Analog devices Eval-ssm6515 User manual

User Guide | EVAL-SSM6515

UG-2030

Evaluating the SSM6515 Ultra Low Power, Class-D Audio Amplifier

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | 1 of 23

EVALUATION KIT CONTENTS

►EVAL-SSM6515Z evaluation board

►EVAL-ADUSB2EBZ (USBi) communications adapter

►USB cable with mini USB plug

DOCUMENTS NEEDED

►SSM6515 data sheet

GENERAL DESCRIPTION

This user guide explains the design and setup of the EVAL-

SSM6515Z evaluation board.

The EVAL-SSM6515Z provides access to all analog and digital

inputs/outputs on the SSM6515.

The SSM6515 amplifier is controlled by Analog Devices, Inc.,

SigmaStudio® software, which interfaces to the EVAL-SSM6515Z

via a USB connection. The EVAL-SSM6515Z can be powered by

the USB bus or by a single 3.8 V to 5 V supply. These supplies are

regulated to the voltages required on the EVAL-SSM6515Z. The

printed circuit board (PCB) is a 4-layer design, with a ground plane

and a power plane on the inner layers. The EVAL-SSM6515Z con-

tains 0.1 in. pitch male headers for connecting to external speakers.

The minimum speaker load must be 8 Ω. The EVAL-SSM6515Z

consists of two SSM6515s for evaluating the stereo headphone

output.

For full details on the SSM6515, see the SSM6515 data sheet,

which must be consulted in conjunction with this user guide when

using the EVAL-SSM6515Z.

EVALUATION BOARD PHOTOGRAPH

Figure 1.

Analog Devices is in the process of updating documentation to provide terminology and language that is culturally appropriate. This is a process

with a wide scope and will be phased in as quickly as possible. Thank you for your patience.

User Guide EVAL-SSM6515

TABLE OF CONTENTS

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Evaluation Kit Contents......................................... 1

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

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

Evaluation Board Photograph................................1

Evaluation Board Block Diagram...........................3

Hardware Description............................................ 4

Jumpers and Connectors................................... 4

Installing the SigmaStudio Software......................6

Installing the USBi (EVAL-ADUSB2EBZ)

Drivers..............................................................6

Adding the DLL File............................................7

Setting Up SigmaStudio..................................... 8

Setting Up the Evaluation Board......................... 10

Default Switch and Jumper Settings (S/

PDIF Input, I2C Mode)....................................10

Powering Up the EVAL-SSM6515Z..................11

Power............................................................... 11

Using I2C Control Mode....................................11

Using SigmaStudio with USBi for I2C Control.. 11

External I2S Input, I2C Mode............................ 13

Default Switch and Jumper Settings (PDM

Input, I2C Mode)............................................. 13

Default Switch and Jumper Settings (S/

PDIF Input, Standalone Mode).......................14

Evaluation Board Schematics and Artwork......... 15

Ordering Information............................................22

Bill of Materials.................................................22

REVISION HISTORY

4/2022—Revision 0: Initial Version

User Guide EVAL-SSM6515

EVALUATION BOARD BLOCK DIAGRAM

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Figure 2. EVAL-SSM6515Z Block Diagram

User Guide EVAL-SSM6515

HARDWARE DESCRIPTION

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JUMPERS AND CONNECTORS

Table 1. Connector and Jack Descriptions

Reference

Designator Type Functional Name Description

J1 DC jack 5 V dc input Barrel jack that provides external power to the EVAL-SSM6515. J1 accepts a 3.8 V dc to 5 V

dc input.

J2 Binding post 5 V Binding post used to connect the external 5 V supply to the EVAL-SSM6515.

J5 2-pin header, 0.1 in. pitch PVDD (AMP1) Jumper connects PVDD to the SSM6515 (AMP1).

J6 6-pin header, 0.1 in. pitch IOVDD select Used to select the IOVDD source: 1.2 V regulator, 1.8 V regulator, or external 1.8 V IOVDD

source.

J7 2-pin header, 0.1 in. pitch External PVDD Used to connect the external 1.8 V PVDD supply.

J8 3-pin header, 0.1 in pitch Pulse density modulation

(PDM) LR_SEL (AMP1)

Used to select the PDM left and right channels for AMP1 in standalone mode.

J9 3-pin header, 0.1 in. pitch Mode select (AMP1) Used to select the I2S or PDM mode for AMP1 in standalone mode.

