Analog Devices EVAL-ADAU1401EBZ Manual de usuario

Evaluation Board User Guide

UG-072

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

ADAU1401 SigmaDSP Evaluation Board

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 20

GENERAL DESCRIPTION

The EVAL-ADAU1401EBZ is a platform that operates all of the

ADAU1401’s functions with a full range of analog and digital

inputs and outputs. Digital I/O connections are available in

both S/PDIF and 3-wire serial data formats. The DSP is

controlled by the SigmaStudio™ software, which interfaces to

the board through a USB connection. This evaluation board is

voltages on the board. The PCB is in a 6” × 6” 4-layer design,

with a single ground plane and a single power plane on the

inner layers.

The ADAU1401 can be controlled via the USBi interface control

board connected to the I2C/SPI communications interface.

On-board self-boot EEPROM is included for operating the

board independently of the SigmaStudio software. Push-

buttons, LEDs, potentiometers, and other interface options on

the included GPIO board can be connected to the evaluation

board to enable GPIO control.

The EVAL-ADAU1401EBZ can also be used for evaluation of

the pin-compatible ADAU1701 and ADAU1702 SigmaDSP®s.

The differences between the ADAU1401, ADAU1701, and

ADAU1702 are:

•The ADAU1701 and ADAU1401 have 1024 program RAM

locations, while the ADAU1702 has 512 program RAM

locations.

•The ADAU1701 has 2k words of data memory, while the

ADAU1702 has 0.5k words of data memory.

•The ADAU1401 is qualified over the automotive

temperature range (−40°C to +105°C), while the

ADAU1701 and ADAU1702 are qualified over the

consumer temperature range (0°C to 70°C).

PACKAGE CONTENTS

EVAL-ADAU1401EBZ evaluation board

GPIO control board

USBi board

Universal power supply

Mini-USB cable

Evaluation board/software quick-start guide, including a

download link for the SigmaStudio tools

OTHER SUPPORTING DOCUMENTATION

When using this evaluation board, refer also to the following

documentation available at www.analog.com:

•ADAU1401, ADAU1701, ADAU1702 data sheets

•AN-923 Application Note, Designing a System Using the

ADAU1701/ ADAU1702 in Self-Boot Mode

•AN-951 Application Note, Using Hardware Controls with

SigmaDSP GPIO Pins

•AN-1006 Application Note, Using the EVAL-ADUSB2EBZ

•SigmaStudio help file (included with the software)

EVALUATION BOARD BLOCK DIAGRAM

CPLD

NALO

INPUTS

NALO

OUTPUTS

S/PDIF

RECEIVER AND

TRANSMITTER

POWER SUPPLY

REGULATION USB

INTERFACE

MULTI-

PURPOSE

INTERFACE

ADAU1401

08697-001

Figure 1.

UG-072 Evaluation Board User Guide

Rev. 0 | Page 2 of 20

TABLE OF CONTENTS

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

Package Contents.............................................................................. 1

Other Supporting Documentation................................................. 1

Evaluation Board Block Diagram................................................... 1

Revision History ............................................................................... 2

Quick Start Setup.............................................................................. 3

Preparing for the First Use .......................................................... 3

SigmaStudio Software Installation ............................................. 3

Powering up the Board ................................................................ 3

Hardware Setup—USBi ............................................................... 3

Connecting the Audio Cables..................................................... 3

Switch and Jumper Settings......................................................... 3

Your First SigmaStudio Project—EQ and Volume Control.... 4

Extended Setup ................................................................................. 5

Power Supply................................................................................. 5

Digital Audio Inputs and Outputs ............................................. 5

Analog Audio Inputs and Outputs............................................. 5

Master Clock Settings ...................................................................5

Control Interface ...........................................................................5

Switch and Jumper Functions......................................................6

Rotary Switch Settings..................................................................6

IC Functions...................................................................................7

LED Functions...............................................................................7

Reset ................................................................................................7

Self-Boot .........................................................................................7

Typical Setups ....................................................................................8

All Setups........................................................................................8

