原标题：Atmel SAMA5D4物联网(IOT)网络关解决方案

　　Atmel公司的SMART SAMA5D4系列产品是高性能ARM® Cortex®-A5处理器MPU,工作频率高达528MHz,它集成了ARM NEON™ SIMD引擎以提高信号处理,多媒体和图像以及128KB L2高速缓存以提高系统性能.器件具有ARM TrustZone®以加强关键软件的安全性,几个硬件安全特性和先进的用户接口和连接外设如720p硬件视频译码器,LCD控制器,电阻触摸屏和CMOS传感器接口以及具有IEEE1588的双10/100以太网MAC,三个HS USB端口,UART,SPI和I2C等.本文介绍了SAMA5D4主要特性,框图,系统控制器框图,以及SAMA5D4 Xplained Ultra评估套件SAMA5D4-XULT主要特性,主要元件和电路图.

　　The Atmel® SMART SAMA5D4 Series is a high-performance, power-efficient ARM® Cortex®-A5 processor MPU capable of running up to 528 MHz. It integrates the ARM NEON™ SIMD engine for accelerated signal processing, multimedia and graphics as well as a 128 KB L2-Cache for high system performance. The device features the ARM TrustZone® enabling a strong security perimeter for critical software, as well as several hardware security features. The device also features advanced user interface and connectivity peripherals.

　　The SAMA5D4 features an internal multi-layer bus architecture associated with 32 DMA channels to sustain the high bandwidth required by the processor and the high-speed peripherals. The device supports DDR2/LPDDR/LPDDR2 and SLC/MLC NAND Flash memory with 24-bit ECC.

　　The comprehensive peripheral set includes a 720p hardware video decoder, an LCD controller with overlays for hardware-accelerated image composition, a resistive touch screen function, and a CMOS sensor interface. Connectivity peripherals include a dual 10/100 Ethernet MAC with IEEE1588, three HS USB ports, UARTs, SPIs and I2Cs.

　　Security features includes an “on-the-fly” encryption-decryption process from the external DDR memory, tamper detection pins, secure storage of critical data, an integrity check monitor (ICM) to detect modification of the memory contents and a secure boot. The product also includes a dedicated coprocessor for public key cryptography such as RSA and elliptic curves algorithms (ECC), as well as AES, 3DES, hashing function and TRNG. These features permit to protect the system against counterfeiting, to safeguard sensitive data, authenticate safe program or secure external data transfers.

　　The SAMA5D4 series is optimized for control panel/HMI applications needing video playback and applications that require high levels of connectivity in the industrial and consumer market. Its security features makes the SAMA5D4 well suited for secure gateways or for the IoT.

　　SAMA5D4主要特性:

　　 ARM Cortex-A5 Core

　　̶ ARMv7-A Thumb2® instruction set

　　̶ ARM TrustZone

　　̶ NEON Multimedia Architecture

　　̶ 832 MIPS @ 528 MHz in worst conditions

　　 Memory Architecture

　　̶ Memory Management Unit

　　̶ 32 Kbyte Data Cache, 32 Kbyte Instruction Cache

　　̶ 128 Kbyte L2 Cache

　　̶ One 128 Kbyte scrambled internal ROM single-cycle access at system speed, embedding Atmel boot loader/Atmel Secure boot loader

　　̶ One 128 Kbyte scrambled internal SRAM, single-cycle access at system speed

　　̶ High-bandwidth scramblable 16-bit or 32-bit Double Data Rate Multi-port Dynamic RAM Controller supporting

　　512 Mbyte 8-bank DDR2/LPDDR/LPDDR2, including partial areas “on-the-fly” AES encryption/decryption

　　̶ EBI (External Bus interface) supporting:

　　 16-bit NAND flash controller, including 24-bit error correction code (PMECC) for 8-bit NAND Flash

　　 Independent Static Memory Controller (SMC) with datapath scrambling

　　 System running up to 176 MHz in worst conditions

　　̶ Power-on Reset Cells, Reset Controller, Shutdown Controller, Periodic Interval Timer, Watchdog Timer and secure Real-time Clock

　　̶ Internal regulator

　　̶ One 600–1200 MHz PLL for the System and one PLL at 480 MHz optimized for USB High Speed

