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STMPE2401!port expander PWM controller

Posted: 28 Apr 2009 ?? ?Print Version ?Bookmark and Share

Keywords:PWM controller? LED? setup STMPE2401?

STMPE2401 is the first in the family of ST port-expander logic products. The principle of a basic expander logic is to provide additional I/Os that can be used by the host processor to implement additional features such as increasing the number of control signals and mixed signal lines or controlling more number of peripherals.

In addition, STMPE2401 comes with integrated intelligence to implement advanced features like keypad scanning, PWM control and rotator dial control. These features enable the processor load to be reduced.

There is also a provision for using a single crystal clock to drive multiple STMPE2401 devices by cascading the devices and using the CLKOUT mode to drive the clock of the cascaded devices.

STMPE2401 can be widely used in mobile communications, portable media players, game consoles, mobile phones, smart phones, consumer electronics and computer peripherals.

This application note explains the setup and programming of the integrated PWM controller in STMPE2401 to do LED backlighting, brightness control and LED blinking patterns.

View the PDF document for more information.

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