J10 Binding post GND Connect to GND or 0 V of the power supply.

J11 10-pin header, 0.1 in. pitch USB interface (USBi) header 10-pin header used to connect the USBi.

J12 RCA cinch jack Coaxial S/PDIF input Used to connect the coaxial S/PDIF input.

J13 9-pin header, 0.1 in. pitch S/PDIF, external I2S, PDM

Input

9-pin header for selecting the internal input source (S/PDIF) or connecting the external

I2S/PDM input source for the amplifiers.

J14 2-pin header, 0.1 in. pitch S/PDIF master clock (MCLK)

out

Used to access the recovered master clock from the S/PDIF receiver.

J15 3-pin header, 0.1 in. pitch I2S/PDM select (AMP1) Used to select the left and right channel in I2S standalone mode or the PDM_FS of 3 MHz or 6

MHz for AMP1 in PDM standalone mode.

J18 2-pin header, 0.1 in. pitch PVDD (AMP2) Jumper connects PVDD to the SSM6515 (AMP2).

J19 3-pin header, 0.1 in. pitch PDM LR_SEL (AMP2) Used to select the PDM left and right channels for AMP2 in standalone mode.

J20 3-pin header, 0.1 in. pitch I2S/PDM select (AMP2) Used to select the I2S or PDM input for AMP2 in standalone mode.

J21 3-pin header, 0.1 in. pitch I2S/PDM select (AMP2) Used to select the left and right channels in I2S standalone mode or the PDM_FS of 3 MHz or

6 MHz for AMP2 in PDM standalone mode.

J22 2-pin header, 0.1 in. pitch I2C SCL (AMP2) Jumper connects the USBi SCL to AMP2. Leave open in standalone mode.

J23 2-pin header, 0.1 in. pitch I2C SDA (AMP2) Jumper connects the USBi SDA to AMP2. Leave open in standalone mode.

J24 2-pin header, 0.1 in. pitch I2C SCL (AMP1) Jumper connects the USBi SCL to AMP1. Leave open in standalone mode.

J25 2-pin header, 0.1 in. pitch I2C SDA (AMP1) Jumper connects the USBi SDA to AMP1. Leave open in standalone mode.

J26 2-pin header, 0.1 in. pitch FSYNC Jumper connects FSYNC to AMP2. Leave open for PDM in standalone mode.

J27 2-pin header, 0.1 in. pitch FSYNC Jumper connects FSYNC to AMP1. Leave open for PDM in standalone mode.

J28 2-pin header, 0.1 in. pitch IOVDD (AMP1) Jumper connects IOVDD to the SSM6515 (AMP1).

J29 2-pin header, 0.1 in. pitch IOVDD (AMP2) Jumper connects IOVDD to the SSM6515 (AMP2).

J30 2-pin header, 0.1 in. pitch Do not use Leave this jumper open (Reserved for internal use).

J31 2-pin header, 0.1 in. pitch Do not use Leave this jumper open (Reserved for internal use).

J32 2-pin header, 0.1 in. pitch External IOVDD Used to connect the external 1.2 V to 1.8 V IOVDD supply.

J33 3-pin header, 0.1 in. pitch I2C address select (AMP2) J33 and J34 are used to select the I2C address for AMP2. Connect J33 to PVDD in standalone

mode.

J34 2-pin header, 0.1 in. pitch I2C address select (AMP2) J33 and J34 are used to select the I2C address for AMP2. Shunt J34 in standalone mode.

J35 3-pin header, 0.1 in. pitch I2C address select (AMP1) J35 and J36 are used to select the I2C address for AMP1. Connect J35 to PVDD in standalone

mode.

J36 2-pin header, 0.1 in. pitch I2C address select (AMP1) J35 and J36 are used to select the I2C address for AMP1. Shunt J36 in standalone mode.

J37 4-pin header, 0.1 in. pitch AMP1 output AMP1 pre-filter output.

J38 4-pin header, 0.1 in. pitch AMP1 output AMP1 pre-filter output.

J39 4-pin header, 0.1 in. pitch AMP2 output AMP2 post-filter output.

J40 4-pin header, 0.1 in. pitch AMP2 output AMP2 post-filter output.

JP1 3-pin header, 0.1 in. pitch PVDD select Used to select the 1.8 V regulator or external 1.8 V PVDD source.