Analog Input and Analog Output...............................................8

S/PDIF Input and S/PDIF output................................................8

Using The GPIO Board.....................................................................9

Evaluation Board Schematics........................................................ 10

GPIO Interface Board Schematics ............................................... 17

Evaluation Board PCB Silkscreen Drawing................................ 19

REVISION HISTORY

2/10—Revision 0: Initial Version

Evaluation Board User Guide UG-072

Rev. 0 | Page 3 of 20

QUICK START SETUP

PREPARING FOR THE FIRST USE

To get started, use the following steps:

1. Install the SigmaStudio software.

2. Plug in the USBi.

3. Power up the board.

4. Connect the audio cables.

5. Set the switches and jumpers.

SIGMASTUDIO SOFTWARE INSTALLATION

1. Download the SigmaStudio.zip file from

http://www.analog.com/sigmastudiodownload and extract

the files to your PC. The key for the download is provided

in the box with the evaluation board.

2. Install Microsoft® .net Framework V 3.5. If you do not

already have it installed, this can be downloaded from the

Microsoft website.

3. Install SigmaStudio by double-clicking setup.exe and

following the prompts. A computer restart is not required.

POWERING UP THE BOARD

The board is powered from the included 6 V dc power supply

connected to J14. The power indicator LED, D11, should be lit.

HARDWARE SETUP—USBi

1. Plug in a power supply to the power jack, J14, of the EVAL-

ADAU1401EBZ evaluation board.

2. Plug the USBi into the USB port of the PC using the mini-

USB cable.

3. Plug the USBi into the control port on the evaluation board

(marked yellow in Figure 2).

4. Connect the USB cable to the computer and to the USBi.

5. When prompted for drivers, use the following options:

•Choose Install from a list or a specific location.

•Choose Search for the best driver in these locations.

•Check the box for Include this location in the search.

•The USBi driver is located in C:\Program Files\

Analog Devices Inc\Sigma Studio\USB drivers, click

Next.

•If prompted to choose a driver, select CyUSB.sys.

•In XP only, click Continue Anyway if a prompt

appears indicating the software has not passed

Windows Logo testing.

6. Make sure that Switch S4 and Switch S5 of the EVAL-

ADAU1401EBZ are set to the I2C position.

CONNECTING THE AUDIO CABLES

For this example, set up the board to have stereo analog inputs

and stereo analog outputs. To do so, use the following steps:

1. Connect the audio source to the IN 0/IN 1 jacks on the top

of the board (marked blue in Figure 2), using 3.5 mm (⅛”)

cables.

2. Connect the OUT 0/OUT 1 jacks on the top of the board

(marked green in Figure 2) to your speakers or

headphones.

SWITCH AND JUMPER SETTINGS

To configure the board for stereo analog input and output, make

sure the switches and jumpers are set as indicated in Figure 2.

08697-002

Figure 2. Evaluation Board Setup and Configuration

UG-072 Evaluation Board User Guide

Rev. 0 | Page 4 of 20

YOUR FIRST SIGMASTUDIO PROJECT—EQ AND

VOLUME CONTROL

The following is a procedure for building your first project in

SigmaStudio and running it on the evaluation board. This

procedure creates a simple design that creates a volume control

and five-band EQ on a stereo input signal.

1. Create a new project. SigmaStudio opens to the Hardware

Configuration Tab.

2. Drag an ADAU1401, E2Prom, and a USBi cell into the

blank white space.

Note: If you are using a processor other than the

ADAU1701 (for example, ADAU1702), drag that processor

out instead.

3. Connect the USBi cell to the ADAU1401 cell by clicking

and dragging from the top blue output pin to the green

input pin.

4. Connect the second USBi blue output pin to the green

input pin on the E2Prom cell.

The screen should appear as it does in Figure 3.

08697-003

Figure 3. Hardware Configuration Tab

5. Click the Schematic tab at the top of the screen.

6. In the Tree ToolBox section, expand the IO >Input. Click

and drag an Input cell to the work area.

7. Similarly, expand Filters > Second Order > Double

Precision > 2 Ch and click and drag Medium Size Eq to

the work area.

