Texas Instruments TAS5766MRMTEVM User manual

User's Guide
SLOU387–June 2014
TAS5766MRMTEVM
This user’s guide describes the operation of the TAS5766MRMTEVM. The TAS5766MRMTEVM is
connected to the PurePath™ Console Motherboard (PPCMB). For questions and support go to the E2E
forums (e2e.ti.com). The main contents of this document are:
• Hardware descriptions and implementation
• Start up procedure using PurePath Console (PPC) software with TAS5766M plug-in
Related documents:
• TAS5766M Data Sheet (SLAS965)
•PurePath Console Motherboard User’s Guide (SLOU366)
• PurePath Graphic Development Suite (PurePath Console)
Contents
1 Hardware Overview.......................................................................................................... 2
1.1 TAS5766MRMTEVM Features.................................................................................... 2
1.2 TAS5766MRMTEVM Functions................................................................................... 3
1.3 TAS5766MRMTEVM Detailed Operations ...................................................................... 3
2 TAS5766MRMTEVM Setup ................................................................................................ 4
2.1 TAS5766MRMTEVM Setup ....................................................................................... 4
2.2 Software Installation................................................................................................ 5
3 Using the PurePath Console with the TAS5766MRMTEVM Board................................................... 6
3.1 TAS5766M Main Tab............................................................................................... 6
3.2 TAS5766M Block Diagram Tab................................................................................... 7
3.3 Pop-Up Windows ................................................................................................... 8
3.4 Direct I2C Access Tab ............................................................................................ 10
3.5 Device Registers Tab............................................................................................. 10
4 Board Layouts, Bill of Materials, and Schematics...................................................................... 11
4.1 TAS5766MRMTEVM Board Layouts ........................................................................... 11
4.2 Bill of Materials .................................................................................................... 13
4.3 TAS5766MRMTEVM Schematic ................................................................................ 14
List of Figures
1 PPCMB and TAS5766MRMTEVM ........................................................................................ 2
2 Device Manager.............................................................................................................. 3
3 PPCMB and TAS5766MRMTEVM Connection.......................................................................... 4
4 Target Selection List......................................................................................................... 5
5 Add Target List............................................................................................................... 5
6 PPCMB and TAS5766MRMTEVM ........................................................................................ 6
7 TAS5766M Block Diagram ................................................................................................. 7
8 Smart Amplifier GUI Pop-Up ............................................................................................... 8
9 Biquad Block Pop-up........................................................................................................ 9
10 Direct I2C Access........................................................................................................... 10
11 Device Registers Tab...................................................................................................... 10
12 TAS5766MRMTEVM Top Composite Assembly....................................................................... 11
13 TAS5766MRMTEVM Copper Layer 2................................................................................... 11
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14 TAS5766MRMTEVM Copper Layer 3................................................................................... 11
15 TAS5766MRMT Bottom Copper ......................................................................................... 12
16 TAS5766MRMTEVM Schematic (Page 1 of 3)......................................................................... 14
17 TAS5766MRMTEVM Schematic (Page 2 of 3)......................................................................... 15
18 TAS5766MRMTEVM Schematic (Page 3 of 3)......................................................................... 16
List of Tables
1 TAS5766MRMTEVM Bill of Materials ................................................................................... 13
1 Hardware Overview
The TAS5766MRMTEVM showcases the latest TI digital input class D closed loop amplifier. The
TAS5766MRMT is an I2S or TDM input class D amplifier with PurePath Smart Amp. The EVM is used in
conjunction with the PurePath Console Motherboard (PPCMB). The PVDD supply is provided via the
TAS5766MRMTEVM 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 TAS5766MRMTEVM.
Figure 1. PPCMB and TAS5766MRMTEVM
1.1 TAS5766MRMTEVM Features
• GUI control via USB port
• Dual stereo channels or 2.1 system with I2S input or TDM
PurePath is a trademark of Texas Instruments.
Microsoft, Windows Media, Windows are registered trademarks of Microsoft Corporation.
All other trademarks are the property of their respective owners.
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1.2 TAS5766MRMTEVM Functions
The TAS5766MRMTEVM is controlled by the PPCMB. The PPCMB sends I2C commands from PPC to
the TAS5766M. Upon PPC execution and connection, the TAS5766M is put in software mode.
The digital audio data input to the TAS5766MRMTEVM is sent from PPCMB and is selectable from USB
audio, optical SPDIF, coaxial SPDIF, and analog ADC sources. When a digital audio data input is
selected, the PPC automatically sends appropriate scripts to the device in use.