JP2 2-pin header, 0.1 in. pitch S/PDIF reset jumper Shunt JP2 to keep the S/PDIF receiver in reset.

JP3 2-pin header, 0.1 in. pitch SD_OSC (active low) Shunt JP3 to disable the 12.288 MHz oscillator input to the S/PDIF receiver.

User Guide EVAL-SSM6515

HARDWARE DESCRIPTION

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Table 1. Connector and Jack Descriptions

Reference

Designator Type Functional Name Description

S3 Single pole double throw

(SPDT) slide switch

S/PDIF source select Select the optical S/PDIF input or coaxial S/PDIF input.

S4 Momentary switch S/PDIF reset button Push S4 to reset the S/PDIF receiver.

U4 Optical fiber connector S/PDIF optical input S/PDIF optical input.

J13 (I2S Input Selection Header)

The J13 is a 9-pin header. Pin 1, Pin 4, and Pin 7 of J13 are

GND, whereas Pin 2, Pin 5, and Pin 8 are used as signal inputs.

The outermost pins, Pin 3, Pin 6, and Pin 9, are connected to the

S/PDIF receiver I2S outputs. See Table 2 for the pin connections.

The I2S signals must be 1.8 V p-p.

Table 2. J13 9-Pin (3×3) Header Connections

Pin Signal Test Conditions/Comments

1, 4, 7 GND GND

2 SDATA SSM6515 serial data input

5 FSYNC SSM6515 frame sync input

8 BCLK SSM6515 bit clock input

3 SDATA S/PDIF S/PDIF serial data output

6 FSYNC S/PDIF S/PDIF frame sync output

9 BCLK S/PDIF S/PDIF bit clock output

User Guide EVAL-SSM6515

INSTALLING THE SIGMASTUDIO SOFTWARE

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Download and install the latest version of SigmaStudio by complet-

ing the following steps:

1. Install the latest version of the Microsoft® .NET framework if it is

not already installed on the PC. The latest version of the .NET

framework can be downloaded from the Microsoft website.

2. Go to www.analog.com/SigmaStudio and download the latest

version of SigmaStudio from the Downloads And Related

Software section.

3. Download the installer and run the executable file. Follow the

prompts, including accepting the license agreement, to install

the software.

INSTALLING THE USBI (EVAL-ADUSB2EBZ)

DRIVERS

SigmaStudio must be installed to use the USBi. When the SigmaS-

tudio installation completes, perform the following steps:

1. Connect the USBi to an available USB 2.0 port using the USB

cable included in the evaluation board kit (the USBi does not

function properly with a USB 3.0 port).

2. Install the driver software (see the Using Windows XP section

or the Using Windows 7 or Windows Vista section for more

information).

Using Windows XP

After connecting the USBi to the USB 2.0 port, Windows® XP

recognizes the device (see Figure 3) and prompts the user to install

the drivers.

Figure 3. Found New Hardware Notification

Use the Found New Hardware Wizard to complete the installation

of the drivers. The installation of the drivers is shown in the follow-

ing steps:

1. From the Found New Hardware Wizard window, select the

Install from a list or specific location (Advanced) option and

click Next > (see Figure 4).

Figure 4. Found New Hardware Wizard: Installation

2. Select Search for the best driver in these locations, select

Include this location in the search:, and click Browse to find

the USB drivers subdirectory within the SigmaStudio directory

(see Figure 5). Then, click Next >.

Figure 5. Found New Hardware Wizard: Search and Installation Options

3. When the Hardware Installation warning appears, click Con-

tinue Anyway (see Figure 6).

Figure 6. Hardware Installation Warning

User Guide EVAL-SSM6515

INSTALLING THE SIGMASTUDIO SOFTWARE

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The USBi drivers are now installed. Leave the USBi connected to

the PC.

Using Windows 7 or Windows Vista

After connecting the USBi to the USB 2.0 port, Windows 7 or

Windows Vista recognizes the device and installs the drivers auto-

matically (see Figure 7). When the installation completes, leave the

USBi connected to the PC.

Figure 7. USBi Drivers Installed Properly

Confirming Proper Installation of the USBi

Drivers

To confirm that the USBi drivers are installed properly, complete the

following steps:

1. With the USBi still connected to the USB 2.0 port of the PC,

check that both the yellow I2C LED and the red power indicator

LED are illuminated (see Figure 8).