8. Right-click the general (second-order) cell labeled Gen

Filter1.

9. Click Grow Algorithm > 1. 2 Channel – Double

Precision > 4. This creates a five-band equalizer (EQ).

Each band’s general filter settings can be modified by

clicking the blue boxes on the cell.

10. Expand Volume C ontrols > Adjustable Gain > Shared

Slider > Clickless SW Slew and click and drag Single slew

11. Expand the IO > Output. Click and drag two Output cells

12. For each of the outputs, select a DAC output by clicking the

pull-down box. DAC0 and DAC1 are left and right

outputs, 0 and 1, from the ADAU1401 (output on J1 as

marked in green in Figure 2), respectively. DAC2 and

DAC3 are left and right channel, respectively for the

second stereo line output (J3 on the board).

13. Connect all the cells as depicted in Figure 4.

14. Make sure the board is powered and connected to the PC.

Click the Link-Compile-Download button in the

SigmaStudio toolbar, or select Link-Compile-Download

from the Action menu.

15. If the project compiled without error, you will be in Ready-

Download mode.

Your screen should now appear as it does in Figure 4.

16. Play your audio source; audio should now be available.

Move the volume control and filter sliders and hear the

effect on the output audio in real time.

08697-004

Figure 4. Schematic Tab, Full Design

Evaluation Board User Guide UG-072

Rev. 0 | Page 5 of 20

EXTENDED SETUP

POWER SUPPLY

The evaluation board is powered by a single supply through

Connector J14. The voltage on J14 should be 6 V dc to 9 V dc

with the ability to source at least 200 mA. The tip of the power

supply connector should be the positive voltage. This single

supply is regulated to 3.3 V for both the analog and digital

planes. The ADAU1401 generates 1.8 V from the 3.3 V supply

using its integrated regulator.

DIGITAL AUDIO INPUTS AND OUTPUTS

Digital signals can be connected to the board in two different

formats. The evaluation board can input or output a standard

2-channel S/PDIF stream. These I/Os can be either electrical (J5

and J4) or optical (U13 and U29). The S/PDIF I/O streams are

connected to the SDATA_IN0 and SDATA_OUT0 serial data

ports and are active according to specific switch settings on S2.

The copy protection bit on the S/PDIF transmitter is set; therefore,

audio devices, such as digital recorders, may ignore the data

output from the evaluation board.

PCM digital audio data can also be interfaced to the ADAU1401.

This data is connected to the ADAU1401 through the GPIO

interface board that is connected to J12. Input Header J3 and

Output Header J2 can connect to external ADCs, DACs, and

codecs with an I2S, left-justified, right-justified, or TDM data

stream. Master clock, left/right clock, and bit clock connections

are also on these headers.

Up to four stereo audio signals can be input or output on each

of these headers. These signals, when selected by the rotary

mode switches, interface directly to the serial data ports of the

ADAU1401. These headers also serve as the I/Os for the multi-

channel TDM streams.

ANALOG AUDIO INPUTS AND OUTPUTS

The evaluation board can input two analog audio signals and

can output four signals using the converters of the ADAU1401.

The full-scale input voltage is 2.0 V rms and the full-scale

output voltage is 0.9 V rms.

Mini-jack J11 is the input to the ADCs. Mini-jack J1 and Mini-

jack J3 are the DAC output connectors. The output is low-pass

filtered with either an active anti-image filter using a U3 op amp

or a passive RC filter. The active filters’ −3 dB cutoff frequency

is 100 kHz and has an approximate third-order Bessel (linear

phase) response.

MASTER CLOCK SETTINGS

The master clock connection of the ADAU1401 is set with

Jumper LK1 to Jumper LK4. These allow the user to select as a

source either the on-board oscillator connected to an external

crystal (OSC), the S/PDIF receiver’s master clock output (DIR),

an external clock from J12 (EXT), or a dedicated clock connection

on a BNC connector, J13 (BNC). If any setting other than OSC

is chosen, then disconnect Jumper LK16, which couples the

oscillator circuit of the ADAU1401 to the crystal. If this jumper

is not removed, there could be two clocks on the PCB running

at very close frequencies. These clocks could easily cause serious

performance degradation on the converters of the ADAU1401.

