Freescale

Description

MPR121 OVERVIEW. The MPR121 is the second generation capacitive touch sensor controller after the initial release of the MPR03x series devices. tric potential. Both the implementation and the configuration will be described in this application note. Figure 1. Data Flow in the MPR121 . AFE AQUISITION. The MPR121 uses an I2C Serial Interface. The I2C protocol The MPR121 operates as a slave that sends and receives data through an I2C two-wire interface. MPR121 GPIO and LED Driver Function. INTRODUCTION. MPR121 is a feature rich second generation touch sensor controller after Freescales initial release of MPR121 Capacitance Sensing Filtering and Timing. INTRODUCTION. The capacitance sensing front end of the MPR121 produces data at extremely high