(ACTIVE) Sitara Processor: ARM Cortex-A8, 1Gb Ethernet, Display


Functional diagram

Device Options

AM335x Cortex-A8 Based Processors


The AM335x microprocessors, based on the ARM Cortex-A8 processor, are enhanced with image, graphics processing, peripherals and industrial interface options such as EtherCAT and PROFIBUS. The devices support high-level operating systems (HLOS). Linux® and Android™ are available free of charge from TI.

The AM335x microprocessor contain the subsystems shown in Figure 1-1 and a brief description of each follows:

The microprocessor unit (MPU) subsystem is based on the ARM Cortex-A8 processor and the PowerVR SGX™ Graphics Accelerator subsystem provides 3D graphics acceleration to support display and gaming effects.

The PRU-ICSS is separate from the ARM core, allowing 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, and others. Additionally, the programmable nature of the PRU-ICSS, along with its access to pins, events and all system-on-chip (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 SoC.


  • Up to 1-GHz Sitara™ ARM® Cortex®-A8 32-Bit
    RISC Processor
    • NEON™ SIMD Coprocessor
    • 32KB of L1 Instruction and 32KB of Data Cache
      With Single-Error Detection (Parity)
    • 256KB of L2 Cache With Error Correcting Code
    • 176KB of On-Chip Boot ROM
    • 64KB of Dedicated RAM
    • Emulation and Debug - JTAG
    • Interrupt Controller (up to 128 Interrupt
  • On-Chip Memory (Shared L3 RAM)
    • 64KB of General-Purpose On-Chip Memory
      Controller (OCMC) RAM
    • Accessible to All Masters
    • Supports Retention for Fast Wakeup
  • External Memory Interfaces (EMIF)
    • mDDR(LPDDR), DDR2, DDR3, DDR3L
      • mDDR: 200-MHz Clock (400-MHz Data
      • DDR2: 266-MHz Clock (532-MHz Data Rate)
      • DDR3: 400-MHz Clock (800-MHz Data Rate)
      • DDR3L: 400-MHz Clock (800-MHz Data
      • 16-Bit Data Bus
      • 1GB of Total Addressable Space
      • Supports One x16 or Two x8 Memory Device
    • General-Purpose Memory Controller (GPMC)
      • Flexible 8-Bit and 16-Bit Asynchronous
        Memory Interface With up to Seven Chip
        Selects (NAND, NOR, Muxed-NOR, SRAM)
      • Uses BCH Code to Support 4-, 8-, or 16-Bit
      • Uses Hamming Code to Support 1-Bit ECC
    • Error Locator Module (ELM)
      • Used in Conjunction 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
  • Programmable Real-Time Unit Subsystem and
    Industrial Communication Subsystem (PRU-ICSS)
    • Supports Protocols such as EtherCAT®,
      PROFIBUS, PROFINET, EtherNet/IP™, and
    • Two Programmable Real-Time Units (PRUs)
      • 32-Bit Load/Store RISC Processor Capable
        of Running at 200 MHz
      • 8KB of Instruction RAM With Single-Error
        Detection (Parity)
      • 8KB of Data RAM With Single-Error
        Detection (Parity)
      • Single-Cycle 32-Bit Multiplier With 64-Bit
      • Enhanced GPIO Module Provides Shift-
        In/Out Support and Parallel Latch on
        External Signal
    • 12KB of Shared RAM With Single-Error
      Detection (Parity)
    • Three 120-Byte Register Banks Accessible by
      Each PRU
    • Interrupt Controller (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
  • Power, Reset, and Clock Management (PRCM)
    • Controls the Entry and Exit of Stand-By and
      Deep-Sleep Modes
    • Responsible for Sleep Sequencing, Power
      Domain Switch-Off Sequencing, Wake-Up
      Sequencing, and Power Domain Switch-On
    • Clocks
      • Integrated 15- to 35-MHz High-Frequency
        Oscillator Used to Generate a Reference
        Clock for Various System and Peripheral
      • Supports Individual Clock Enable and
        Disable Control for Subsystems and
        Peripherals to Facilitate Reduced Power
      • Five ADPLLs to Generate System Clocks
        (MPU Subsystem, DDR Interface, USB and
        Peripherals [MMC and SD, UART, SPI, I2C],
        L3, L4, Ethernet, GFX [SGX530], LCD Pixel
    • Power
      • Two Nonswitchable Power Domains (Real-
        Time Clock [RTC], Wake-Up Logic
      • Three Switchable Power Domains (MPU
        Subsystem [MPU], 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
      • Dynamic Voltage Frequency Scaling (DVFS)
  • Real-Time Clock (RTC)
    • Real-Time Date (Day-Month-Year-Day of Week)
      and Time (Hours-Minutes-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 (EXT_WAKEUP) for
      External Wake Events
    • Programmable Alarm Can be Used to Generate
      Internal Interrupts to the PRCM (for Wakeup) or
      Cortex-A8 (for Event Notification)
    • Programmable Alarm Can be Used With
      External Output (PMIC_POWER_EN) to Enable
      the Power Management IC to Restore Non-RTC
      Power Domains
  • Peripherals
    • Up to Two USB 2.0 High-Speed OTG Ports
      With Integrated PHY
    • Up to Two Industrial Gigabit Ethernet MACs (10,
      100, 1000 Mbps)
      • Integrated Switch
      • Each MAC Supports MII, RMII, 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
