Graphical User Interface
2.4
Indicator Description
There are five LED indicators on the chassis next to the standby switch. The LED farthest away from the
standby switch is for the 3.3 Vdc supply. The 3.3 V supply is needed for the LEDs and the standby circuit.
The other four LEDs indicate the four non-I
2
C output pins: FAULT , CLIP_OTW, STANDBY, and MUTE.
The FAULT and CLIP_OTW signals are also routed to the 6-pin DIN for the GUI. In normal play mode,
these four LEDs should not light.
3
Graphical User Interface
3.1
Introduction
The TAS5414B/TAS5424B GUI software is designed to demonstrate the features of the TAS5414B and
TAS5424B. It is also able to assist the applications programmer in generating and saving the desired
operating characteristics.
The TAS5414B/TAS5424B GUI has a feature by which it can log the I
2
C data being sent to the device.
This can be helpful to the programmer in understanding the I
2
C commands needed for proper function.
3.2
Software Installation
The GUI software is available on the CDrom provided with the EVM. Run the setup.exe program on a
personal computer (PC) with the Windows OS to install the GUI.
The software is currently supported up to Windows XP and is not supported by Windows 7.
The PC may need to connect to the internet to download the Microsoft .Net 2.0 environment, if it is not
already on the PC.
3.3
Hardware Installation
In the EVM package is a small PCB labeled USB2IIC2 on the PCB. This is the USB-to-I
2
C converter to
communicate from the PC to the EVM. Connect the USB cable to the PC and the PCB. Connect the 6-pin
cable to the connector labeled I
2
C on the converter PCB to the 6-pin connector on the EVM. The USB
connection provides power for this card. The PC should automatically connect to the USB-connected
PCB. See
, EVM to I
2
C Device Connections, for more details.
3.4
Using the GUI
3.4.1
The Main Window
3.4.1.1
TAS5414 Control Panel
The control panel consists of six buttons that perform basic functions on all four channels.
Reset: This button sends a software reset to the device via I
2
C. It is equivalent to sending 0x9F to register
0x0C. All the I
2
C defaults are restored.
Read Faults: This button reads the two fault registers 0x00 and 0x01 and reports the data to the Device
Status Panel
Load Diag: This button runs a script to perform the built-in load diagnostics and reports any faults to the
Device Status Panel. The details are displayed for each channel.
Play All: This button uses I
2
C to write 0x00 to register 0x0C which places all four channels into play
mode.
Mute All: This button uses I
2
C to set all channels to mute mode by writing 0x10 to register 0x0C. All
channels switch at 50% duty cycle, and no signal will pass from the input to the output.
Hi-Z All: This button places all four channel outputs into a high-impedance state by writing 0x1F to
register 0x0C. The device is first placed in mute. The Low-Low state is then invoked. Lastly, the outputs
are placed in Hi-Z.
9
SLOU335 – May 2012
TAS5414B and TAS5424B Evaluation Module (EVM) User's Guide
Copyright © 2012, Texas Instruments Incorporated