This application note describes the enhanced serial communications interface (RSCI) module which uses Firmware Integration Technology (FIT). This module uses RSCI to provide Asynchronous, Synchronous, SPI (SSPI), and Manchester support for all channels of the RSCI peripheral.

A constant‑brightness RGB LED driver is implemented using the GreenPAK SLG46580V. Analog comparator (ACMP) feedback senses the voltage drop across each channel's current‑limiting resistor and toggles on‑chip power switches that charge the output capacitors, maintaining an average regulated LED current. The current level and channel enable are adjustable via I²C. This application note discusses resistor/capacitor selection, ripple versus start‑up trade‑offs, and bench data validating accuracy and response.