20
CY3280-MBR CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-64772 Rev. **
Kit Features
The time delay at which the LED is turned off automatically after the release of the respective button
can be controlled using the potentiometer. Note that turning the potentiometer halfway make the
LED turn off automatically within half the time of the first experiment. Refer the
for more details.
3.7
ScanRate/Sleep Feature
The following steps demonstrate the Sleep feature of CY8CMBR2044 CapSense controller using
CY3280-MBR kit. Before proceeding, power the kit in default mode using the procedure provided in
the section
.
3.7.1
Test CapSense Buttons with Sleep Feature Disabled
Touch a CapSense button; the respective LED turns on. When the finger is released, the LED turns
off immediately. This is normal operation of the CapSense controller, seen on all CapSense buttons.
Figure 3-14. Kit with Sleep Feature Disabled
3.7.2
Enable Sleep Feature
ScanRate/Sleep pin of the CapSense controller is connected to a potentiometer. This helps to
change the value of hardware strapping input connected to the pin. This potentiometer is marked as
SLEEP on the kit. The kit should be held such that 'SLEEP’ text is readable. Ensure the SW2 switch
is configured in Sleep On. Turn the Sleep potentiometer to the left, but not extreme left.
Touch the power button once to turn off the power and ensure the LED is turned off. Press the power
button again to turn on the power. This is because, the CapSense controller should be reset every
time the hardware strapping inputs change. The Sleep feature is now enabled.
Figure 3-15. Sleep Potentiometer Turned to Left
1. Touch a button; LED turns on
2. Release the button; LED turns off
