Difference between revisions of "MPR121 Proximity Capacitive Touch Sensor Controller"

Revision as of 10:22, 5 June 2023

Keypad Matrix

The MPR121 is a I²C device which can be used to implement touch keys. It can also function as a GPIO extender and can be used to drive LEDs.

In order to try out the MPR121 I created a quick keypad.

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 * [https://datasheet.lcsc.com/lcsc/1811091710_NXP-Semicon-MPR121QR2_C91322.pdf Datasheet]
+* [https://www.nxp.com/docs/en/application-note/AN3944.pdf?&WT_ASSET=Documentation MPR121 Quick Start Guide]
 * [https://www.nxp.com/docs/en/application-note/AN3889.pdf MPR121 Capacitance Sensing Settings]
 * [https://www.nxp.com/docs/en/application-note/AN3890.pdf MPR121 Capacitance Sensing — Filtering and Timing]
 * [https://www.nxp.com/docs/en/application-note/AN3895.pdf MPR121 Serial Communication]
 * [https://www.nxp.com/docs/en/application-note/AN3894.pdf MPR121 GPIO and LED Driver Function]