Datasheet

6.3 Check-Out Steps
Test Procedure www.ti.com
If not already done, connect the EVM and test equipment as shown in Figure 3 . Once the EVM USB
PORT is connected to the PC, the green LED D51 on the EVM should illuminate.
Turn on the 3.3-V power supply then turn on the 12.0-V supply. Verify all four STATUS LED’s are off.
On the host PC, launch the EVM GUI from either the Start menu item or desktop icon. The GUI start-up
screen of Figure 4 will appear. The TPS2459 EVM GUI auto-detects devices present on the I
2
C bus. The
address of the current device for all read and write transactions is displayed in the “at address:” field at the
top of the GUI screen. The address of the TPS2459EVM is selectable using the four position DIP switch,
S4, on the board.
In the GUI window, in the AMC STATUS panel, verify both the 12V PASS FET and BLK FET indicators
display an OFF status (with red background). The 12V OUT>PG Threshold indicator should also be RED.
In the AMC STATUS panel, verify the 3.3V PASS/BLK FET indicator displays an OFF status (with red
background). The VOUT GOOD indicator should also be RED. In the 12V CONTROL panel, click on the
FAULT TIME SET up arrow to maximize the displayed value at 15.5 mS. Click on the field with this value
displayed (background color turns blue). Repeat this process for the 3.3V FAULT TIME field, being sure to
click on the displayed 15.5 ms value.
Figure 4. GUI Initial Control and Status Display at Launch
10 TPS2459 Full-Featured AdvancedMC™ Slot Controller Evaluation Module SLUU349 – March 2009
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