Capacitive Touch Sensing Mixed-Signal Microcontroller
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MSP430FR2633, M...
Description
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Reference Design
MSP430FR2633, MSP430FR2632, MSP430FR2533, MSP430FR2532
SLAS942D – NOVEMBER 2015 – REVISED AUGUST 2019
MSP430FR263x, MSP430FR253x Capacitive Touch Sensing Mixed-Signal Microcontrollers
1 Device Overview
1.1 Features
1
CapTIvate™ technology – capacitive touch
– Performance
– Fast electrode scanning with four simultaneous scans
– Support for high-resolution sliders with up to 1024 points
– Proximity sensing
– Reliability
– Increased immunity to power line, RF, and other environmental noise
– Built-in spread spectrum, automatic tuning, noise filtering, and debouncing algorithms
– Enables reliable touch solutions with 10-V RMS common-mode noise, 4-kV electrical fast transients, and 15-kV electrostatic discharge, allowing for IEC‑61000-4-6, IEC‑61000-4-4, and IEC‑61000-4-2 compliance
– Reduced RF emissions to simplify electrical designs
– Support for metal touch and water rejection designs
– Flexibility
– Up to 16 self-capacitance and 64 mutualcapacitance electrodes
– Mix and match self- and mutual-capacitive electrodes in the same design
– Supports multitouch functionality
– Wide range of capacitance detection, wide electrode range of 0 to 300 pF
– Low power
– <5 µA wake-on-touch with four sensors
– Wake-on-touch state machine allows electrode scanning while CPU is asleep
– Hardware acceleration for environmental compensation, filtering, and threshold detection
– Ease of us...
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