CDB5461 Datasheet, PDF (14/27 Pages) Cirrus Logic – Evaluation Board and Software

CDB5461
a known state. It does not reset any of the reg-
isters in the part.
2.6.4 Standby / Sleep Mode Buttons
When these buttons are pressed, the part will
enter either Standby or Sleep power saving
modes. To return to normal mode, use the
Power Up button.
2.6.5 Power Up Button
This button is used to send the Power Up/Halt
command to the CS5461. The part will return
to normal operating mode and halt any conver-
sions that are being done at this time.
2.7 Viewing Pulse Rate Output Data
The CS5461 features a pulse-rate energy out-
put. The CDB5461 has the capability to dem-
onstrate the functionality of this output in the
Pulse Rate Output Window (Figure 5). The
Pulse Rate Output Window can be accessed
by pressing the F4 key, or by pulling down the
Menu option, and selecting Pulse Rate Win-
dow.
2.7.1 Integration Period Box
This box allows the user to select the length of
time which pulses will be collected over.
2.7.2 Periods To Average Box
This box allows the user to average a number
of integration periods together.
2.7.3 Start Button
When the Start button is pressed, the
CDB5461 will capture pulse rate data accord-
ing to the values in the Integration Period and
Periods to Average boxes. After each integra-
tion period, the Pulse Count and Frequency
columns will be updated. The Average Freq.
and Standard Deviation columns will only be
updated after all of the integrations have been
collected. The software 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 microcontrol-
ler, some higher pulse rates cannot be accu-
rately collected. If the pulse rate is too high, a
warning message will appear.
Figure 5. Pulse Rate Output Window
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