Description
Atmel's SAM4L series is a member of a family of Flash microcontrollers based on the high per formance 32-bit ARM Cortex-M4 RISC processor running at frequencies up to 48MHz.
The processor implements a Memory Protection Unit (MPU) and a fast and flexible interrupt controller for supporting modern and real-time operating systems.

FEATUREs
• Core
   – ARM® CortexTM-M4 running at up to 48MHz
   – Memory Protection Unit (MPU)
   – Thumb®-2 instruction set
• picoPower® Technology for Ultra-low Power Consumption
   – Active mode downto 90µA/MHz with configurable voltage scaling
   – High performance and efficiency: 28 coremark/mA
   – Wait mode downto 3µA with fast wake-up time (<1.5µs) supporting SleepWalking
   – Full RAM and Logic Retention mode downto 1.5µA with fast wake-up time (<1.5µs)
   – Ultra low power Backup mode with/without RTC downto 1,5/0.9µA
• Memories
   – From 128 to 512Kbytes embedded Flash, 64-bit wide access,
• 0 wait-state capability up to 24MHz
   – up to 64Kbytes embedded SRAM
• System Functions
   – Embedded voltage linear and switching regulator for single supply operation
   – Two Power-on-Reset and Two Brown-out Detectors (BOD)
   – Quartz or ceramic resonator oscillators: 0.6 to 30MHz main power with Failure
      Detection and low power 32.768 kHz for RTC or device clock
   – High precision 4/8/12MHz factory trimmed internal RC oscillator
   – Slow Clock Internal RC oscillator as permanent low-power mode device clock
   – High speed 80MHz internal RC oscillator
   – Low power 32kHz internal RC oscillator
   – PLL up to 240MHz for device clock and for USB
   – Digital Frequency Locked Loop (DFLL) with wide input range
   – Up to 16 peripheral DMA (PDCA) channels
• Peripherals
   – USB 2.0 Device and Embedded Host: 12 Mbps, up to 8 bidirectional Endpoints and Multi-packet Ping-pong Mode. OnChip Transceiver
   – Liquid Crystal Display (LCD) Module with Capacity up to 40 Segments and up to 4 Common Terminals
   – One USART with ISO7816, IrDA®, RS-485, SPI, Manchester and LIN Mode
   – Three USART with SPI Mode
   – One PicoUART for extended UART wake-up capabilities in all sleep modes
   – Windowed Watchdog Timer (WDT)
   – Asynchronous Timer (AST) with Real-time Clock Capability, Counter or Calendar Mode Supported
   – Frequency Meter (FREQM) for Accurate Measuring of Clock Frequency
   – Six 16-bit Timer/Counter (TC) Channels with capture, waveform, compare and PWM mode
   – One Master/Slave Serial Peripheral Interface (SPI) with Chip Select Signals
   – Four Master and Two Slave Two-wire Interfaces (TWI), up to 3.4Mbit/s I2C-compatible
   – One Advanced Encryption System (AES) with 128-bit key length
   – One 16-channel ADC 300Ksps (ADC) with up to 12 Bits Resolution
   – One DAC 500Ksps (DACC) with up to 10 Bits Resolution
   – Four Analog Comparators (ACIFC) with Optional Window Detection
   – Capacitive Touch Module (CATB) supporting up to 32 buttons
   – Audio Bitstream DAC (ABDACB) Suitable for Stereo Audio
   – Inter-IC Sound (IISC) Controller, Compliant with Inter-IC Sound (I2S) Specification
   – Peripheral Event System for Direct Peripheral to Peripheral Communication
   – 32-bit Cyclic Redundancy Check Calculation Unit (CRCCU)
   – Random generator (TRNG)
   – Parallel Capture Module (PARC)
   – Glue Logic Controller (GLOC)
• I/O
   – Up to 75 I/O lines with external interrupt capability (edge or level sensitivity), debouncing, glitch filtering and slew-rate control
   – Up to Six High-drive I/O Pins
• Single 1.68-3.6V Power Supply
• Packages
   – 100-lead LQFP, 14 x 14 mm, pitch 0.5 mm/100-ball VFBGA, 7x7 mm, pitch 0.65 mm
   – 64-lead LQFP, 10 x 10 mm, pitch 0.5 mm/64-pad QFN 9x9 mm, pitch 0.5 mm
   – 64-ball WLCSP, 4,314x4,434 mm, pitch 0.5 mm for SAM4LC4/2 and SAM4LS4/2 series
   – 64-ball WLCSP, 5,270x5,194 mm, pitch 0.5 mm for SAM4LC8 and SAM4LS8 series
   – 48-lead LQFP, 7 x 7 mm, pitch 0.5 mm/48-pad QFN 7x7 mm, pitch 0.5 mm