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          您現在的位置: 首頁 > 技術方案 >消費電子 > 基于TI公司的AM437x雙照相機參考設計


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          原標題:TI AM437x雙照相機參考設計

            TI公司的高性能處理器AM437x系列MCU是基于ARM Cortex-A9核,具有增強的3D圖像加速子系統POWERVR SGX以及用于包括工業通信協議如EtherCAT, PROFIBUS?, EnDat和其它協議的實時處理的協處理器,器件支持高級操作系統(HLOS),主要用在工業自動化,POS,手持無線電,測試測量,病人監護,手持數據終端,導航設備和條碼掃描儀.本文介紹了AM437x 系列主要特性和框圖, 雙照相機參考設計和AM437x GP EVM評估模塊主要特性,系統框圖,電路圖,材料清單和PCB設計文件.

            The TI AM437x high-performance processors are based on the ARM Cortex-A9 core. The processors are enhanced with 3D graphics acceleration for rich graphical user interfaces, as well as a co-processor for deterministic, real-time processing including industrial communication protocols, such as EtherCAT, PROFIBUS?, EnDat and others. The devices support high-level operating systems (HLOS). Linux? is available free of charge from TI. Other HLOSs are available from TI’s Design Network and ecosystem partners.

            These devices offer an upgrade to systems based on lower performance ARM cores and provide updated peripherals, including memory options such as QSPI-NOR and LPDDR2.

            The processors contain the subsystems shown in and a brief description of each follows.

            The processor subsystem is based on the ARM Cortex-A9 core, and the POWERVR SGX graphics accelerator subsystem provides 3D graphics acceleration to support display and advanced user interfaces.

            The programmable real-time unit subsystem and industrial communication subsystem (PRU-ICSS) is separate from the ARM core and allows independent operation and clocking for greater efficiency and flexibility. The PRU-ICSS enables additional peripheral interfaces and real-time protocols such as EtherCAT, PROFINET, EtherNet/IP, PROFIBUS, Ethernet Powerlink, Sercos, EnDat, and others. The PRU-ICSS enables EnDat and another industrial communication protocol in parallel. Additionally, the programmable nature of the PRU-ICSS, along with their access to pins, events and all SoC resources, provides flexibility in implementing fast real-time responses, specialized data handling operations, custom peripheral interfaces, and in offloading tasks from the other processor cores of the system-on-chip (SoC).

            High-performance interconnects provide high-bandwidth data transfers for multiple initiators to the internal and external memory controllers and to on-chip peripherals. The device also offers a comprehensive clock-management scheme.

            One on-chip analog to digital converter (ADC0) can couple with the display subsystem to provide an integrated touch-screen solution. The other ADC (ADC1) can combine with the pulse width module to create a closed-loop motor control solution.

            The real-time clock (RTC) provides a clock reference on a separate power domain. The clock reference enables battery backed clock reference.

            The camera interface offers configuration for a single or dual camera parallel port.

            Cryptographic acceleration is available in every AM437x device. Secure boot can also be made available for anti-cloning and illegal software update protection. For more information about secure boot, contact your TI sales representative.

            AM437x 系列主要特性:


            Up to 1000-MHz Sitara ARM Cortex-A9 32-Bit RISC processor

            NEON SIMD Coprocessor and Vector Floating Point (VFPv3) Coprocessor

            32KB of Both L1 Instruction and Data Cache

            256KB of L2 Cache or L3 RAM

            32-Bit LPDDR2, DDR3, and DDR3L Support

            General-Purpose Memory Support (NAND, NOR, SRAM) Supporting Up to 16-bit ECC

            SGX530 Graphics Engine

            Display Subsystem

            Programmable Real-Time Unit Subsystem and Industrial Communication Subsystem (PRU-ICSS)

            Real-Time Clock (RTC)

            Up to Two USB 2.0 High-Speed OTG Ports with Integrated PHY

            10, 100, and 1000 Ethernet Switch Supporting Up to Two Ports

            Serial Interfaces:

            Two Controller Area Network (CAN) Ports

            Six UARTs, Two McASPs, Five McSPI, Three I2C Ports, One QSPI and One HDQ or 1-Wire


            Crypto Hardware Accelerators (AES, SHA, RNG, DES and 3DES)

            Secure Boot

            Two 12-Bit Successive Approximation Register (SAR) ADCs

            Up to Three 32-Bit Enhanced Capture Modules (eCAP)

            Up to Three Enhanced Quadrature Encoder Pulse Modules (eQEP)

            Up to Six Enhanced High-Resolution PWM Modules (eHRPWM)

            MPU Subsystem

            Up to 1000-MHz ARM Cortex-A9 32-Bit RISC Microprocessor

            32KB of Both L1 Instruction and Data Cache

            256KB of L2 Cache (Option to Configure as L3 RAM)

