CY8CKIT-040 PSoC
®
4000 Pioneer Kit Guide, Doc. # 001-91316 Rev. *F
43
Hardware
4.3.1.7
CapSense Circuit
The baseboard contains a header (J5) for CapSense proximity wire connection (see
). A
2.2-nF capacitor (C1) is present on CMOD pin, P0[4], for CapSense operation. An optional resistor
R1 can be loaded to convert the current output from IDAC to a voltage output in non-CapSense
applications.
The board optionally supports CapSense designs that require waterproofing. Any pin that supports
CapSense in the device can be configured as a shield signal to enable waterproof operation. How-
ever, if a shield tank capacitor is required in the design, Capacitor C5 (CTANK) on the board needs
to be populated with the desired tank capacitor value and R30 connecting the Blue LED to P0_2
needs to be removed. Refer to the
for further details related to CapSense.
Note:
The kit does not demonstrate the waterproof feature using the Trackpad shield board that
ships with the kit because of limited I/O availability after Trackpad and RGB LED implementation.
However, a custom shield board can be designed to use the feature.
Figure 4-11. Baseboard CapSense Circuitry
Figure 4-12. Proximity Header (J5)
Содержание CY8CKIT-040 PSoC 4000 Pioneer Kit
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