Cirrus Logic CDB5464U - Manual (Page 18)

CDB5464U
18 DS847DB1
2.7.1 Integration Seconds
This field allows the user to select the length of time over which pulses will be collected after the Start
button is pressed. Because there is a time delay (2x N / OWR) from start conversion to pulse output, the
Integration Seconds field is normally set to a delay longer than the actual pulsing period.
2.7.2 Periods To Average
This field allows the user to average a number of integration periods.
2.7.3 Start Button
When the Start button is pressed, the CDB5464U will capture pulse rate data according to the values in
the Integration Seconds and Periods to Average fields. After each integration period, the Pulse Count,
Frequency, Average Freq., and Standard Deviation columns will be updated. The Average Frequency and
Standard Deviation columns will only be updated after all the integrations have been collected. The soft-
ware stops collecting data when the user presses the Stop button, or when the data collection is finished.
Due to speed limitations of the on-board microcontroller, some higher pulse rates cannot be accurately
collected.