            256KB of On-Chip Boot ROM

            64KB On-Chip RAM

            Secure Control Module (SCM)

            Emulation and Debug


            Embedded Trace Buffer

            Interrupt Controller

            On-Chip Memory (Shared L3 RAM)

            256KB of General Purpose On-Chip Memory Controller (OCMC) RAM

            Accessible to All Masters

            Supports Retention for Fast Wakeup

            Up to 512KB of Total Internal RAM

            (256KB of ARM Memory Configured as L3 RAM + 256KB of OCMC RAM)

            External Memory Interfaces (EMIF)

            DDR Controllers:

            LPDDR2: 266-MHz Clock (LPDDR2-533 Data Rate)

            DDR3 and DDR3L: 400-MHz Clock (DDR-800 Data Rate)

            32-Bit Data Bus

            2GB of Total Addressable Space

            Supports One x32, Two x16, or Four x8 Memory Device Configurations

            General-Purpose Memory Controller (GPMC)

            Flexible 8- and 16-Bit Asynchronous Memory Interface with Up to Seven Chip Selects (NAND, NOR, Muxed-NOR, and SRAM)

            Uses BCH Code to Support 4-, 8-, or 16-Bit ECC

            Uses Hamming Code to Support 1-Bit ECC

            Error Locator Module (ELM)

            Used with the GPMC to Locate Addresses of Data Errors from Syndrome Polynomials Generated Using a BCH Algorithm

            Supports 4-, 8-, and 16-Bit Per 512-Byte Block Error Location Based on BCH Algorithms

            Programmable Real-Time Unit Subsystem and Industrial Communication Subsystem (PRU-ICSS)

            Supports Protocols such as EtherCAT, PROFIBUS, PROFINET, and EtherNet/IP?, EnDat 2.2, and More

            Two Programmable Real-Time Units (PRUs) Subsystems

            32-Bit Load and Store RISC Processor Capable of Running at 200 MHz

            12KB (PRU-ICSS1), 4KB (PRU-ICSS0) of Instruction RAM with Single-Error Detection (Parity)

            8KB (PRU-ICSS1), 4KB (PRU-ICSS0) of Data RAM with Single-Error Detection (Parity)

            Single-Cycle 32-Bit Multiplier with 64-Bit Accumulator

            Enhanced GPIO Module Provides Shift-In and Shift-Out Support and Parallel Latch on External Signal

            12KB (PRU-ICSS1 only) of Shared RAM with Single-Error Detection (Parity)

            Three 120-Byte Register Banks Accessible by Each PRU

            Interrupt Controller Module (INTC) for Handling System Input Events

            Local Interconnect Bus for Connecting Internal and External Masters to the Resources Inside the PRU-ICSS

            Peripherals Inside the PRU-ICSS

            One UART Port with Flow Control Pins, Supports Up to 12 Mbps

            One Enhanced Capture (eCAP) Module

            Two MII Ethernet Ports that Support Industrial Ethernet, such as EtherCAT

            One MDIO Port

            Industrial Communication is Supported by Two PRU-ICSS Subsystems

            Power Reset and Clock Management (PRCM) Module

            Controls the Entry and Exit of Deep-Sleep Modes

            Responsible for Sleep Sequencing, Power Domain Switch-Off Sequencing, Wake-Up Sequencing, and Power Domain Switch-On Sequencing


            Integrated High-Frequency Oscillator Used to Generate a Reference Clock (19.2, 24, 25, and 26 MHz) for Various System and Peripheral Clocks

            Supports Individual Clock Enable and Disable Control for Subsystems and Peripherals to Facilitate Reduced Power Consumption

            Five ADPLLs to Generate System Clocks (MPU Subsystem, DDR Interface, USB, and Peripherals (MMC and SD, UART, SPI, I2C), L3, L4, Ethernet, GFX (SGX530), and LCD Pixel Clock)


            Two Non-Switchable Power Domains (RTC and Wake-Up Logic (WAKE-UP))

            Three Switchable Power Domains (MPU Subsystem, SGX530 (GFX), Peripherals and Infrastructure (PER))

            Implements SmartReflex Class 2B for Core Voltage scaling Based On Die Temperature, Process Variation and Performance (Adaptive Voltage Scaling (AVS))

            Dynamic Voltage Frequency Scaling (DVFS)

            Real-Time Clock (RTC)

            Real-Time Date (Day, Month, Year, and Day of Week) and Time (Hours, Minutes, and Seconds) Information

            Internal 32.768-kHz Oscillator, RTC Logic, and 1.1-V Internal LDO

            Independent Power-On-Reset (RTC_PWRONRSTn) Input

            Dedicated Input Pin (RTC_WAKEUP) for External Wake Events

            Programmable Alarm Can Generate Internal Interrupts to the PRCM for Wake Up or Cortex-A9 for Event Notification

