Technical specifications and usage details for the Goodix GT911 5‑point capacitive touch controller.
The GT911 is a 5‑point capacitive touch controller designed for 7"–8" screens, offering 26 drive channels and 14 sensing channels. It supports standard I2C communication, multiple operating modes, and includes built‑in calibration and temperature compensation.
The document provides pin definitions, sensor layout guidelines, electrical characteristics, package dimensions, and reference circuit diagrams, along with version history and contact information for Goodix. This manual is written in Chinese.
| Supply voltage (AVDD28) | 2.8‑3.3 V |
|---|---|
| I/O voltage (VDDIO) | 1.8‑3.3 V |
| Operating temperature | -40 °C to 85 °C |
| Storage temperature | -60 °C to 125 °C |
| I2C address options | 0x28/0x29 or 0xBA/0xBB |
| Maximum touch points | 5 points |
| Recommended I2C speed | ≤ 400 kbps |
The GT911 can recognize up to five touch points at the same time.
A communication speed of 400 kbps or lower is recommended.
The device operates with AVDD28 between 2.8 V and 3.3 V and VDDIO between 1.8 V and 3.3 V.
The GT911 provides two address sets: 0x28/0x29 and 0xBA/0xBB.