20.2 Module Overview
The System driver provides a collection of interfaces between the user application logic, and the core device functionality (such as clocks, reset cause determination, etc.) that is required for all applications. It contains a number of sub-modules that control one specific aspect of the device:
System Core (this module)
System Clock Control (sub-module)
System Interrupt Control (sub-module)
System Pin Multiplexer Control (sub-module)