Cypress CapSense Express CY3280-MBR, Руководство пользователя

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14 CY3280-MBR CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-64772 Rev. **
Kit Features
Figure 3-1. External Capacitor Connected to J5
Connect capacitors of different values (22 pF and 33 pF). Ensure that power is toggled after placing
a new capacitor. Button BTN2 continues to work. Now connect the 68-pF capacitor; BTN2 stops
working. If the sensor is touched, no LED turns on. This is because of SmartSense, which works up
to 41 pF.
3.3 Toggle Feature
The following steps help to demonstrate the Toggle feature of CY8CMBR2044 CapSense controller
using CY3280-MBR kit. Before proceeding, power the kit in default mode using the procedure pro-
vided in the section
2.5 Power the Kit on page 11 .
3.3.1 Test CapSense Buttons with Toggle Feature Disabled
Touch a CapSense button; the respective LED turns on. When you release the finger, the LED turns
off. This is normal operation of the CapSense controller seen on all CapSense buttons.
Figure 3-2. Kit with Toggle Feature Disabled
1. Touch a button; LED turns on 2. Release the button; LED turns off