Figure 8. State of USBi Status LEDs After Driver Installation

2. In the Windows Device Manager, under the Universal Serial

Bus controllers section, check that Analog Devices USBi

(programmed) appears as shown in Figure 9.

Figure 9. Confirming Driver Installation Using the Device Manager

ADDING THE DLL FILE

Add the provided SSM6515.dll file manually by copying the

SSM6515.dll file to the C:\ProgramFiles\AnalogDevices\SigmaS-

tudio folder in the PC. To add the SSM6515 to the Tree ToolBox,

click Tools and then click Add-Ins Browser... (as shown in Figure

10). The AddIns popup window opens (see Figure 11).

In the list of devices displayed in the AddIns popup window, ensure

the SSM6515 checkbox is selected, as shown in Figure 11. Click

File and then click Save before exiting the window.

Figure 10. Adding an SSM6515

Figure 11. Saving the SSM6515.dll File in the AddIns Popup Window

User Guide EVAL-SSM6515

INSTALLING THE SIGMASTUDIO SOFTWARE

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SETTING UP SIGMASTUDIO

Start SigmaStudio by double clicking the shortcut on the desktop.

Click File and then click New Project, or press Ctrl + N to create

a new project, as shown in Figure 12. The default view of the new

project is the Hardware Configuration tab. Figure 13 shows a new

SigmaStudio project. Figure 12. New Project

Figure 13. New SigmaStudio Project

User Guide EVAL-SSM6515

INSTALLING THE SIGMASTUDIO SOFTWARE

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To use the USBi with SigmaStudio, select USBi from the Commu-

nication Channels list of the Tree Toolbox (see Figure 14), and

drag it to the right to add it to the project space.

Figure 14. Adding the USBi Communication Channel

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

PC, the background of the USB label is red (see Figure 15). The

label turns red when the USBi is not connected or when the drivers

are installed incorrectly.

Figure 15. USBi Not Detected by SigmaStudio

If SigmaStudio detects the USBi board on the USB port of the PC,

the background of the USB label is green (see Figure 16).

Figure 16. USBi Detected by SigmaStudio

Add two SSM6515s from the Tree ToolBox to the Hardware

Configuration tab by selecting SSM6515 from the Processors

(ICs / DSPs) list and dragging it to the project space (see Figure

10).

To use the USBi board to communicate with the target IC, connect

the IC by clicking and dragging a wire between the blue pin of the

USBi and the green pin of the IC (see Figure 17). The correspond-

ing dropdown box of the USBi automatically fills with the default

mode and channel for that IC.

Figure 17. Connecting the USBi to an SSM6515 IC

User Guide EVAL-SSM6515

SETTING UP THE EVALUATION BOARD

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DEFAULT SWITCH AND JUMPER SETTINGS (S/

PDIF INPUT, I2C MODE)

The EVAL-SSM6515Z consists of two SSM6515s for stereo head-

phone output. Refer to Figure 19 for the switch and jumper settings.

These settings set the EVAL-SSM6515Z for external I2S input with

I2C control using the USBi.

The EVAL-SSM6515Z provides multiple options for configuring the

SSM6515. See Table 3 for the I2C mode and device address

settings. By default, the EVAL-SSM6515Z is configured for Address

0x34 (AMP1) and Address 0x35 (AMP2). If other addresses are

required, refer to Table 3.

To use the on-board S/PDIF receiver I2S input, insert jumpers for

J13 as shown in Figure 18.

Figure 18. S/PDIF as I2S Source

Figure 19. S/PDIF Input, I2C Mode

User Guide EVAL-SSM6515

SETTING UP THE EVALUATION BOARD

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Table 3. I2C or Standalone Mode Selection, AMP11

Parameter I2C Device Address J24, J25 J35 J36

I2C Mode 0x34 Installed GND Installed

I2C Mode 0x35 Installed GND Open

I2C Mode 0x36 Installed Open Open

I2C Mode 0x37 Installed PVDD Open

Standalone Mode N/A Open PVDD Installed

1N/A means not applicable.

Table 4. I2C or Standalone Mode Selection, AMP21

Parameter I2C Device Address J22, J23 J33 J34

I2C Mode 0x34 Installed GND Installed

I2C Mode 0x35 Installed GND Open

I2C Mode 0x36 Installed Open Open

I2C Mode 0x37 Installed PVDD Open

Standalone Mode N/A Open PVDD Installed

1N/A means not applicable.