CONTROL INTERFACE

J16 is the connection for the USBi. The USBi is used to send I2C

and SPI control data to the ADAU1401 on the evaluation board.

This provides a real-time programming and tuning connection

to SigmaStudio.

Note that the evaluation board also includes footprints for an

obsolete USB interface using Connector J16. This section of the

board has been replaced by the USBi’s functionality.

UG-072 Evaluation Board User Guide

Rev. 0 | Page 6 of 20

SWITCH AND JUMPER FUNCTIONS

This evaluation board has many switches and jumpers; however,

for most applications, many of these need to be set only once

and can be ignored after that. Table 1 shows the function of

each jumper and switch on the evaluation board. For the S3

switch package, logic high (1) is left and logic low (0) is right,

assuming analog connectors are the top of the board.

Table 1. Switches and Jumpers

Reference

Designator Function

S1 Resets evaluation board.

S2 Signal routing mode select.

S3-1 Sets SELFBOOT.

S3-2 Sets PLL_MODE0.

S3-3 Sets PLL_MODE1.

S3-4 Sets ADDR0.

S3-5 Sets ADDR1.

S3-6 Reserved—set low.

S4 Sets I2C or SPI connection to the ADAU1401.

S5 USBi control connector—I2C (left) or SPI (right).

S6 Selects between RCA and optical S/PDIF input.

S7 Unused.

S8 Unused.

LK1 to LK4 Selects which master clock signal is sent to the

PLL of the ADAU1401.

LK5 to LK6,

LK9 to LK14

Connects the DAC outputs to active (A) or passive

(B) filters.

LK7 Sets the EEPROM write protect pin.

LK8 Selects 3.3 V or 5 V power connected to GPIO

control board.

LK15 Connects the 1.8 V output of the regulator

transistor to DVDD of the ADAU1401.

LK16 Connects/disconnects 12.288 MHz crystal from

oscillator circuit of the ADAU1401.

LK17 Connects/disconnects MCLK output to external

circuits. Connecting this may degrade the analog

audio performance of the board.

LK18 Connects 3.3 V to AVDD of the ADAU1401.

LK19 Writeback trigger input.

LK20 Connects 3.3 V to the AD8608 op amp.

LK21 Connects 3.3 V to the IOVDD of the ADAU1401.

LK25 Connects 3.3 V power to serial data buffer.

ROTARY SWITCH SETTINGS

S2 is a hex rotary switch that controls the input and output

signal routing on the evaluation board. The position of this

switch controls which serial data signals and clocks will be

routed to and from the ADAU1401. Table 3 shows the settings

of Rotary Switch S2. This switch controls the routing of digital

signals to and from the ADAU1701/ADAU1702 (U1) serial

input and output ports. Table 3 indicates which serial data

signals and clocks are sent to each of the four serial data inputs,

as well as to where the output signals of the serial port are

routed. An x in the table indicates that no signal is sent to that

input pin on the ADAU1701/ ADAU1702 in that mode. Switch

Position 4 to Switch Position F are unused.

The functions in Table 2 are available for each of the modes in

Table 3.

Table 2. S2 Settings

Mode Function

0 Inputs: S/PDIF, analog

Outputs: S/PDIF, analog, serial data (slave)

1 Inputs: analog, serial data

Outputs: analog, serial data (master or slave)

2 Inputs: analog, serial data

Outputs: S/PDIF, analog, serial data (master)

3 Inputs: S/PDIF, analog

Outputs: analog

The multipurpose pins of the ADAU1401 must be set into serial

data I/O modes to use the board’s digital I/O.

