STMPE811 Datasheet | STMicroelectronics

8-bit port expander with advanced touchscreen controller Preliminary Data Features - 8 GPIOs .. - 1.8 - 3.3 V - - - - - - - - - - operating voltage Integrated 4-wire touchscreen controller Interrupt output pin Wakeup feature on each I/O SPI and I2C interface Up to 2 devices sharing the same bus in I2C mode (1 address line) 8-input 12-bit ADC 128-depth buffer touchscreen controller Touchscreen movement detection algorithm 25 k V air-gap ESD protection (system level) 4 k V HBM ESD protection (device level) QFN16 Description The STMPE811 is a GPIO (general purpose input/output) port expander able to interface a main digital ASIC via the two-line bidirectional bus (I2C). A separate GPIO expander is often used in mobile multimedia platforms to solve the problems of the limited amount of GPIOs typically available on the digital engine. The STMPE811 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, 128 x 32 bit buffer and a programmable active window feature. Applications - - - Portable media players Game consoles Mobile and smart phones Table 1. Device summary Order code STMPE811QTR Package QFN16 Packaging Tape and reel June 2008 Rev 1 1/54 .st. 54 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. Contents Contents 1 2 STMPE811 functional overview -...