Four capacitive touchpads TTP224 touchpad detector IC Produces four interrupt signals Registers input even when covered by paper or thin glass Several operating modes, configured through solder jumpers 3.3V or 5V power supply selection
TouchKey click has four capacitive pads connected to a TTP224 touchpad detector IC. Capacitive buttons like these can be toggled even when placed under a layer of glass, paper or other non-isolating material. The board generates an interrupt signal for each pad: OUTA, OUTB, OUTC and OUTD (in place of default mikroBUS RST, AN, PWM and INT pins, respectively).
The TTP224 IC has several operating modes which can be configured by solding closed various jumpers. Modes include Fast or Low Power (the response time is just 100mS in Fast mode and 200mS in Low Power), Single-key or Multi-key, Direct (momentary) or Toggle buttons, etc. All the available settings are as follows:
| ||Default ||Secondary |
|LPMB ||Fast ||Low power |
|TOG ||Direct ||Toggle |
|AHLB ||High output ||Low output |
|MOT0 ||Infinite on time ||16 sec. max on time |
|OD ||CMOS active ||Open Drain |
|SM ||Multi-key ||Single-key |
Another solder jumper allows you to select 3.3V or 5V power supply (in 3.3V position by default).
Note: The picture shows the board with through-hole headers. The board now comes populated with male pin headers already soldered for your convenience. The board's user manual has yet to be updated to remove the soldering instructions.
mikroBUS Click Boards Overview Click boards plug directly into a mikroBUS socket. mikroBUS is a specially designed plug-and-play pinout standard. The sockets are found on Clicker boards, the Flip & Click Arduino/Python-compatible board, the Quail board, these mikromedia shields, the Microchip Curiosity board, and development systems from mikroElektronika (V7 systems and later).
You also can connect Click boards to many other popular platforms via these adapters:
- PC — Click USB Adapter (MIKROE-1433)
- Arduino — Arduino UNO click shield (MIKROE-1581) or Arduino Mega click shield (MIKROE-1900)
- Raspberry Pi — Pi click shield (MIKROE-1512) or Pi 2 click shield (MIKROE-1879)
- BeagleBone Black — BeagleBone click shield (MIKROE-1596) or mikroBUS Cape (MIKROE-1857)
- STM32F3 Discovery — STM32F3 Discovery Shield (MIKROE-1447)
- STM32F4 Discovery — STM32F4 Discovery Shield (MIKROE-1481)
- Stellaris LM4F120 LaunchPad / Tiva TM4C123G LaunchPad — Click BOOSTER PACK (MIKROE-1363)
- Freescale Freedom — FRDM-KL46Z click shield (MIKROE-1795) or FRDM-K64F click shield (MIKROE-1794)
In addition, it is royalty-free to add mikroBUS to your own designs. Visit the mikroBUS Category to see the full line of Click boards.
Capacitive Keypad Add-on Module Resources