User Manual Part 1

CY8CKIT-042-BLE Bluetooth® Low Energy (BLE) Pioneer Kit Guide, Doc. # 001-93731 Rev. *A 99
Hardware
5.1.6 CapSense Circuit
5.1.6.1 CapSense Slider
The kit has a five-segment linear capacitive touch slider, which is connected to the BLE module pins
(see Figure 5-12). The CMOD and CTANK capacitors are required for CapSense functionality and
are provided on the BLE modules (see BLE Module Board on page 106). A 2.2-nF capacitor is
present on the CMOD pin, P4[0], for CapSense operation. This kit also supports CapSense designs
that enable waterproofing. On this kit, the connection of the shield to the pin or to ground is made by
resistors R12 and R13, respectively. By default, R13 is mounted on the board, which connects the
shield to ground. Populate R12 and remove R13 when evaluating waterproofing designs, which will
connect the shield to the designated pin, P1[6].
Figure 5-12. Schematics and Board Highlight of CapSense Slider and Shield Setting