1.3 TAS5766MRMTEVM Detailed Operations
Upon power-on, the PPCMB uses USB audio input (default). The I2S signals, LRCLK, SCLK, SDIN, and
MCLK, come from the TAS1020B. Microsoft®Windows Media®Player can stream audio. The TAS1020B
enumerates as the following device on the Microsoft®Windows®operating system: USB audio (USB-
AudioEVM), human interface devices and USB composite device, see Figure 2.
Figure 2. Device Manager
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2 TAS5766MRMTEVM Setup
This section describes the TAS5766MRMTEVM setup and software installation. Since PPCMB connects
to one of the device under test (DUT) EVMs, it is necessary to show the connection in this section. The
TAS5766MRMTEVM is used for this purpose.
2.1 TAS5766MRMTEVM Setup
Figure 3 shows the EVM with the parts labeled.
Figure 3. PPCMB and TAS5766MRMTEVM Connection
Hardware requirements:
• Desktop or laptop PC running either Windows XP or Windows 7
• Power supply 7–26 VDC
• Speakers and cable
• A USB micro type B cable
• Audio source: This can be a DVD player with the appropriate SPDIF cable or Windows Media Player
from Windows XP or Windows 7
Setup procedure:
• Plug in the USB cable from the PC to the PPCMB; the USB Lock LED (blue) is illuminated
• Connect the PPCMB to the TAS5766MRMTEVM
• Connect the PSU to TAS5766MRMTEVM and turn on the power. 5-V and 3.3-V LEDs are illuminated.
• If an optical SPDIF source is used, the blue SPDIF clock-locked LED is illuminated
• Disregard the orange LED indicating the energy threshold (ET) level is exceeded. Clearing the ET
value turns the orange LED off.
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2.2 Software Installation
Download the PurePath Console (PPC) GUI from the PurePath Console folder. The TI website has the
latest release of the GUI.
Execute the GUI installation program, Setup_PurePathConsole_Main_vxx_revxx.exe. Once the program
is installed, the program group and shortcut icon is created in Start →Program →Texas Instruments Inc
→PurePath Console →Choose Target. The Target Selection window is displayed; select TAS5766 -
Dual Smart Amplifier, as shown in Figure 4.
Figure 4. Target Selection List
If the device is not listed in the Target Selection list, click on Add Target and Windows Explorer displays.
Navigate to the folder containing the target .ppc files (plugins) and choose the DUT. Make sure that the
plugin has the same version and revision number as the PPC you are using.
Figure 5. Add Target List
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Figure 6. PPCMB and TAS5766MRMTEVM
The green LED on the bottom left corner of the PPC window indicates the initialization of TAS5766M is
valid.
The PPCMB is initialized with the USB audio (USB-AudioEVM) selected. Streaming audio from the USB
host is routed to the TAS5766M.
If an optical input is used, click on the OPT IN symbol on the PPC software, the I2S is then routed with
this signal. Likewise, with a COAX/SPDIF input using the COAX IN symbol. If an analog input is used,
click on the LINE IN symbol on the PPC software, the ADC (PCM3168A) is the source of I2S data.
• On the PPCMB, the USB blue LED is on, the green LEDs for 3.3 V and 5 V are on
• On the PPC, the green LED on the bottom left corner is on
3 Using the PurePath Console with the TAS5766MRMTEVM Board
The TAS5766MRMTEVM is initialized upon PurePath Console startup. Audio is streaming to the speakers
if Windows Media (or similar program) is playing and USB-AudioEVM is selected in the sound playback
properties. The following indicators show both the PPC GUI and TAS5766MRMTEVM are operating
correctly:
3.1 TAS5766M Main Tab
Figure 6 shows the DUT tab as displayed when the PPC GUI starts up. Here, you can click on the
TAS5766M icon and it directs you to the device block diagram.
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3.2 TAS5766M Block Diagram Tab
Figure 7 illustrates the TAS5766M Block Diagram tab, showing the device major blocks. Some of the
blocks are selectable. When a block is selected (double click), it shows pop-up settings for the particular
setting.
Figure 7. TAS5766M Block Diagram
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3.3 Pop-Up Windows
For TAS5766M, there are several settings that are done via I2C. The GUI facilitates these settings
seamlessly using the pop-up windows seen in Figure 8 and Figure 9.
Figure 8. Smart Amplifier GUI Pop-Up
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Figure 9. Biquad Block Pop-up
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3.4 Direct I2C Access Tab
I2C registers read and write can be performed on this tab (see Figure 10). Type in the device I2C address
and click Set. On the Direct I2C Read/Write box, enter a valid I2C register for read and type in both valid
register and data for write.
Figure 10. Direct I2C Access
3.5 Device Registers Tab
Figure 11 shows the current I2C registers values (hexadecimal and decimal) in the TAS5766.
Figure 11. Device Registers Tab
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