www.ti.com
2.5
Clock Dither Circuit
PC
USB to I2C
Adapter PCB
USB
Cable
Audio Source
TAS5424 EVM3
or
TAS5414 EVM3
6 Pin DIN Cable
4 RCA Cables
Power Supply
User supplied loads
or speakers
S
p
k
r
C
a
b
le
s
3
Graphical User Interface
3.1
Introduction
3.2
Software Installation
3.3
Hardware Installation
Graphical User Interface
The EVM includes a clock dithering circuit for EMI mitigation. The dither circuit can be disconnected from
the TAS5414 or TAS5424 device by removing the jumper JP1 on the PCB. The clock frequency changes
±
5% in 50 ms. This was chosen to avoid interference with the audio signal. This circuit can aid in resolving
potential AM interference issues.
Figure 4. EVM System Connection Diagram
The TAS5414/TAS5424 GUI software is designed to demonstrate the features of the TAS5414 and
TAS5424. It is also able to assist the applications programmer in generating and saving the desired
operating characteristics.
The TAS5414 GUI has a feature where it can log the I
2
C data being sent to and received from the device.
This can be helpful to the programmer in understanding the I
2
C commands needed for proper function.
The GUI software is located on the CD-ROM provided with the EVM. Run the setup.exe program located
in the TAS54x4 GUI directory on a personal computer (PC) with the Windows™ OS to install the GUI. The
PC should connect to the Internet as it needs to download the Microsoft dotnet 2.0 environment, if it is not
already on the PC. If needed a copy of the Microsoft dotnet 2.0 setup file is on the CD-ROM.
In the EVM package is a small PCB labeled USB2IIC2 on the PCB. This is the USB-to-I
2
C converter to
communicate to the EVM. Connect the USB cable to the PC and the PCB. Connect the 6-pin cable to the
connector labeled I2C on the converter PCB to the 6-pin connector on the EVM. Power for this card is
provide through the USB connection. The PC should automatically connect to the USB connected PCB.
TAS5414 and TAS5424 Evaluation Module
8
SLOU202 – June 2007