Table 3. S2 Settings1

SW2 Position SDATA_IN0

SDATA_IN1 to

SDATA_IN3

SDATA_OUT0 to

SDATA_OUT3 SPDIF Tx Clock Master

0 S/PDIF Rx x External Output 0 to

External Output 3

SDATA_OUT0 S/PDIF Rx

1 x x x x ADAU1401 crystal oscillator

2 External Input 0 External Input 1 to

External Input 3

External Output 0 to

External Output 3

SDATA_OUT0 ADAU1401 output

3 S/PDIF Rx x x x S/PDIF Rx

4 to F x x x x x

1x = no signal is sent to the input pin.

Evaluation Board User Guide UG-072

Rev. 0 | Page 7 of 20

IC FUNCTIONS

Table 4 explains the function of each IC on the evaluation

board. The Lattice CPLD (U2) is only used for routing signals

on the board and performs no decoding or signal conditioning.

Table 4. IC Functions

Reference

Designator Function

U1 ADAU1401 SigmaDSP audio processor

U2 Lattice M4A3-64/32 CPLD for signal routing

U3 AD8608 quad op amp for analog audio output

buffering

U4 CS8416 S/PDIF receiver

U5 74LVC541 for buffering serial output signals

U6 CS8406 S/PDIF transmitter

U8 ADP3336-3 regulator—3.3 V analog supply

U10 ADM811RART reset generator

U11 Unused

U12 74LVC1G240 inverter

U14 Self-boot EEPROM: 32 kB × 8 (256 kB)

U18 Unused

U19 Unused

U20 Unused

LED FUNCTIONS

D11 indicates that the 3.3 V supply is present through an

external supply.

RESET

The evaluation board can be reset with a push-button switch,

S1. This active-low reset signal is debounced by the ADM811

(U10). This reset signal affects the ADAU1401 and S/PDIF

receiver and transmitter. The board may also be reset by

disconnecting the power. After reset, the ADAU1401 does not

pass audio, and a control port write has to be performed so that

signals are output again.

SELF-BOOT

The self-boot function of the ADAU1401 can be set up on the

evaluation board. This allows the ADAU1401 to boot itself from

EEPROM U14 when it is brought out of reset. The ADAU1401 is

the master on the I2C bus during the self-boot operation; however,

another bus master device may take control afterwards.

The first step in setting up self-boot mode is to load a program

from SigmaStudio into the EEPROM. This is done by using the

Load latest compilation to EEPROM function found by right-

clicking on the IC in the Hardware Configuration window.

This should be done while the S3-1 self-boot switch is set low

(right). Note that the jumper should not be on LK7 for this

operation because the EEPROM cannot be write-protected.

After the program is saved, Switch S3-1 can be set high (left),

which sets the ADAU1401 into self-boot mode the next time it

is powered on or reset.

UG-072 Evaluation Board User Guide

Rev. 0 | Page 8 of 20

TYPICAL SETUPS

ALL SETUPS

The switch and jumper settings in Tabl e 5 are common for all

typical setups described in this user guide.

Table 5. Standard Switch and Jumper Settings

Component Setting

LK15, LK18,

LK20 to LK25

Jumper on

LK7, LK19 Jumper off

S3-4 0 (right)

S3-5 0 (right)

S4 Down (for default I2C communication)

S5 Left (for default I2C communication)

ANALOG INPUT AND ANALOG OUTPUT

Input comes from the stereo analog inputs to Pin ADC0 and

Pin ADC1 of the ADAU1401 and outputs on the DACs. Default

outputs for the ADC inputs are DAC outputs, VOUT2 and

VOUT3.

In this setup, the master clock is generated by the ADAU1401’s

oscillator connected to a 12.288 MHz crystal. Table 6 explains

how the switches and jumpers need to be set up for this mode.

Any component setting not mentioned in Table 6 or in Tabl e 5

can be considered don’t care.

The settings in Table 5 and Table 6 are also appropriate for

using the serial data I/Os.

