SLAU857A May   2021  – July 2021 MSP430FR2476 , MSP430FR2512 , MSP430FR2522 , MSP430FR2532 , MSP430FR2533 , MSP430FR2632 , MSP430FR2633 , MSP430FR2672 , MSP430FR2673 , MSP430FR2675 , MSP430FR2676

 

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3.1.3 Touch Panel

The CapTIvate touch panel is a two-dimensional sensor based on mutual capacitance. The detection points are formed by the intersection of rows and columns of a diamond pattern. Its basic structure is similar to matrix buttons. By interlacing the buttons, a gradual change in the signal can be detected on two adjacent buttons when the human hand moves. In Figure 3-5, the intersection of 4 RX and 4 TX forms 16 measurement nodes. A single touch panel often requires more than 8 MCU CAP I/O pins.

GUID-20210517-CA0I-8Z53-T2J3-XQPMTXGQ9D0L-low.pngFigure 3-5 Touch Panel