STMPE811| Datasheet

STMPE811, STMPE811QTR

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STMPE811
8-bit port expander with advanced touch screen controller
Data Brief

Features

8 GPIOs 1.8-3.3V operating voltage Integrated 4-wire touch screen controller Interrupt output pin Wake-up 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 Touch screen controller buffer depth of 128 Touch screen movement detection algorithm to avoid excessive data 8kV HBM ESD protection
QFN16 TSSOP16

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 IC is often used in mobile-multimedia platforms to solve the problems of the limited amounts of GPIOs usually available on the digital engine. The STMPE811 offers great flexibility as each I/Os 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 IC. A 4-wire touch screen controller is built into the STMPE811. The touch screen controller is enhanced with movement tracking algorithm, 128depth buffer and a programmable active window feature.

Table 1. Device summary
Order code STMPE811QTR STMPE811TTR July 2007 Package QFN16 TSSOP16 Rev 1 Packaging Tape and reel Tape and reel 1/3
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