Table 6. Evaluation Board Settings for Analog I/O

Component Setting

S2 Position 1

S3-2 0 (right)

S3-3 1 (left)

LK1 Connected

LK2 to LK4 Disconnected

LK5 to LK6,

LK9 to LK14

A for active filter, and B for passive filter on

DAC outputs

LK16 Connected

LK17 Disconnected

S/PDIF INPUT AND S/PDIF OUTPUT

Input comes from the stereo S/PDIF receiver to SDATA_IN0

(Pin 10) of the ADAU1401 and outputs on whichever outputs

(SDATA_OUTx) are designated in the SigmaStudio software.

The default output for the input is SDATA_OUT0 (Pin 15).

In this setup, the master clock and serial data clocks are

generated by the CS8416. Table 7 explains how the switches

and jumpers need to be set up for this mode. Any component

setting not mentioned in Table 7 can be considered don’t care.

Table 7. Evaluation Board Settings for S/PDIF Input, Analog

and S/PDIF Output

Component Setting

S2 Position 0

S3-2 0 (right)

S3-3 1 (left)

LK1, LK3 to LK4 Disconnected

LK2 Connected

LK5 to LK6,

LK9 to LK14

A for active filter, and B for passive filter on

DAC outputs

LK16 Disconnected

LK17 Connected

Evaluation Board User Guide UG-072

Rev. 0 | Page 9 of 20

USING THE GPIO BOARD

The GPIO board is provided with the EVAL-ADAU1401EBZ to

connect control and data interfaces to the multipurpose pins of

the ADAU1401. These controls are broken out on a separate

board from the main evaluation board so that different

configurations beyond what is supplied can be easily connected.

The functions on this board include potentiometers, LEDs,

push buttons, switches, and a rotary encoder.

Table 8 shows how the jumpers should be set to properly route

the controls to the ADAU1401’s MPx pins. The settings in

Table 8 assume that the board is oriented with a 50-pin

connector, J1, on the left of the board.

The 12 jumpers, J3 to J14, should be left on the pins to connect

the MPx pins to the control interfaces. These jumpers should be

removed if the GPIO board is being used to interface serial

audio data to the ADAU1401 through Header J2 and Header J3.

JP1 and JP2 are used to route the serial data ports’ master clock

signals.

The GPIO board uses a Hirose PCN10C-50S-2.54DS connector

to interface to the ADAU1401 evaluation board. Using this

connector and the pinout in Figure 10, any set of controls can

be connected to the multipurpose pins of the ADAU1401. The

GPIO board is powered through Pin 1 of J12 on the evaluation

board. The voltage supplied to the GPIO board is set with

LK8—3.3 V in Position A or 5.0 V in Position B.

Table 8. GPIO Board Jumper Settings and Functions

ADAU1401 Pin Jumper Control Routed to MPx Pin Jumper Setting Notes

MP0 JP9 LED D20 Left

Push Button S10 Right Use debounce, signal low on button press

MP1 JP10 LED D21 Left

Push Button S11 Right Use debounce, signal low on button press

MP2 JP11 Rotary encoder Left Must be set to input GPIO, no debounce

Potentiometer R28 Right Read ADC value from Register 0x080A

MP3 JP12 Rotary encoder Left Must be set to input GPIO, no debounce

Potentiometer R30 Right Read ADC value from Register 0x080B

MP4 JP13 Switch S12 Left

Push Button S13 Right Use debounce, signal low on button press

MP5 JP14 Switch S14 Left

Push Button S14 Right Use debounce, signal low on button press

MP6 JP8 Push Button S7 Left Use debounce, signal low on button press

Switch S8 Right

MP7 JP7 Push Button S5 Left Use debounce, signal low on button press

Switch S6 Right

MP8 JP6 Potentiometer R4 Left Read ADC value from Register 0x080C

LED D2 Right

MP9 JP5 Potentiometer R3 Left Read ADC value from Register 0x0809

LED D1 Right

MP10 JP4 Push-button S3 Left Use debounce, signal low on button press

Switch S4 Right

MP11 JP3 Push Button S1 Left Use debounce, signal low on button press

Switch S2 Right

UG-072 Evaluation Board User Guide

Rev. 0 | Page 10 of 20

EVALUATION BOARD SCHEMATICS

08697-005

Figure 5. ADAU1401 Evaluation Board Schematic

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