Texas Instruments TAS5780M User manual

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TAS5780M Evaluation Module
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User's Guide
SLAU694–December 2016
TAS5780M Evaluation Module
This user’s guide describes the operation of the TAS57780M Evaluation Modules (EVM). The EVM is
connected to the PurePath™ Console Motherboard (PPCMB). The main contents of this document are:
• Hardware descriptions and implementation
• Start-up procedure using PurePath Console3 (PPC3) software with TAS5780M plug-in
Related documents:
• TAS5780M Data Sheet (SLASEG7)
• PurePath Console Motherboard User’s Guide (SLOU366)
• PurePath Graphic Development Suite (PurePath Console)
• PurePath Console 3 User Manual (SLOU408)
Required equipment and accessories:
1. TAS5780MEVM
2. PurePath Console Motherboard
3. A USB micro type-B cable
4. Power Supply Unit (PSU) 8 – 26.4 VDC
5. Speakers and cables
6. Desktop or laptop running 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

Hardware Overview www.ti.com
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1 Hardware Overview
The TAS5780MEVM showcases the latest TI digital input Class-D closed loop amplifier. The TAS5780M is
an I2S or TDM input class D amplifier with 96-kHz processing. The EVM is used in conjunction with the
PurePath Console Motherboard (PPCMB). The PVDD supply is provided via the TAS5780EVM 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
TAS5780MEVM.
Figure 1. TAS5780MEVM
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 TAS5780MEVM is controlled by the PPCMB. The PPCMB sends I2C commands from PPC3 to the
TAS5780M. Upon PPC3 execution and connection, the TAS5780M is put in software mode.
The digital audio data input to the TAS5780EVM is sent from PPCMB and is selectable from USB audio,
optical SPDIF, coaxial SPDIF, PSIA (external I2S), and analog ADC sources. When a digital audio data
input is selected, the PPC3 automatically sends appropriate scripts to the device in use.

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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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2 Hardware Setup
Step 1: Connect the PPCMB to the TAS5780MEVM.
Step 2: Connect speakers to TAS5780MEVM.
Step 3: Connect a PSU to the TAS5780MEVM and turn on the power. 5-V and 3.3-V LEDs (Yellow) are
illuminated. The USB Lock LED (Blue) is also illuminated.
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 3. PPCMB and TAS5780MEVM Connection

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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’s audio devices with features that make the audio tuning experience more intuitive and exciting. Access
can be requested 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 4. PPC3 Download Window
Run the installation program. Also download the PPC3 User Manual (SLOU408) for further instructions.
The following window is displayed when PPC3 is launched for the first time.

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When the window in Figure 5 is displayed, click on “sign in” to see TAS5780 EVM application. Click on
TAS5780M box to download TAS5780M EVM App. Installation window will pop up, then click “Install”.
Figure 5. PPC3 Window

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After installation, TAS5780 EVM box will appear in “Installed EVM Apps” section, see Figure 6. Click on
TAS5780 box to launch TAS5780 App.
Figure 6. Installed EVM Apps

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3.2 TAS5780M Home Page
When the TAS5780M EVM App is launched, the TAS5780M Home Page is shown, see Figure 7. It
displays features that are available for that EVM. When a feature is selected, then the respective page is
loaded.
If the EVM is powered on and the USB is connected to the PC, the Home Page will display “Connect”
button in the bottom left corner. If the USB is not connected, only “TAS5780M – offline” is shown.
There are six pages available in the TAS5780 EVM App: System Checks, Direct I2C, Audio I/O, Register
Map, End System Integration and Tuning and Audio Processing.
Figure 7. TAS5780M Home Page

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3.3 System Checks
The System Checks Page (See Figure 8) is used to determine whether the EVM can be configured
correctly and receive audio stream from PC via USB. These checks will complete in a few minutes if no
problem is detected. It is recommended to run the system checks before proceeding to the Turning and
Audio Processing section.
Figure 8. System Checks Page

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3.4 Direct I2C
The I/O tab in the Direct I2C has two sub sections. The Input section has the provision to enter the read or
write commands scripts. Clicking the Execute button will execute the commands written in the Input
section. The status of the execution is displayed in the Output section as shown in Figure 9.
The Checksum button on the right is used to compute the checksum value of a cfg file. Load a cfg file by
clicking the Checksum button and then the computed XOR and CRC checksum will show on the Output
section
Figure 9. Direct I2C Page, I/O Tab