The AW9523 I/O expander component allows the user to configure inputs,
outputs, interrupts, etc. via a serial interface such as I2C. It also supports
dimming control for LEDs attached to the expander's port pins, when those pins
are configured into a special LED mode.
The example shows how to use the Aw9523 component to communicate
(via I2C) with an AW9523 I2C digital IO expander and LED driver.