Texas Instruments TLC5940 EVM, User Manual

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1.1 Requirements
1.2 Setup
Introduction
The user enters the LED DOT correction and grayscale information into the LED Frame Designer
software. The software then communicates with the TLC5940EVM via an interface board. This interface
board, the TUSB3210GENPDK, generates the individual data signals necessary to program the
TLC5940EVM so that it properly drives the LEDs.
In order to operate this EVM, the following components must be connected and properly configured. All
components, software, and connectors are supplied in the EVM except for the host computer and the two
dc power supplies.
1.1.1 Software
Texas Instruments has provided the software necessary to evaluate this EVM. Check the TLC5940
product folder on the TI website for the latest revision of the software.
1.1.2 Host Computer (PC) Requirements
•
The host computer operating system must have either Windows XP™ or Windows 2000™ operating
system installed
•
Must have a USB port
•
Must have a minimum of 100 MB of free hard disk space for the LED Frame Designer program
installation
•
Must have a minimum of 256 MB of RAM to run the LED Frame Designer program
1.1.3 Power Supply Requirements
•
DC power source capable of supplying a minimum of 5.5 volts at 2 amps
•
DC power source capable of supplying 3.3 volts at 500 milliamps.
1.1.4 Printed Circuit Board Assembly
The TLC5940EVM-106 PCB contains three TLC5940 ICs that are configured in series.
1.1.5 TUSB3210GENPDK Interface Board
The TUSB3210GENPDK is the interface between the PC and the EVM. One end of the
TUSB3210GENPDK connects to the PC with the supplied USB cable and the other end of the
TUSB3210GENPDK connects to the EVM with the supplied SCSI-1 cable. When the user programs the
LEDs to turn on or off, the PC sends the proper commands to the TUSB3210GENPDK. The
TUSB3210GENPDK receives the USB command where its firmware converts it into the proper bit stream
necessary to control the LEDs on the EVM.
The following sections describe how to setup the EVM software and hardware.
1.2.1 Software Installation
To install the software, insert the enclosed CD. Browse the contents of the CD for the "Setup.exe" file.
Run this file to start the install process.
1.2.2 Hardware Setup
Refer to Figure 1 when setting up the TLC5940EVM hardware.
Attach the 50-pin ribbon cable between the TUSB3210 board and the TLC5940EVM board.
Ensure that the EEPROM on the TUSB3210 board is installed and properly seated.
Attach the 5.5-volt (2-A) power supply to the LED board between J5 (V_GB) and J6 (GND).
TLC5940 EVM 2 SLVU139 – September 2005