Expert blog post Reducing Pin Usage in 8-bit Microcontrollers Using Pin Multiplexing

Today's recommended expert blog post, "Reducing Pin Usage on 8-bit Microcontrollers Using Pin Muxing," will present two examples of using general purpose input/output (GPIO) pin muxing to reduce a project's pin usage. The first example uses the Charlie Multiplexing Algorithm technique, and the second example uses timing peripherals and interrupts to quickly switch between pin input states and output states to read a key while driving an LED.