 Real-time Timer (RTT) | The Real-time Timer is built around a 32-bit counter used to count roll-over events of the programmable 16-bit prescaler, which enables counting elapsed seconds from a 32 kHz slow clock source |
| Power Management Controller (PMC) | |
| Supply Controller (SUPC) | Driver for the SUPC (Supply Controller) |
| Universal Asynchronous Receiver Transceiver (UART) | The Universal Asynchronous Receiver Transmitter features a two-pin UART that can be used for communication and trace purposes and offers an ideal medium for in-situ programming solutions |
| Universal Synchronous Asynchronous | Receiver Transmitter (USART) |
 Standard I/O (stdio) | Common standard I/O driver that implements the stdio read and write functions on AVR and SAM devices |
  Standard serial I/O (stdio) | Common standard serial I/O management driver that implements a stdio serial interface on AVR and SAM devices |
| Serial Peripheral Interface (SPI) | See Quickstart guide for SAM SPI driver |
| Watchdog Timer (WDT) | Driver for the WDT (Watchdog Timer) |
| Peripheral Parallel Input/Output (PIO) Controller | |
| Compiler abstraction layer and code utilities | Compiler abstraction layer and code utilities for AT91SAM |
| Preprocessor - Macro Repeat | |
| Preprocessor - Stringize | |
| Preprocessor - Token Paste | |
| Global interrupt management | This is a driver for global enabling and disabling of interrupts |
| Deprecated interrupt definitions | |
| 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 | |
| Power Manager (PM) | This is a stub on the SAM Power Manager Control (PMC) for the sleepmgr service |
| Sleep manager | The sleep manager is a service for ensuring that the device is not put to sleep in deeper sleep modes than the system (e.g., peripheral drivers, services or the application) allows at any given time |
| SIO2HOST - UART | This module performs serial input/output functionalities via UART |
| Clock Management | |
| 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 |
| PLL Management | This group contains functions and definitions related to configuring and enabling/disabling on-chip PLLs |
| System Clock Management | See Quick Start Guide for the System Clock Management service (SAM4S) |
| Serial Interface (Serial) | See Quick start guide for Serial Interface service |
| Universal Synchronous Asynchronous Receiver | Transmitter (USART) |
| Light Weight Mesh v2.0 | Lightweight Mesh software stack is an easy to use proprietary low power wireless mesh network protocol |
| PHY | Radio physical layer (PHY) provides functions for radio transceiver access |
| AT86RF233 PHY Layer | The AT86RF233 is a feature rich, low-power 2.4 GHz radio transceiver designed for industrial and consumer ZigBee/IEEE 802.15.4, 6LoWPAN, RF4CE and high data rate sub 1GHz ISM band applications Refer AT86RF233 Data Sheet for detailed information |
| Network layer(NWK) | Network layer (NWK) provides core stack functionality and provides two routing algorithms,1.Native routing and 2.AODV routing |
 LWMesh System Services | System services provide common functions for all layers, which are necessary for normal stack operation |
 LWMesh System Services - Security | |
| Group_trx_access | This module includes api's and defenitions required for Devices with externally plugged transceivers(Non Soc's) |
| Busy-Wait Delay Routines | This module provides simple loop-based delay routines for those applications requiring a brief wait during execution |
| Serial Peripheral Interface (SPI) | This is the common API for SPI interface |
| Common IOPORT API | See Quick start guide for the common IOPORT service |
| Group_pal_common_hw_timer | Implements a common api interface for accessing timer drivers of all architectures |
| SAM3/4S/4L/4E/4N/4CM/4C/G Timer Counter (TC) Driver | This driver for Atmel® | SMART ARM®-based microcontrollers provides an interface for the configuration and management of the device's Timer Counter functionality |
| Generic board support | The generic board support module includes board-specific definitions and function prototypes, such as the board initialization function |
| SAM4S Xplained Pro board | |
| Configuration | Symbols to use for configuring the board and its initialization |
| Features | Symbols that describe features and capabilities of the board |
| General Purpose Input/Output | This is the common API for GPIO |
1.8.5