Texas Instruments TAS5782M User manual

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TAS5782M Evaluation Module
User's Guide
SLAU708–March 2017
TAS5782M Evaluation Module
(1) The PPC3 User Manual is only available after requesting the PPC3 software.
(2) Power supply minimum voltage can be lower than stated depending on the version of PPCMB used. PPCMB rev. E and earlier requires
greater than 9.02 V. PPCMB rev. F and later requires greater than 4.5 V.
This user’s guide describes the operation of the TAS5782M Evaluation Module (EVM). The EVM is
connected to the PurePath™ Console Motherboard (PPCMB). The main contents of this document
include:
• Hardware descriptions and implementation
Related documents:
• TAS5782M data sheet (SLASEG8)
• PurePath Console Motherboard User’s Guide (SLOU366)
• PPC3 User Manual (1)
• PurePath Graphic Development Suite (PurePath Console)
• TAS5782M Process Flows (SLAA737)
Required equipment and accessories:
1. TAS5782MEVM
2. PurePath console motherboard
3. A USB micro type-B cable
4. Power supply unit (PSU) 9.5 – 26.4 VDC (2)
5. Speakers and cables
6. Desktop or laptop running Microsoft®Windows®7, Windows 8, or Windows 8.1
7. Audio source: This can be a DVD player with appropriate SPDIF cable or playback media from
Windows 7, Windows 8, or Windows 8.1
Contents
1 Hardware Overview.......................................................................................................... 3
2 Hardware Setup.............................................................................................................. 6
3 Software Overview........................................................................................................... 8
4 Troubleshooting ............................................................................................................ 20
5 Board Layouts, Bill of Materials, and Schematic....................................................................... 21
List of Figures
1 TAS5782MEVM.............................................................................................................. 3
2 Device Manager ............................................................................................................. 4
3 Default Format ............................................................................................................... 5
4 PPCMB and TAS5782MEVM Connection................................................................................ 6
5 PBTL Configuration.......................................................................................................... 7
6 PBTL Connection at EVM .................................................................................................. 7
7 PBTL Connection to Speaker.............................................................................................. 7
8 PPC3 Download Window................................................................................................... 8
9 PPC3 Window................................................................................................................ 9
10 Installed EVM Apps........................................................................................................ 10
11 TAS5782M Home Page................................................................................................... 11

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12 System Checks Page...................................................................................................... 12
13 Direct I2C Page, I/O Tab................................................................................................... 13
14 Direct I2C Page, Log Tab.................................................................................................. 14
15 Audio I/O Page ............................................................................................................. 15
16 Register Map Page ........................................................................................................ 16
17 End System Integration Page ............................................................................................ 17
18 Header File Generation.................................................................................................... 18
19 In-System Debugging...................................................................................................... 19
20 In-System Tuning .......................................................................................................... 20
21 TAS5782MEVM Schematic (1 of 3) ..................................................................................... 21
22 TAS5782MEVM Schematic (2 of 3) ..................................................................................... 22
23 TAS5782MEVM Schematic (3 of 3) ..................................................................................... 23
24 TAS5782MEVM Top Composite Assembly............................................................................. 24
25 TAS5782MEVM Bottom Composite Assembly......................................................................... 25
List of Tables
1 TAS5782MEVM Bill of Materials ......................................................................................... 26
Trademarks
PurePath is a trademark of Texas Instruments.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
All other trademarks are the property of their respective owners.

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1 Hardware Overview
The TAS5782MEVM showcases the latest TI digital input class-D closed loop amplifier. The TAS5782M is
an I2S or TDM input class-D amplifier with up to 96-kHz processing. The EVM is used in conjunction with
the PPCMB. The PVDD supply is provided via the TAS5782MEVM and is regulated to 5 VDC and 3.3
VDC on the PPCMB. The PPCMB provides the I2S, I2C, and 3.3 VDC to the TAS5782MEVM.
Figure 1. TAS5782MEVM
1.1 Features
• GUI control via USB port
• Stereo and mono channels with I2S input
• Processed and non-processed mono channel I2S input
• Operates in BTL or PBTL
1.2 Functions
The TAS5782MEVM is controlled by the PPCMB. The digital audio data input to the TAS5782MEVM is
sent from PPCMB and is selectable from USB audio, optical SPDIF, coaxial SPDIF, PSIA (external I2S),
and analog ADC sources.

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1.3 Detailed Operations
Upon power-on, the PPCMB uses USB audio input (default). The I2S signals LRCLK, SCLK, SDIN and
MCLK come from the TAS1020B. foobar2000 or similar non-processing media source can be used to
stream audio. The TAS1020B enumerates as the following device on a Microsoft Windows operating
system (OS): USB audio (USB-AudioEVM), Human Interface Devices, and USB Composite Device, see
Figure 2.
Figure 2. Device Manager

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USB audio output quality can be configured as shown in Figure 3. The user must select "2 channel, 16 bit,
48000 Hz (DVD Quality)".
Figure 3. Default Format

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2 Hardware Setup
Step 1. Connect the PPCMB to the TAS5782MEVM.
Step 2. Connect speakers to the TAS5782MEVM.
Step 3. Connect a PSU to the TAS5782MEVM and turn on the power. 5-V and 3.3-V LEDs (Yellow)
are illuminated. The USB Lock LED (Blue) is also illuminated. The PSU voltage range is 9.5
to 26.4 VDC.
Step 4. Plug in a USB cable from the PC to the PPCMB.
Step 5. If an optical SPDIF source is used, the blue SPDIF clock-locked LED is illuminated.
Figure 4. PPCMB and TAS5782MEVM Connection
2.1 PBTL Hardware Setup
1. The EVM and PPCMB need to be disconnected from the power supply.
2. Set J10 and J11 on the EVM to PBTL mode (right position)
3. Connect speaker terminals (J4 and J9) to the speaker in PBTL mode (See Figure 7).
4. Power up the EVM and it will now operate in PBTL mode.
NOTE: The EVM has two devices (U1 and U2), only the bottom one (U2) can operate in PBTL
mode.

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Figure 5. PBTL Configuration
Figure 6. PBTL Connection at EVM
Figure 7. PBTL Connection to Speaker
2.2 I2C Device Addresses
The default I2C addresses on the EVM are set to 0x90 for the top device (U1) and 0x92 for the bottom one
(U2).

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3 Software Overview
3.1 PurePath Console 3 (PPC3)
PurePath™ Console 3 (PPC3) is a software platform for Texas Instruments’ audio devices. Many of these
audio devices can be configured, tuned, and validated. This platform has the ability to support a number of
TI audio devices with features that make the audio tuning experience more intuitive and exciting. Request
access on http://www.ti.com/tool/PUREPATHCONSOLE.
Once approval is given, go to www.ti.com/mysecuresoftware to download the software. After login, users
will see this webpage with a similar list of software products available for download.
Figure 8. PPC3 Download Window

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Run the installation program. Also, download the PPC3 User Manual (after requesting the PPC3 software)
for further instructions. The following window is displayed when PPC3 is launched for the first time.
When the window in Figure 9 is displayed, click on “sign in” to see TAS5782 EVM application. Click on
TAS5782M box to download TAS5782M EVM App. Installation window will pop up, then click “Install”.
Figure 9. PPC3 Window

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After installation, TAS5782 EVM box will appear in “Installed EVM Apps” section, see Figure 10. Click on
TAS5782 box to launch TAS5782 App.
Figure 10. Installed EVM Apps