　　̶ Internal Low-power 12 MHz RC Oscillator

　　̶ Low-power 32 kHz RC Oscillator

　　̶ Selectable 32768 Hz Low-power oscillator and 12 MHz Oscillator

　　̶ Two 64-bit, 16-channel DMA Controller

　　̶ 64-bit Advanced Interrupt Controller

　　̶ 64-bit Secure Advanced Interrupt Controller

　　̶ Three Programmable External Clock Signals

　　̶ Programmable fuse box with 512 fuse bits available for customer, including JTAG protection

　　 Peripherals

　　̶ Video Decoder (VDEC) supporting formats MPEG-4, H.264, H.263, VP8 and JPEG, and image postprocessing

　　̶ LCD TFT Controller with 4 overlays up to 2048x2048 or up to 720p in video format, with rotation and alpha blending

　　̶ ITU-R BT. 601/656 Image Sensor Interface (ISI)

　　̶ One USB Device High-Speed, Three USB Host High-Speed with On-chip Transceiver

　　̶ Two 10/100 Mbps Ethernet MAC Controllers with IEEE 1588 v2 support

　　̶ SoftModem Interface (SMD)

　　̶ Two high-speed memory card hosts (eMMC 4.3 and SD 2.0)

　　̶ Three Master/Slave Serial Peripheral Interfaces (SPI)

　　̶ Five USARTs, two UARTs, one DBGU

　　̶ Two Synchronous Serial Controllers (SSC)

　　̶ Four Two-wire Interfaces up to 400 Kbits/s supporting I2C protocol and SMBUS (TWI)

　　̶ Three 3-channel 32-bit Timer/Counters (TC)

　　̶ One 4-channel 16-bit PWM Controller

　　̶ One 5-channel 10-bit Analog-to-Digital Converter with Resistive Touchscreen function

　　 Safety

　　̶ Internal and external memory integrity monitoring (Integrity Check Monitor based on SHA256)

　　̶ Power-on Reset Cells

　　̶ Main Crystal Clock Failure Detector

　　̶ Independent Watchdog

　　̶ Register Write Protection

　　̶ Memory Management Unit

　　 Security

　　̶ 512 bits of scrambled and erasable registers

　　̶ 8 Kbytes of internal scrambled RAM with non-imprinting support, 6 Kbytes are erasable

　　̶ 8 PIOBU tamper pins for static or dynamic intrusion detections (1)

　　̶ Atmel secure boot (2)

　　 Cryptography

　　̶ True Random Number Generator (TRNG)

　　̶ SHA: Supports Secure Hash Algorithm (SHA1, SHA224, SHA256, SHA384, SHA512) compliant with FIPS publications 180-2

　　̶ AES: 256-bit, 192-bit, 128-bit Key Algorithm, compliant with FIPS PUB 197 specifications

　　̶ TDES: Two-key or Three-key Algorithms, compliant with FIPS PUB 46-3 specifications

　　̶ Public Key Coprocessor (CPKCC) and associated Classical Public Key Cryptography Library (CPKCL) for RSA, DSA, ECC GF(2n), ECC GF(p) (3)

　　 Up to 152 I/Os

　　̶ Five Parallel Input/Output Controllers with slew rate control on high-speed I/Os

　　̶ Input Change Interrupt capability on each I/O Line, selectable Schmitt Trigger input

　　̶ Individually Programmable Open-drain, Pull-up and Pull-down Resistor, Synchronous Output, Filtering

　　 Packages

　　̶ 361-ball stubless BGA, 16x16 mm body, pitch 0.8 mm

　　̶ 289-ball stubless BGA, 14x14 mm body, pitch 0.8 mm

　　图1. SAMA5D4系列框图

　　图2. SAMA5D4系统控制器框图

　　SAMA5D4 Xplained Ultra评估套件SAMA5D4-XULT

　　This user guide introduces the Atmel® SAMA5D4 Xplained Ultra evaluation kit (SAMA5D4-XULT) and describes the development and debugging capabilities for applications running on the Atmel | SMART SAMA5D4 ARM® Cortex®-A5-based embedded microprocessor unit (eMPU).

　　The SAMA5D4-XULT includes:

　　 Board

　　̶ One SAMA5D4-XULT board

　　 Cables

　　̶ One Micro-AB type USB cable

　　 Welcome letter

　　图3. 评估套件SAMA5D4-XULT外形图和主要元件