Table 5. I2S or PDM Input Selection in Standalone Mode

Mode

AMP2 J22, J23 J20 J21 J26 J19

AMP1 J24, J25 J9 J15 J27 J8

I2S Left channel Open GND GND Installed Open

Right channel Open GND IOVDD Installed Open

PDM Left channel, 3 MHz Open IOVDD GND Open GND

Right channel, 3 MHz Open IOVDD GND Open IOVDD

Left channel, 6 MHz Open IOVDD IOVDD Open GND

Right channel, 6 MHz Open IOVDD IOVDD Open IOVDD

POWERING UP THE EVAL-SSM6515Z

To power up the EVAL-SSM6515Z, connect the ribbon cable of the

USBi board to J1 (control port) of the EVAL-SSM6515Z.

POWER

Power can be supplied to the EVAL-SSM6515Z in one of three

ways: connecting the EVAL-ADUSB2EBZ (USBi) board to J11 (see

Figure 20), connecting a 3.8 V dc to 5 V dc power supply to J1

(tip positive), or using the binding posts, J2 (5 V) and J10 (GND). If

no external supply is used, the EVAL-SSM6515Z draws power from

the USBi board.

Figure 20. Header J11, Control Port

The on-board regulators generate the 1.8 V, 1.2 V, and 3.3 V dc

supplies. The JP1 and J6 jumpers are used to set the PVDD and

IOVDD supplies to the SSM6515. By default, the 1.8 V supply is

used for PVDD and IOVDD. The J5 and J18 jumpers provide the

PVDD supply to individual SSM6515 amplifiers, and the J28 and

J29 jumpers provide the IOVDD supply. By removing these jump-

ers, the currents to the individual SSM6515s can be measured.

USING I2C CONTROL MODE

Connecting the USBi to J11 provides I2C control for the SSM6515.

See Figure 20.

USING SIGMASTUDIO WITH USBI FOR I2C

CONTROL

Take the following steps to use SigmaStudio with the USBi for I2C

control and to configure the registers for I2S operation:

1. In the Hardware Configuration tab, click the IC 1 - SSM6515

v1.0.0.1 tab, then click the ChipID tab (see Figure 21). Click

Get ID to read the device ID and revision.

2. Click the Datapath tab. Click Mute Control to select DAC

Unmuted to unmute the DAC, as shown in Figure 22.

User Guide EVAL-SSM6515

SETTING UP THE EVALUATION BOARD

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3. Click the Control/Status tab. Click Software Master Power-

down to select Normal to turn on the amplifier if the I2S clocks

are provided. The amplifier outputs the audio at J38 (AMP1)

and J40 (AMP2).

Figure 21. ChipID Tab

Figure 22. Datapath Tab

User Guide EVAL-SSM6515

SETTING UP THE EVALUATION BOARD

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Figure 23. Control/Status Tab

EXTERNAL I2S INPUT, I2C MODE

If using the external I2S input, the only change needed is for J13.

Connect a digital I2S audio source to J13. The external I2S signals

must be 1.8 V p-p. Refer to Table 2 for the J13 header connections.

Figure 24. External I2S Selection

DEFAULT SWITCH AND JUMPER SETTINGS

(PDM INPUT, I2C MODE)

If using the PDM source as an input, use the same settings as

shown in Figure 19, but connect only the PDM data and clock at Pin

2 and Pin 8 of J13. Leave Pin 5 (center) unconnected. Follow Table

5 for the desired PDM mode. Then, use SigmaStudio to configure

the PDM mode for the SSM6515, as shown in Figure 22.

Turn on the PDM signals to the EVAL-SSM6515Z. The audio output

is available at J38 (AMP1) and J40 (AMP2).

User Guide EVAL-SSM6515

SETTING UP THE EVALUATION BOARD

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Figure 25. PDM Configuration

DEFAULT SWITCH AND JUMPER SETTINGS (S/

PDIF INPUT, STANDALONE MODE)

To configure the EVAL-SSM6515Z for standalone mode, refer to

Table 3 and set the desired input I2S or PDM mode using Table 5.

Configure J13 accordingly. If using the on board S/PDIF receiver

I2S input, insert the jumpers as shown in Figure 18. If using the

external I2S input, refer to Figure 24 for J13. If using the PDM

source, connect only the PDM data and PDM clock at Pin 2 and Pin

8 of J13, respectively. Leave Pin 5 (center) unconnected.