Cypress CAPSENSE EXPRESS CY3218-CAPEXP1 Quick Start Manual - Page 7
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5.13. Touch button C0 (leftmost CapSense button). Anytime the Difference variable (repre-
sented as a red, vertical bar) is higher than the Finger Threshold (represented as a dark
blue, horizontal bar, set to 100 by default), the touch registers as a Hit.
5.14. Cover the C0 button with a piece of paper and then touch the button (with the paper
between our finger and the button). Notice how the Difference Count Value changes. Add
additional pieces of paper to increase the thickness over the button. With enough sheets
of paper added, the Difference variable does not rise above the Finger Threshold, and the
button does not register a Hit.
Zero Sheets
4 Sheets
2 Sheets
Finger Threshold
16 Sheets
8 Sheets
(No Hit)
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