Description
The Atmel® AVR® AT32UC3L0128/256 is a complete system-on-chip microcontroller based on the AVR32 UC RISC processor running at frequencies up to 50MHz. AVR32 UC is a high-performance 32-bit RISC microprocessor core, designed for cost-sensitive embedded applications, with particular emphasis on low power consumption, high code density, and high performance.
The processor implements a Memory Protection Unit (MPU) and a fast and flexible interrupt controller for supporting modern and real-time operating systems. The Secure Access Unit (SAU) is used together with the MPU to provide the required security and integrity.

FEATUREs
• High-performance, Low-power 32-bit Atmel® AVR® Microcontroller
   – Compact Single-cycle RISC Instruction Set Including DSP Instructions
   – Read-modify-write Instructions and Atomic Bit Manipulation
   – Performance
• Up to 64DMIPS Running at 50MHz from Flash (1 Flash Wait State)
• Up to 36DMIPS Running at 25MHz from Flash (0 Flash Wait State)
   – Memory Protection Unit (MPU)
• Secure Access Unit (SAU) providing User-defined Peripheral Protection
• picoPower® Technology for Ultra-low Power Consumption
• Multi-hierarchy Bus System
   – High-performance Data Transfers on Separate Buses for Increased Performance
   – 12 Peripheral DMA Channels Improve Speed for Peripheral Communication
• Internal High-speed Flash
   – 256Kbytes and 128Kbytes Versions
   – Single-cycle Access up to 25MHz
   – FlashVault Technology Allows Pre-programmed Secure Library Support for End User Applications
   – Prefetch Buffer Optimizing Instruction Execution at Maximum Speed
   – 100,000 Write Cycles, 15-year Data Retention Capability
   – Flash Security Locks and User-defined Configuration Area
• Internal High-speed SRAM, Single-cycle Access at Full Speed
   – 32Kbytes
• Interrupt Controller (INTC)
   – Autovectored Low-latency Interrupt Service with Programmable Priority
• External Interrupt Controller (EIC)
• Peripheral Event System for Direct Peripheral to Peripheral Communication
• System Functions
   – Power and Clock Manager
   – SleepWalking Power Saving Control
   – Internal System RC Oscillator (RCSYS)
   – 32 KHz Oscillator
   – Multipurpose Oscillator, Phase Locked Loop (PLL), and Digital Frequency Locked Loop (DFLL)
• 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
   – External Clock Inputs, PWM, Capture, and Various Counting Capabilities
• PWM Channels on All I/O Pins (PWMA)
   – 8-bit PWM with a Source Clock up to 150MHz
• Four Universal Synchronous/Asynchronous Receiver/Transmitters (USART)
   – Independent Baudrate Generator, Support for SPI
   – Support for Hardware Handshaking
• One Master/Slave Serial Peripheral Interface (SPI) with Chip Select Signals
   – Up to 15 SPI Slaves can be Addressed
• Two Master and Two Slave Two-wire Interfaces (TWI), 400kbit/s I2C-compatible
• One 8-channel Analog-to-digital Converter (ADC) with up to 12 Bits Resolution
   – Internal Temperature Sensor
• Eight Analog Comparators (AC) with Optional Window Detection
• Capacitive Touch (CAT) Module
   – Hardware-assisted Atmel® AVR® QTouch® and Atmel® AVR® QMatrix Touch Acquisition
   – Supports QTouch and QMatrix Capture from Capacitive Touch Sensors
• QTouch Library Support
   – Capacitive Touch Buttons, Sliders, and Wheels
   – QTouch and QMatrix Acquisition
• On-chip Non-intrusive Debug System
   – Nexus Class 2+, Runtime Control, Non-intrusive Data and Program Trace
   – aWire Single-pin Programming Trace and Debug Interface Muxed with Reset Pin
   – NanoTrace Provides Trace Capabilities through JTAG or aWire Interface
• 48-pin TQFP/QFN/TLLGA (36 GPIO Pins)
• Five High-drive I/O Pins
• Single 1.62-3.6 V Power Supply