Cirrus Logic CRD5490 - Manual (Page 12)

CRD5490-Z
12 DS988RD1
The Connection, Graphics, and Quick Measurements tabs may be viewed with the conversions running, but the
continuous conversions should be stopped before moving to the Data Table, Calibration, or Register Write/Read
tabs.
3.3.2.1 START Button
The START button starts continuous conversions execution until the STOP button is clicked. The power
measurements are updated with present values in the CS5490 data registers after each conversion. The refresh
rate is configured by the SampleCount or CycleCount register.
3.3.2.2 Change Sample Count Button
Whether this option is available depends on the CS5490 device revision and configuration. The default low-rate
refresh rate for data is 1 second, or 4000 samples. Click the Change Sample Count button to change the
SampleCount register. Enter a larger number of samples to slow the low-rate refresh rate. It is not recommended to
reduce the SampleCount below 2000 samples.
3.3.2.3 Change Cycle Count Button
Whether this option is available depends on the CS5490 device revision and configuration. The default low-rate
refresh rate for data is 1 second, or 100 line cycles at 50Hz. The CS5490 counts the samples in a half-line cycle and
updates the SampleCount register automatically based on the CycleCount entered. Click the Change Cycle Count
button to change the CycleCount register. Enter a larger number of cycles to slow the low-rate refresh rate. It is not
recommended to reduce the CycleCount 50 cycles.
3.3.3 Graphics Tab
The Graphics tab displays the power data of the CS5490 versus low-rate samples in individual charts. To view data
in real time, click the START button on the Quick Measurements tab, which initiates conversions, and then click the
Graphics tab to bring it forward.
Figure 11. Graphics Tab