      • 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
    • Up to Six UARTs
      • All UARTs Support IrDA and CIR Modes
      • All UARTs Support RTS and CTS Flow
      • UART1 Supports Full Modem Control
    • Up to Two Master and Slave McSPI Serial
      • Up to Two Chip Selects
      • Up to 48 MHz
    • Up to Three MMC, SD, SDIO Ports
      • 1-, 4- and 8-Bit MMC, SD, SDIO Modes
      • MMCSD0 has Dedicated Power Rail for
        1.8-V or 3.3-V Operation
      • Up to 48-MHz Data Transfer Rate
      • Supports Card Detect and Write Protect
      • Complies With MMC4.3, SD, SDIO 2.0
    • Up to Three I2C Master and Slave Interfaces
      • Standard Mode (up to 100 kHz)
      • Fast Mode (up to 400 kHz)
    • Up to Four Banks of General-Purpose I/O
      (GPIO) Pins
      • 32 GPIO Pins per Bank (Multiplexed With
        Other Functional Pins)
      • GPIO Pins 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
    • Eight 32-Bit General-Purpose Timers
      • DMTIMER1 is a 1-ms Timer Used for
        Operating System (OS) Ticks
      • DMTIMER4–DMTIMER7 are Pinned Out
    • One Watchdog Timer
    • SGX530 3D Graphics Engine
      • Tile-Based Architecture Delivering up to 20
        Million Polygons per Second
      • Universal Scalable Shader Engine (USSE) is
        a Multithreaded 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, OpenVG 1.0,
        and OpenMax
      • Fine-Grained Task Switching, Load
        Balancing, and Power Management
      • Advanced Geometry DMA-Driven Operation
        for Minimum CPU Interaction
      • Programmable High-Quality Image Anti-
      • Fully Virtualized Memory Addressing for OS
        Operation in a Unified Memory Architecture
    • LCD Controller
      • Up to 24-Bit Data Output; 8 Bits per Pixel
      • Resolution up to 2048 × 2048 (With Maximum 126-MHz Pixel Clock)
      • Integrated LCD Interface Display Driver
        (LIDD) Controller
      • Integrated Raster Controller
      • Integrated DMA Engine to Pull Data from the
        External Frame Buffer Without Burdening the
        Processor via Interrupts or a Firmware Timer
      • 512-Word Deep Internal FIFO
      • Supported Display Types:
        • Character Displays - Uses LIDD
          Controller to Program these Displays
        • Passive Matrix LCD Displays - Uses LCD
          Raster Display Controller to Provide
          Timing and Data for Constant Graphics
          Refresh to a Passive Display
        • Active Matrix LCD Displays - Uses
          External Frame Buffer Space and the
          Internal DMA Engine to Drive Streaming
          Data to the Panel
    • 12-Bit Successive Approximation Register
      (SAR) ADC
      • 200K Samples per Second
      • Input can be Selected from any of the Eight
        Analog Inputs Multiplexed Through an 8:1
        Analog Switch
      • Can be Configured to Operate as a 4-Wire,
        5-Wire, or 8-Wire Resistive Touch Screen
        Controller (TSC) Interface
    • Up to Three 32-Bit eCAP Modules
      • Configurable as Three Capture Inputs or
        Three Auxiliary PWM utputs
    • Up to Three Enhanced High-Resolution PWM
      Modules (eHRPWMs)
      • 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
    • Contains Electrical Fuse Farm (FuseFarm) of
      Which Some Bits are Factory Programmable
      • Production ID
      • Device Part Number (Unique JTAG ID)
      • Device Revision (Readable by Host ARM)
  • Debug Interface Support
    • JTAG and cJTAG for ARM (Cortex-A8 and
      PRCM), PRU-ICSS Debug
    • Supports Device Boundary Scan
    • Supports IEEE 1500
  • DMA
    • On-Chip Enhanced DMA Controller (EDMA) has
      Three Third-Party Transfer Controllers
      (TPTCs) 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, GPMC, Slave Peripherals)
  • Inter-Processor Communication (IPC)
    • Integrates Hardware-Based Mailbox for IPC and
      Spinlock for Process Synchronization Between
      Cortex-A8, PRCM, and PRU-ICSS
      • Mailbox Registers that Generate Interrupts
        • Four Initiators (Cortex-A8, PRCM, PRU0, PRU1)
      • Spinlock has 128 Software-Assigned Lock Registers
  • Security
    • Crypto Hardware Accelerators (AES, SHA,
    • Secure Boot
  • Boot Modes
    • Boot Mode is Selected Through Boot
      Configuration Pins Latched on the Rising Edge
      of the PWRONRSTn Reset Input Pin
  • Packages:
    • 298-Pin S-PBGA-N298 Via Channel Package
      (ZCE Suffix), 0.65-mm Ball Pitch
    • 324-Pin S-PBGA-N324 Package
      (ZCZ Suffix), 0.80-mm Ball Pitch


ARM MHz (Max.) 300^600   
Serial I/O I2C^SPI^UART^USB   
Security Enabler Cryptographic acceleration^Debug security^Initial secure programming^Secure boot^Secure storage^Software IP protection^Trusted execution environment   
Co-Processor(s) N/A   
Graphics Acceleration N/A   
EMAC 10/100/1000   
Industrial Protocols N/A   
Operating Temperature Range (C) -40 to 105^0 to 90   
Approx. Price (US$) 4.96 | 1ku   

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