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STMPE2401 GPIO port expander hardware interface guide

Posted: 20 Feb 2009 ?? ?Print Version ?Bookmark and Share

Keywords:interfacing hardware? expander port? I/O port?

STMPE2401 is the first in STMicroelectronics' family of I/O port expanders. The principle of a basic I/O port expander is that it provides additional I/Os that can be used by the host processor to implement additional features such as increased number of inputs/outputs, expanding the number of control signals and mixed-signal lines, controlling a greater number of peripherals without resorting to an additional Complex Programmable Logic Device (CPLD) or upgrading the central processing unit (CPU).

In addition to these basic features, the STMPE2401 comes with integrated intelligence to implement advanced features such as keypad scanning, PWM control, rotator dial control etc.

The STMPE2401 can be widely used in the fields of mobile communications, portable media players, game console, mobile phones, smart phones, consumer electronics and computer peripherals like state-of-the-art printers, advanced embedded systems etc.

This application note deals with the setup and hardware interfacing of the device to perform various functions and the different modes for reducing power consumption.

View the PDF document for more information.

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