Quick Start
LUT Programming
Select “EEPROM Content” from the panel on the left of the main window. The following page will be
shown:
Figure 7.
The table in
above shows the current content of the LUT in the operating memory of the device.
This also reflects the EEPROM content after the initial power up.
The factory default for the EEPROM content is:
•
DELx (increments) = 0
•
BASEx = 0x800 (midscale)
•
X.POL = 0 (monotonically increasing function)
The content of the table can be edited by double clicking on table values and entering a new HEX number
(0 through F). In the example above all DELx entries were set to 0xF (maximum slope), and
DAC0_BASEM.POL was set for monotonically decreasing function implementation.
Click “Save File” button to save the new LUT configuration in the text file on the host PC. The file names
are the date stamps of when the file was created, and are stored in ‘C:/Program Data/Texas
Instruments/LMP92066 EVM GUI/Logs/EEPROM/’ directory
Click “Load LUT File”. A file selection window will appear, already preset to the above listed directory.
Select the file with the name corresponding to the time of save of interest. After selecting the file press
“OK”, which will both read in the file into the GUI and send the LUT data to the operating memory of
LMP92066.
At this point the new values of the LUT take effect in the signal path of LMP92066. Note that the
EEPROM has not been written with new values, yet (no Burn has been performed).
The LUT values
can be validated/tested without committing them to EEPROM, through the use of the external text file.
9
SNAU153 – MARCH 2014
LMP92066 Dual Temperature-Controlled DAC Evaluation Module
Copyright © 2014, Texas Instruments Incorporated
