Description
The AT32UC3A3 is a complete System-On-Chip microcontroller based on the AVR32 UC RISC processor running at frequencies up to 66MHz. 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.

FEATUREs
• High Performance, Low Power AVR®32 UC 32-Bit Microcontroller
    – Compact Single-Cycle RISC Instruction Set Including DSP Instruction Set
    – Read-Modify-Write Instructions and Atomic Bit Manipulation
    – Performing 1.49DMIPS/MHz
        • Up to 91DMIPS Running at 66MHz from Flash (1 Wait-State)
        • Up to 54 DMIPS Running at 36MHz from Flash (0 Wait-State)
    – Memory Protection Unit
• Multi-Layer Bus System
    – High-Performance Data Transfers on Separate Buses for Increased Performance
    – 8 Peripheral DMA Channels (PDCA) Improves Speed for Peripheral Communication
    – 4 generic DMA Channels for High Bandwidth Data Paths
• Internal High-Speed Flash
    – 256KBytes, 128KBytes, 64KBytes versions
    – Single-Cycle Flash Access up to 36MHz
    – Prefetch Buffer Optimizing Instruction Execution at Maximum Speed
    – 4 ms Page Programming Time and 8ms Full-Chip Erase Time
    – 100,000 Write Cycles, 15-year Data Retention Capability
    – Flash Security Locks and User Defined Configuration Area
• Internal High-Speed SRAM
    – 64KBytes Single-Cycle Access at Full Speed, Connected to CPU Local Bus
    – 64KBytes on the Multi-Layer Bus System
• Interrupt Controller
    – Autovectored Low Latency Interrupt Service with Programmable Priority
• System Functions
    – Power and Clock Manager Including Internal RC Clock and One 32KHz Oscillator
    – Two Multipurpose Oscillators and Two Phase-Lock-Loop (PLL),
    – Watchdog Timer, Real-Time Clock Timer
• External Memories
    – Support SDRAM, SRAM, NandFlash (1-bit and 4-bit ECC), Compact Flash
    – Up to 66 MHz
• External Storage device support
    – MultiMediaCard (MMC), Secure-Digital (SD), SDIO V1.1
    – CE-ATA, FastSD, SmartMedia, Compact Flash
    – Memory Stick: Standard Format V1.40, PRO Format V1.00, Micro
    – IDE Interface
• One Advanced Encryption System (AES) for AT32UC3A3256S, AT32UC3A3128S and AT32UC3A364S
    – 256-, 192-, 128-bit Key Algorithm, Compliant with FIPS PUB 197 Specifications
    – Buffer Encryption/Decryption Capabilities
• Universal Serial Bus (USB)
    – High-Speed USB (480Mbit/s) Device/MiniHost with On-The-Go (OTG)
    – Flexible End-Point Configuration and Management with Dedicated DMA Channels
    – On-Chip Transceivers Including Pull-Ups
• One 8-channel 10-bit Analog-To-Digital Converter, multiplexed with Digital IOs.
• Two Three-Channel 16-bit Timer/Counter (TC)
• Four Universal Snchronous/Asynchronous Receiver/Transmitters (USART)
    – Independent Baudrate Generator, Support for SPI, IrDA and ISO7816 interfaces
    – Support for Hardware Handshaking, RS485 Interfaces and Modem Line
• Two Master/Slave Serial Peripheral Interfaces (SPI) with Chip Select Signals
• One Synchronous Serial Protocol Controller
    – Supports I2S and Generic Frame-Based Protocols
• Two Master/Slave Two-Wire Interface (TWI), 400kbit/s I2C-compatible
• On-Chip Debug System (JTAG interface)
    – Nexus Class 2+, Runtime Control, Non-Intrusive Data and Program Trace
• 110 General Purpose Input/Output (GPIOs)
    – Standard or High Speed mode
    – Toggle capability: up to 66MHz
• 144-pin TBGA and LQFP
• Single 3.3V Power Supply