            Programmable Alarm Can Be Used with External Output (RTC_PMIC_EN) to Enable the Power Management IC to Restore Non-RTC Power Domains


            Up to Two USB 2.0 High-Speed OTG Ports with Integrated PHY

            Up to Two Industrial Gigabit Ethernet MACs (10, 100, and 1000 Mbps)

            Integrated Switch

            Each MAC Supports MII, RMII, and RGMII and MDIO Interfaces

            Ethernet MACs and Switch Can Operate Independent of Other Functions

            IEEE 1588v2 Precision Time Protocol (PTP)

            Up to Two Controller-Area Network (CAN) Ports

            Supports CAN Version 2 Parts A and B

            Up to Two Multichannel Audio Serial Ports (McASP)

            Transmit and Receive Clocks Up to 50 MHz

            Up to Four Serial Data Pins Per McASP Port with Independent TX and RX Clocks

            Supports Time Division Multiplexing (TDM), Inter-IC Sound (I2S), and Similar Formats

            Supports Digital Audio Interface Transmission (SPDIF, IEC60958-1, and AES-3 Formats)

            FIFO Buffers for Transmit and Receive (256 Bytes)

            Up to Six UARTs

            All UARTs Support IrDA and CIR Modes

            All UARTs Support RTS and CTS Flow Control

            UART1 Supports Full Modem Control

            Up to Five Master and Slave McSPI Serial Interfaces

            McSPI0-McSPI2 Supports Up to Four Chip Selects

            McSPI3-McSPI4 Supports Up to Two Chip Selects

            Up to 48 MHz

            One Quad-SPI

            Supports eXecute In Place (XIP) from Serial NOR FLASH

            One Dallas 1-Wire? and HDQ Serial Interface

            Up to Three MMC, SD, and SDIO Ports

            1-, 4-, and 8-Bit MMC, SD, and SDIO Modes

            1.8- or 3.3-V Operation on All Ports

            Up to 48-MHz Clock

            Supports Card Detect and Write Protect

            Complies with MMC4.3 and SD and SDIO 2.0 Specifications

            Up to Three I2C Master and Slave Interfaces

            Standard Mode (Up to 100 kHz)

            Fast Mode (Up to 400 kHz)

            Up to Six Banks of General-Purpose I/O (GPIO)

            32 GPIOs per Bank (Multiplexed with Other Functional Pins)

            GPIOs Can be Used as Interrupt Inputs (Up to Two Interrupt Inputs per Bank)

            Up to Three External DMA Event Inputs That Can Also be Used as Interrupt Inputs

            Twelve 32-Bit General-Purpose Timers

            DMTIMER1 is a 1-ms Timer Used for Operating System (OS) Ticks

            DMTIMER4–DMTIMER7 are Pinned Out

            One Public Watchdog Timer

            One Free Running High Resolution 32-kHz Counter (synctimer32K)

            SGX530 3D Graphics Engine

            Tile-Based Architecture Delivering Up to 20M Poly/sec

            Universal Scalable Shader Engine is a Multi-Threaded Engine Incorporating Pixel and Vertex Shader Functionality

            Advanced Shader Feature Set in Excess of Microsoft VS3.0, PS3.0, and OGL2.0

            Industry Standard API Support of Direct3D Mobile, OGL-ES 1.1 and 2.0, and OpenVG 1.0

            Fine-Grained Task Switching, Load Balancing, and Power Management

            Advanced Geometry DMA-Driven Operation for Minimum CPU Interaction

            Programmable High-Quality Image Anti-Aliasing

            Fully Virtualized Memory Addressing for OS Operation in a Unified Memory Architecture

            Display Subsystem

            Display Modes

            Programmable Pixel Memory Formats (Palletized: 1-, 2-, 4-, and 8-Bit Per Pixel; RGB 16- and 24-Bit Per Pixel; and YUV 4:2:2)

            256 x 24-Bit Entries Palette in RGB

            Up to 2048 x 2048 Resolution

            Display Support

            Four Types of Displays Are Supported: Passive and Active Colors; Passive and Active Monochromes

            4- and 8-Bit Monochrome Passive Panel Interface Support (15 Grayscale Levels Supported Using Dithering Block)

            RGB 8-Bit Color Passive Panel Interface Support (3,375 Colors Supported for Color Panel Using Dithering Block)

            RGB 12-, 16-, 18-, and 24-Bit Active Panel Interface Support (Replicated or Dithered Encoded Pixel Values)

            Remote Frame Buffer (Embedded in the LCD Panel) Support through the RFBI Module

            Partial Refresh of the Remote Frame Buffer through the RFBI Module

            Partial Display

            Multiple Cycles Output Format on 8-, 9-, 12-, and 16-Bit Interface (TDM)

