Tsw1200 Capture Board; Frequently Used Registers - Texas Instruments ADS5560EVM User Manual

Serial Interface Control
3.2.2 SPI Register Write Using a Script File
For situations where the same multiple registers need to be written on a frequent basis, users can easily
create a script file using a test editor containing all ADC register writes. An example Script File is located
in the \\Install Directory\Script
of writing their own script files can start by using the
When ready to write the contents of the script file to the ADC, users can press the Load Script button, and
they are prompted for the file location of their script file. The commands are sent to the ADC when the
user acknowledges the selection of the file.
3.2.3 ADS556x Frequently Used Registers
For ease of use, several buttons have been added that allow one-click register writes of commonly used
features found in Table
and data when the button is clicked. When the ADSxxxx Reset button is pressed, it issues a software
reset to the ADC, and it resets the button values to match the contents inside of the ADC. The graph
indicator plots the SPI commands written to the ADC when a button has been depressed.
Default Value
ADSxxxx Reset
2s Complement
CMOS/LVDS : DFS pin determines
Powerdown: OFF
Fine gain: 1
INT reference
LVDS current: 3.5 mA
Test mode: None
Low sampling speed: off
LF noise suppression: off
3.2.4 Using Both Serial Interface and Parallel Controls
For increased flexibility, a combination of serial interface registers and parallel pin controls (DFS, MODE)
also can be used to configure the device. For more details, see the data sheet .
3.3

TSW1200 Capture Board

The TSW1200 board can be used to analyze the performance of the EVM. The TSW1200EVM is a circuit
board that assists designers in prototyping and evaluating the performance of high-speed ADCs that
feature parallel or serialized LVDS outputs. The TSW1200 has the LVDS 100-Ω termination resistor on the
input interface for ADC outputs. For more information, see the TSW1200EVM user's guide (SLAU212).
To start the TSW1200 software, note the following points.
1. Select the ADC type to be used before capturing.
2. For test, select Single Tone FFT plot.
3. For the ADC Sampling Rate, type in the value.
4. Type in the ADC Input Frequency. Auto calculation of the input frequency depends on the FFT record
length. As soon as the number is entered, the software calculates the coherent input frequency
corresponding to that FFT length. This frequency signal must be supplied through the signal generator.
5. Select the FFT Record Length.
6. Select Capture to obtain the plot.
7. The Continuous Capture option is used if the user wants to continuously capture the FFT.
Adjust the input level signal to attain the dBFs of approximately –1.
6 ADS5560/62EVM
Files\ADS6145_LVDS_CourseGain.txt. Users who wish to take advantage
6. The software writes to the ADC both the contents of the associated address
Table 6. Frequently Used Registers
ADS6145_LVDS_CourseGain.txt
Alternate Value
Straight binary
DDR LVDS/CMOS
Powerdown on
Up to 6-dB gain
EXT reference
Multiple options
Multiple options
Low sampling speed: on
LF noise suppression: on
www.ti.com
as a template file.
SLAU260 – December 2008
Submit Documentation Feedback