1772 analog inputs can be

configured as single-ended inputs with optional programmable

gain amplifier (PGA) mode.

Microphone Bias

To add MBIAS0 to AIN0, connect a jumper to the J11 header.

Similarly, MBIAS1 or MBIAS0 can be added to AIN1 by

connecting a jumper to the J14 header (see Figure 32).

11023-031

Figure 32. Microphone Bias Headers

Enable the microphone bias circuitry in the PGA/ADC tab of

SigmaStudio to use it. The appropriate gain settings can also be

chosen here (see Figure 33).

11023-032

Figure 33. Microphone Bias Enable and Gain

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