12키 멀티채널 정전식 I2C 터치 센서 -MPR121

(Grove - 12 Key Capacitive I2C Touch Sensor V2 (MPR121))

개요

  • 본 제품은 12 키 멀티채널 정전식 I2C 터치 센서 모듈입니다.
  • 정전식 터치, 터치, 근접 센싱의 세가지 기능을 하나의 모듈에서 사용이 가능한 제품입니다.
  • MPR121 칩을 탑재하였으며, I2C 주소는 0X5Bㅇ서 0X5D까지 설정이 가능하여 동일 I2C 버스상에서 최대 36개의 터치 일렉트로드를 연결하여 사용이 가능합니다.

특징

  • Capacitance Sensing: This module uses a constant DC current capacitance sensing scheme. It can measure capacitances ranging from 10 pF to over 2000 pF with a resolution up to 0.01 pF.

    Touch Sensing: Once the electrode capacitance data is acquired, the electrode touch/release status is determined comparing it to the capacitance baseline value.

    Proximity Sensing: One new feature of the MPR121 is the near proximity sensing system. This means that all of the system's electrodes can be summed together to create a single large electrode.

  • Internal 10-bit ADC

  • Integrated independent autocalibration for each electrode input

  • Completely independent electrodes with built-in autoconfiguration

  • I2C interface, with IRQ Interrupt output to advise electrode status changes

  • Hardware configurable I2C address

  • 12 electrodes/capacitance sensing inputs in which 8 are multifunctional for LED driving and GPIO

  • Autoconfiguration of charge current and charge time for each electrode input

  • Separate touch and release trip thresholds for each electrode, providing hysteresis and electrode independence

문서

연관 제품