            Signal Processing

            Overlay and Windowing Support for One Graphics Layer (RGB or CLUT) and Two Video Layers (YUV 4:2:2, RGB16, and RGB24)

            RGB 24-bit Support on the Display Interface, Optionally Dithered to RGB 18-Bit Pixel Output Plus 6-Bit Frame Rate Control (Spatial and Temporal)

            Transparency Color Key (Source and Destination)

            Synchronized Buffer Update

            Gamma Curve Support

            Multiple-Buffer Support

            Cropping Support

            Color Phase Rotation

            Two 12-Bit Successive Approximation Register (SAR) ADCs (ADC0, ADC1)

            867K Samples Per Second

            Input Can Be Selected from Any of the Eight Analog Inputs Multiplexed Through an 8:1 Analog Switch

            ADC0 Can Be Configured to Operate as a 4-, 5-, or 8-Wire Resistive Touch Screen Controller (TSC)

            Up to Three 32-Bit Enhanced Capture Modules (eCAP)

            Configurable as Three Capture Inputs or Three Auxiliary PWM Outputs

            Up to Six Enhanced High-Resolution PWM Modules (eHRPWM)

            Dedicated 16-Bit Time-Base Counter with Time and Frequency Controls

            Configurable as Six Single-Ended, Six Dual-Edge Symmetric, or Three Dual-Edge Asymmetric Outputs

            Up to Three 32-Bit Enhanced Quadrature Encoder Pulse (eQEP) Modules

            Device Identification

            Factory Programmable Electrical Fuse Farm (FuseFarm)

            Production ID

            Device Part Number (Unique JTAG ID)

            Device Revision (Readable by Host ARM)

            Feature Identification

            Debug Interface Support

            JTAG and cJTAG for ARM (Cortex-A9 and PRCM) and PRU-ICSS Debug

            Supports Real-Time Trace Pins (for Cortex-A9)

            64KB Embedded Trace Buffer (ETB)

            Supports Device Boundary Scan

            Supports IEEE 1500


            On-Chip Enhanced DMA Controller (EDMA) Has Three Third-Party Transfer Controllers (TPTC) and One Third-Party Channel Controller (TPCC), Which Supports Up to 64 Programmable Logical Channels and Eight QDMA Channels

            EDMA is Used for:

            Transfers to and from On-Chip Memories

            Transfers to and from External Storage (EMIF, General-Purpose Memory Controller, and Slave Peripherals)

            Inter-Processor Communication (IPC)

            Integrates Hardware-Based Mailbox for IPC and Spinlock for Process Synchronization Between the Cortex-A9, PRCM, and PRU-ICSS

            Boot Modes

            Boot Mode is Selected via Boot Configuration Pins Latched on the Rising Edge of the PWRONRSTn Reset Input Pin


            Dual Port 8- and 10-Bit BT656 Interface

            Dual Port 8- and 10-Bit Including External Syncs

            Single Port 12-Bit

            YUV422/RGB422 and BT656 Input Format

            RAW Format

            Pixel Clock Rate Up to 75 MHz


            491-pin BGA Package (17x17 mm) (ZDN Suffix), 0.65-mm Ball Pitch with Via Channel Array Technology to Enable Low-Cost Routing


            Patient Monitoring

            Navigation Equipment

            Industrial Automation

            Portable Data Terminals

            Bar Code Scanners

            Point of Service

            Portable Mobile Radio

            Test and Measurement

            圖1. AM437x功能框圖


            Developers looking for camera support on the Sitara AM437x processors can use this reference design to jump start their development. The AM437x camera interface is a parallel port that can be configured as a single or dual camera interface. The dual camera configuration enables the use of two simultaneous camera inputs.

            The AM437x GP EVM is a standalone test, development, and evaluation module system that enables developers to write software and develop hardware around an AM437x processor subsystem. The main elements of the AM437x subsystem are already available on the base board of the EVM, which gives developers the basic resources needed for most general purpose type projects that encompass the AM437x as the main processor. Furthermore, additional, "typical-type" peripherals are built into the EVM, such as memory, sensors, LCD, Ethernet physical layer (PHY), and so on, so that prospective systems can be modeled quickly without significant additional hardware resources.

            AM437x GP EVM評估模塊主要特性:

            Two simultaneous 2-Megapixel SOC Cameras

            Cameras connected to the integrated Camera Interface (VPFE) of the Sitara AM437x processor

            Dual Port 8-bit interface with BT656 or external synch signals

            YUV422/RGB422, BT656, and RAW interface formats

            Complete sub-system reference with schematics, BOM, design files, and HW User’s Guide implemented on a fully assembled board developed for testing and validation.

            圖2. AM437x GP EVM評估模塊外形圖










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