Sense.T.C
Productioncapacitive touch
Built around the Azoteq IQS323 ProxFusion controller, the Sense.T.C tile's entire top surface functions as a capacitive touch sensor, while a second input channel is available via one of the pads.
The IQS323 provides both proximity and touch detection with all signal processing on-chip, exposing processed results over I2C. Each channel reports 16-bit filtered counts, a 16-bit long-term average baseline, and binary proximity/touch states with configurable thresholds, debounce, and hysteresis. When the surface and the pad 8 electrode are configured together as a slider, the controller provides a 16-bit position output with on-chip gesture recognition including tap, swipe, flick, and hold.
Report rates are configurable per power mode, from every 16ms in normal self-capacitive mode (125µA average current consumption) up to every 160 ms in the 4 µA ultra-low-power mode. In addition, event-driven reporting can leave the host free between changes in state.
Technical Summary
- Package
- T44-10
- Drawing
- Land pattern (PDF)
- Packaging
- 12mm tape and reel (drawing)
- Power
- 1.71–3.5V
- Component
- IQS323 (PDF)
- Interfaces
- I2C
Resources & Links
- Datasheet
- Download PDF
- JSON Tile Definition
- v0.8 (Sep 25, 2026)
- Drivers
- Documentation|GitHub
- Discussion
- Discord
Application Notes
Sensing Surface
The entire top surface of the tile connected to the C1 sensor input with a 470-ohm series resistor.
Secondary Input
The C0 input on the IQS323 is directly connected to pad 8 of the tile, allowing for user configuration of a secondary capacitive touch input.
Pad Assignments
| Pad | Type | Function | Note | |
|---|---|---|---|---|
| 1 | ⏻ | GND | ||
| 2 | — | |||
| 3 | D | RDY | Data-ready, open-drain, active low. On-tile 4.7 kΩ pull-up and 100 nF to GND. Also the IQS323 MCLR reset input (low outside a communication window resets the chip). | |
| 4 | D | I2C.CLK | ||
| 5 | D | I2C.DAT | ||
| 6 | — | |||
| 7 | — | |||
| 8 | A | C0 | additional external cap-touch input | |
| 9 | — | |||
| 10 | ⏻ | V+ | 1.71-3.5V |
I2C
I2C- Mode
- slave
- Max Clock
- 1MHz
- Address
- 0x44(default)
- Format
- —
| Function | Required | Pad(s) |
|---|---|---|
| I2C.CLK | No | 4 |
| I2C.DAT | No | 5 |
Development Product — This is an electronic development module intended for evaluation, prototyping, and integration into other designs by qualified engineers and developers. It is not a finished consumer product and has not been independently certified for FCC, CE, UL, or other regulatory compliance. The integrator of this module into a finished product is responsible for obtaining all necessary certifications. Not intended for use in life-support systems, safety-critical applications, or any application where failure could result in personal injury or property damage.