CY3280-MBR CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-64772 Rev. **
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3.
Kit Features
This section demonstrates the main features of CY8CMBR2044 CapSense controller using the
CY3280-MBR kit.
3.1
Features of CY8CMBR2044 CapSense Controller
CY8CMBR2044 has the following features:
■
SmartSense
■
Toggle
■
Flanking sensor suppression (FSS)
■
Delay off
■
ScanRate/Sleep
■
ARST
Refer the
for more details on these features.
Note
All features of the CY3280-MBR2044 CapSense controller can be enabled together. For ease
of demonstration, each feature is enabled separately in this document.
3.2
SmartSense Feature
The following steps help to demonstrate the SmartSense feature of CY8CMBR2044 CapSense
controller using CY3280-MBR kit. Before proceeding, power the kit in default mode using the
procedure provided in the section
3.2.1
Enable SmartSense Feature
CY8CMBR2044 CapSense controller is built around robust CSD capacitive sensing method and
patented SmartSense auto tuning algorithm. There is no action required to enable SmartSense
feature in CY8CMBR2044 CapSense controller. It is automatically enabled on power up.
3.2.2
Test CapSense Buttons with SmartSense Feature Enabled
Touch any CapSense button; the respective LED turns on. When the finger is released, the
respective LED turns off.
Connect the 10-pF capacitor provided with the kit to the J5 connector, the mark on the capacitor
connector facing up. This increases the parasitic capacitance of the CS2 sensor input, which is
connected to BTN2 sensor.
Press the power button to turn off the kit; press again to turn on power. Automatic self tuning is
performed only on power up and not on run time.
Touch BTN2, there is no difference in the way it works. Note that although the parasitic capacitance
of the sensor is increased, the sensor continues to work with automated tuning.
