Squeeze extra outputs from a pin-limited microcontroller

Posted on Jun 25, 2012

Many of today`s designs use low-cost microcontrollers from Freescale and Microchip, but during the last decade, device packages have resorted to ever-smaller footprints featuring as few as eight or even six pins. Although these packages minimize pc-board area, they also reduce the number of available I/O pins and pose problems for designers who need to add one more function without migrating to a device that occupies a larger package.

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