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Microchip’s MTCH2120 turnkey touch controller offers 12 capacitive touch sensors configured via an I2C interface. Backed by Microchip’s unified ecosystem, it simplifies design and streamlines transitions from other turnkey and MCU-based touch interface implementations.
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The MTCH2120 delivers reliable touch performance, unaffected by noise or moisture. Its touch/proximity sensors can work through plastic, wood, or metal front panels. The controller’s low-power design enables button grouping, reducing scan activity and power consumption while keeping buttons fully operational.
Easy Tune technology eliminates manual threshold tuning by automatically adjusting sensitivity and filter levels based on real-time noise assessment. An MPLAB Harmony Host Code Configurator plug-in eases I2C integration with Microchip MCUs and allows direct connection without host-side protocol implementation. Design validation is facilitated through the MPLAB Data Visualizer, while built-in I2C port expander capabilities allow for the addition of three or more unused touch input pins.
In addition, access to Microchip’s touch library minimizes firmware complexity, helping to shorten design cycles. For rapid prototyping, the MTCH2120 evaluation board includes a SAM C21 host MCU for out-of-the-box integration.
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