Analog Devices SigmaDSP ADAU1463 Manuale utente

EVAL-ADAU1467Z

UG-1134

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 ADAU1463 and ADAU1467 SigmaDSP Audio Processors

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS.Rev. A (Draft) | Page 1 of 55

FEATURES

4 analog inputs

8 analog outputs

Stereo S/PDIF input and output

Self boot EEPROM

Headers for interfacing to off board peripherals

EVALUATION KIT CONTENTS

EVAL-ADAU1467Z 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 the analog input)

Headphones, desktop speakers, or audio input with a cable

terminated with a 3.5 mm (1/8 inch) plug (for the 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

ADAU1467 data sheet

AD1937 data sheet

Mic Canvas user guide

AN-1006 Application Note

GENERAL DESCRIPTION

This user guide details the design, setup, and operation of the

E VA L-ADAU1467Z evaluation board. This board is suitable for

the evaluation of, and software development for, the ADAU1467

and ADAU1463 SigmaDSP® processors. Note that the ADAU1467

and the ADAU1463 are functionally identical; however, the

ADAU1467 has more program and data memory than the

ADAU1463. When using this evaluation board to evaluate the

ADAU1463, select the ADAU1463 block (see the SigmaStudio

section) rather than the ADAU1467, as shown in Figure 11.

Performing this action informs the compiler to limit the amount of

memory allocated to match the ADAU1463. All other procedures

and instructions in this user guide are identical for the

ADAU1463 and ADAU1467.

This evaluation board provides access to the digital serial audio

ports of the ADAU1467. Four analog inputs and eight analog

outputs are provided by the AD1937 codec included in the

evaluation kit. Switches enable the evaluation of alternate

features provided by many of the pins with multiplexed

functionality, and numerous headers provide access to serial

audio ports and the master and slave control ports. These

selectable modes and headers make the EVA L -ADAU1467Z

well suited to prototyping larger application circuits, as well as

initial device evaluation. The ADAU1467 core is programmed

using Analog Devices, Inc., SigmaStudio® software, which

interfaces to the evaluation board via a USB interface (USBi).

The on-board, electronically erasable programmable read only

memory (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 ADAU1467 and AD1937 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

E VA L-ADAU1467Z Evaluation Board Photograph .................... 3

Setting Up the Evaluation Board .................................................... 4

Installing the SigmaStudio Software .......................................... 4

Disabling the Self Boot Switch.................................................... 4

Powering Up the Evaluation Board............................................ 5

Connecting the USBi ................................................................... 5

Connecting the Audio Cables..................................................... 6

Setting Up Communications in SigmaStudio............................ 8

Creating a Basic Signal Flow....................................................... 9

Downloading the Program to the DSP.................................... 11

Evaluation Board Features............................................................. 14

Reset ............................................................................................. 14

AD1937 Codec ........................................................................... 14

Serial Audio Data Input and Output ....................................... 17

Multipurpose Pins (MPx) ......................................................... 17

Status LEDs ................................................................................. 18

Auxiliary ADC Pins ................................................................... 19

Controlling Volume with a Potentiometer ............................. 19

S/PDIF Input and Output.......................................................... 22

Self Boot....................................................................................... 26

Slave Control Port ...................................................................... 28

Master Control Port ................................................................... 28

Mic Canvas Connector.............................................................. 28

Evaluation Board Hardware.......................................................... 29

IC Descriptions........................................................................... 29

Status LED Descriptions............................................................ 29

Evaluation Board Schematics and Artwork................................ 30

Ordering Information.................................................................... 51

Bill of Materials........................................................................... 51

Related Links................................................................................... 54

REVISION HISTORY

10/2017—Revision 0: Initial Version

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EVAL-ADAU1467Z EVALUATION BOARD PHOTOGRAPH

Figure 1.

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SETTING UP THE EVALUATION BOARD

Using the E VA L -ADAU1467Z 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 ADAU1467 is SigmaStudio, a fully graphical user

interface (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 and execute the executable.

Follow the prompts, and accept the license agreement to

install the software.

The drivers for the USBi are installed automatically by the

SigmaStudio installer. This may be confirmed by taking the

following steps:

1. Using the included cable, connect the USBi to the

computer.

2. Check that both the yellow I2C LED and the red power

indicator LED are illuminated (see Figure 3).

3. In the Windows Device Manager, under the Universal

Serial Bus controllers section, check that Analog Devices

USBi (programmed) is displayed (see Figure 2).

Figure 2. Confirming Driver Installation Using the Device Manager

Figure 3. State of the USBi Status LEDs After Driver Installation

DISABLING THE SELF BOOT SWITCH

When setting up the EVAL-ADAU1467Z evaluation board,

ensure that the SELFBOOT switch is in the off position.

SELFBOOT is the first switch of the four position, dual inline

package (DIP) switches, S3. The off position is toward the

bottom of the board, away from the silkscreen label, SELFBOOT.

