멀티채널 정전식 터치 센서 -CAP1114
(CAPSENSE 2 CLICK)
개요
- 본 제품은 멀티채널 정전식 터치 센서 -CAP1114 입니다.
- CAP1114 칩을 기반으로 디자인된 제품으로 터치 입력을 I2C 인터페이스를 통해 제공합니다.
- 7-seg 슬라이더 터치, 두개의 터치 버튼, 4개의 LED 표시기를 지원합니다.
특징
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HOW DOES IT WORK?
CapSense 2 Click as its foundation uses the CAP1114, a multi-channel capacitive touch sensor from Microchip. The CAP1114 takes human body capacitance as an input and directly provides real-time sensor information via a serial interface. It also comes with programmable sensitivity for touch buttons and slider switch applications.
The CAP1114 contains multiple power states, including several low-power operating states. It has four operational states: Fully Active, Sleep, Deep Sleep, and Inactive depending on the status of the SLEEP, DEACT, and DSLEEP register bits. When the device transitions between power states, previously detected touches (for deactivated channels) are cleared, and the status bits reset.
As mentioned earlier, this board contains a 7-segment capacitive sensing slider that can detect a slide in either the UP or DOWN direction, as well as two touch buttons. These pads are the only elements on the top side of the board, allowing the protective acrylic plexiglass layer placement. Each of these features has an LED indicator representing the activity in that field. If a touch event is detected on one of these onboard pads, the state of the corresponding LED will be changed, indicating an activated channel; more precisely, touch has been detected on that specific field.
CapSense 2 Click communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings. It also possesses an additional alert interrupt signal, routed on the INT pin of the mikroBUS™ socket labeled as ALT, indicating when a specific interrupt event occurs (touch detection), and Reset pin routed to the RST pin of the mikroBUS™ socket used to hold all internal blocks of the CAP1114 in a reset state.
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Capacitive Applications Can be used for reliable and accurate sensing for any application that uses capacitive touch sensing functions On-board modules CAP1114 - multi-channel capacitive touch sensor from Microchip Key Features Slider with acceleration and position detection, programmable sensitivity, low power consumption, automatic recalibration, I2C interface, two touch buttons, LED indicators, and more Interface I2C Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V