GPIO - General-Purpose Input/Output | GPIO gives access to the MCU pins |
Compiler abstraction layer and code utilities | Compiler abstraction layer and code utilities for 32-bit AVR |
 Preprocessor - Macro Repeat | |
 Preprocessor - Stringize | |
 Preprocessor - Token Paste | |
 Status Codes | |
Atmel part identification macros | This collection of macros identify which series and families that the various Atmel parts belong to |
 AVR UC3 parts | |
 AVR XMEGA parts | |
 megaAVR parts | |
 SAM parts | |
Global interrupt management | This is a driver for global enabling and disabling of interrupts |
 Deprecated interrupt definitions | |
CPU - PM - Power Manager | The Power Manager (PM) provides synchronous clocks to the CPU and the modules and peripherals connected to the HSB and PBx buses |
 Power Clocks Library | |
Power Manager (PM) | This is a stub on the AVR UC3 Power Manager(PM) for the sleepmgr service |
FLASHCDW - FLASH Controller Double-Word | FLASHCDW interfaces a flash block with the 32-bit internal HSB bus |
CPU - SCIF - System Control Interface | Driver for the SCIF (System Control Interface) |
Clock Management | |
 DFLL Management | A Digital Frequency Locked Loop can be used to generate a highly accurate frequency from a slower-running reference clock, in much the same way as a PLL |
 Generic Clock Management | Generic clocks are configurable clocks which run outside the system clock domain |
 Oscillator Management | This group contains functions and definitions related to configuring and enabling/disabling on-chip oscillators |
 System Clock Management | See Quick Start Guide for the System Clock Management service (UC3L) |
  System Clock internals | |
Busy-Wait Delay Routines | This module provides simple loop-based delay routines for those applications requiring a brief wait during execution |
CPU - Cycle Counter | CPU Cycle Counter provides an interface to the COUNT and COMPARE registers |
Generic board support | The generic board support module includes board-specific definitions and function prototypes, such as the board initialization function |