The default position of this switch is the off (disabled) position,

which prevents the ADAU1467 from executing a self boot

operation at power-up. When the switch is in the on position, the

LED D3 is illuminated, and a self boot operation is executed,

causing the ADAU1467 to attempt to load code from the

EEPROM (U10) when it powers up or comes out of reset.

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POWERING UP THE EVALUATION BOARD

Power is supplied to the evaluation board using a dc power

supply with a female positive center plug. The plug has a 2.1 mm

inner diameter, a 5.5 mm outer diameter, and a 9.5 mm length

(see

Figure 4). The output must range between 4.5 V and 7 V and

must be able to source at least 1.5 A of current. Connect the power

supply to Connector J4. The unregulated supply powers the

operational amplifiers used in the active audio filters for the

analog audio inputs and outputs. An on-board linear regulator

(U17) generates the 3.3 V dc supply required for the ADAU1467

and AD1937, as well as other supporting ICs. When the power

supply is connected properly, LED D9 illuminates.

Figure 4. DC Power Supply Plug and Cable

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 E VA L -ADAU1467Z, as shown in Figure 5.

3. After the power supply is connected, the D9 status LED

(A_3V3) illuminates.

Figure 5. Connecting the Power Supply

CONNECTING THE USBI

Connect the ribbon cable of the USBi to the control port of the

E VA L-ADAU1467Z (see Figure 6). The USBi must already be

connected to the USB 2.0 port of the computer. When the USBi

is connected properly, LED D8 illuminates.

Figure 6. Connecting the USBi to the Serial Peripheral Interface (SPI)

Control Port Header

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CONNECTING THE AUDIO CABLES

To connect the audio cables to the evaluation board, take the

following steps:

1. Connect a stereo audio source to J14 (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 (1.0 VRMS). 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 J12 (OUT1).

Figure 7 shows the input source connection. Figure 8 shows the

output connection. Figure 9 shows the location of the

connectors on the board.

Figure 7. Analog Stereo Input Source Connection

Figure 8. Analog Stereo Output Connection

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Figure 9. Location of Stereo Output OUT1 (J12) and Stereo Input IN1 (J14)

OUT1

IN1

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UG-1134 EVAL-ADAU1467Z

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SETTING UP COMMUNICATIONS IN SigmaStudio

To set up communications in SigmaStudio, take the following 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 press 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 Tre e To olBox 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 10).

Figure 10. Adding the USBi Communication Channel

b. Add an ADAU1467 component from the Processors

(ICs/DSPs) subsection of the toolbox (see Figure 11).

Figure 11. Adding an ADAU1467

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 12).

Figure 12. 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 13). This error can occur when the

USBi is not connected or when the drivers are

installed incorrectly.

Figure 13. USBi Not Detected by SigmaStudio

c. To connect the USBi block (USB interface) to the

target integrated circuit (IC) block of the ADAU1467,

click and drag a line, representing a wire, between the

blue pin of the USBi and the green pin of the IC (see

Figure 14). This connection allows the USBi to

communicate with the ADAU1467. The

corresponding dropdown box of the USBi

automatically fills with the default mode and channel

for that IC. In the case of the ADAU1467, the default

communications mode is SPI, the default slave select

line is 1, and the default address is 0.

Figure 14. Connecting the USBi to an ADAU1467 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 15).

Figure 15. Schematic Tab

2. To add the appropriate elements to the project space, click

and drag the elements from the Tre e ToolB ox 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 on SigmaDSP.

a. To add an Input block, from the (IC1) ADAU1467 >

IO > Input > sdata 32-39 folder, click Input (see

Figure 16) and drag it into the project space to the right

of the toolbox (see Figure 17). By default, Channel 0

and Channel 1 are selected. This configuration matches

the analog audio source hardware connections shown

in Figure 7 and Figure 8; therefore, no modifications are

required.

Figure 16. Input Block Selection

Figure 17. 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) ADAU1467 > IO > Output folder,

click Output (see Figure 18) and drag it into the

project space to the right of the toolbox.

Figure 18. Output Block Selection

ii. Repeat the previous step to add another output

(see Figure 19).

Figure 19. Output Blocks

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 20). Input Channel 0 connects

to Output Channel 0, and Input Channel 1 connects to

Output Channel 1.

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UG-1134 EVAL-ADAU1467Z

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Figure 20. Connected Signal Flow with Stereo Input and Stereo Output

The default register settings in SigmaStudio are configured to

match the hardware of the E VA L-ADAU1467Z, including the

signal routing between the ADAU1467 and the AD1937 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

To add a volume control block, take the following steps:

1. From the Volume Controls > Adjustable Gain > Clickless

HW Slew folder, click Single Volume, and drag it into the

project space to the right of the toolbox.

Figure 21. 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, from the dropdown menu that appears,

select Grow Algorithm > 1. Gain (HW Slew) > 1 (see

Figure 22).

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.

Figure 22. Growing the Volume Control to Two Channels

4. Connect the blocks as shown in Figure 23.

Figure 23. Completed Signal Flow with Volume Control

The schematic is ready to be compiled and downloaded to the

evaluation board.

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