The STMPE811 is a GPIO (general purpose input/output) port expander from STMicroelectronics that can interface a main digital ASIC via the two-line bidirectional bus (I2C). It offers great flexibility, as each I/O can be configured as input, output or specific functions. The device has been designed with very low quiescent current and includes a wakeup feature for each I/O, to optimize the power consumption of the device. A 4-wire touchscreen controller is built into the STMPE811. The touchscreen controller is enhanced with a movement tracking algorithm (to avoid excessive data), a 128 x 32 bit buffer and programmable active window feature. It can be widely used in portable media players, game consoles, mobile phones and smartphones, GPS and other fields.
The STMPE811 is a GPIO (general purpose input/output) port expander designed to interface a main digital ASIC via a two-line bidirectional bus. It features an integrated 4-wire touchscreen controller enhanced with a movement tracking algorithm, a 128 x 32 bit buffer, and a programmable active window feature. The device also includes an 8-input 12-bit ADC and a temperature sensor.
| Operating voltage | 1.8 - 3.3 V |
|---|---|
| GPIO count | 8 GPIOs |
| ADC resolution | 12-bit |
| Touchscreen buffer depth | 128 x 32 bit |
| Package type | QFN16 |
| ESD protection (system level) | 25 kV |
| ESD protection (device level) | 4 kV HBM |
The device is available in a QFN16 package with dimensions of 3x3x1 mm.