DSP Fixed-Point 32-Bit 594MHz/297MHz 4752MIPS 361-Pin NFBGA

The TMS320DM6446 devices (also referenced as DM6446 and including the SM320DM6446) leverages TI’s DaVinci technology to meet the networked media encode and decode application processing needs of next-generation embedded devices. The DM6446 enables OEMs and ODMs to quickly bring to market devices featuring robust operating systems support, rich user interfaces, high processing performance, and long battery life through the maximum flexibility of a fully integrated mixed processor solution. The dual-core architecture of the DM6446 provides benefits of both DSP and Reduced Instruction Set Computer (RISC) technologies, incorporating a high-performance TMS320C64x+– DSP core and an ARM926EJ-S core. The ARM926EJ-S is a 32-bit RISC processor core that performs 32-bit or 16-bit instructions and processes 32-bit, 16-bit, or 8-bit data. The core uses pipelining so that all parts of the processor and memory system can operate continuously. The ARM core incorporates: A coprocessor 15 (CP15) and protection module Data and program Memory Management Units (MMUs) with table look-aside buffers. Separate 16K-byte instruction and 8K-byte data caches. Both are four-way associative with virtual index virtual tag (VIVT). The TMS320C64x+ DSPs are the highest-performance fixed-point DSP generation in the TMS320C6000 DSP platform. It is based on an enhanced version of the second-generation high-performance, advanced very-long-instruction-word (VLIW) architecture developed by Texas Instruments (TI), making these DSP cores an excellent choice for digital media applications. The C64x is a code-compatible member of the C6000 DSP platform. The TMS320C64x+ DSP is an enhancement of the C64x+ DSP with added functionality and an expanded instruction set. Any reference to the C64x DSP or C64x CPU also applies, unless otherwise noted, to the C64x+ DSP and C64x+ CPU, respectively. With performance of up to 4752 million instructions per second (MIPS) at a clock rate of 594 MHz, the C64x+ core offers solutions to high-performance DSP programming challenges. The DSP core possesses the operational flexibility of high-speed controllers and the numerical capability of array processors. The C64x+ DSP core processor has 64 general-purpose registers of 32-bit word length and eight highly independent functional units—two multipliers for a 32-bit result and six arithmetic logic units (ALUs). The eight functional units include instructions to accelerate the performance in video and imaging applications. The DSP core can produce four 16-bit multiply-accumulates (MACs) per cycle for a total of 2376 million MACs per second (MMACS), or eight 8-bit MACs per cycle for a total of 4752 MMACS. For more details on the C64x+ DSP, see the TMS320C64x/C64x+ DSP CPU and Instruction Set Reference Guide (literature number SPRU732). The DM6446 also has application-specific hardware logic, on-chip memory, and additional on-chip peripherals similar to the other C6000 DSP platform devices. The DM6446 core uses a two-level cache-based architecture. The Level 1 program cache (L1P) is a 256K-bit direct mapped cache and the Level 1 data cache (L1D) is a 640K-bit 2-way set-associative cache. The Level 2 memory/cache (L2) consists of an 512K-bit memory space that is shared between program and data space. L2 memory can be configured as mapped memory, cache, or combinations of the two.

High-Performance Digital Media SoC

• 594-MHz C64x+ Clock Rates
• 297-MHz ARM926EJ-S Clock Rates
• Eight 32-Bit C64x+ Instructions/Cycle
• 4752 C64x+ MIPS
• Fully Software-Compatible With C64x/ARM9

Advanced Very-Long-Instruction-Word (VLIW)
TMS320C64x+ DSP Core

• Eight Highly Independent Functional Units
  • Six ALUs (32-/40-Bit), Each Supports Single 32-Bit,
    Dual 16-Bit, or Quad 8-Bit Arithmetic per Clock Cycle
  • Two Multipliers Support Four 16 x 16-Bit Multiplies
    (32-Bit Results) per Clock Cycle or Eight 8 x 8-Bit
    Multiplies (16-Bit Results) per Clock Cycle
• Load-Store Architecture With Non-Aligned Support
• 64 32-Bit General-Purpose Registers
• Instruction Packing Reduces Code Size
• All Instructions Conditional
• Additional C64x+ Enhancements
  • Protected Mode Operation
  • Exceptions Support for Error Detection and
    Program Redirection

C64x+ Instruction Set Features

• Byte-Addressable (8-/16-/32-/64-Bit Data)
• 8-Bit Overflow Protection
• Bit-Field Extract, Set, Clear
• Normalization, Saturation, Bit-Counting
• Compact 16-Bit Instructions

C64x+ L1/L2 Memory Architecture

• 32K-Byte L1P Program RAM/Cache
• 80K-Byte L1D Data RAM/Cache
• 64K-Byte L2 Unified Mapped RAM/Cache

ARM926EJ-S Core

• Support for 32-Bit and 16-Bit (Thumb Mode)
  Instruction Sets
• DSP Instruction Extensions and Single Cycle MAC
• ARM Jazelle Technology
• EmbeddedICE-RT Logic for Real-Time Debug

ARM9 Memory Architecture

• 16K-Byte Instruction Cache
• 8K-Byte Data Cache
• 16K-Byte RAM
• 8K-Byte ROM

Embedded Trace Buffer With 4KB
Memory for ARM9 Debug

Endianness: Little Endian for ARM and DSP

Video Processing Subsystem

• Front End Provides:
  • CCD and CMOS Imager Interface
  • BT.601/BT.656 Digital YCbCr 4:2:2
    (8-/16-Bit) Interface
  • Preview Engine for Real-Time Image Processing
  • Glueless Interface to Common Video Decoders
  • Histogram Module
  • Auto-Exposure, Auto-white Balance and Auto-Focus Module
  • Resize Endine
    • Resize Images From 1/4x to 4x
    • Separate Horizontal/Vertical Control
• Back End Provides:
  • Hardware On-Screen Display (OSD)
  • Four 54_MHz DACs for a Combination of
    • Composite NTSC/PAL Video
    • Luma/Chroma Separate Video (S-Video)
    • Component (YPbPR or RGB) Video (Progressive)
  • Digital Output
    • 8-/16-bit YUV or up to 24-Bit RGB
    • HD Resolution
    • Up to 2 Video Windows

External Memory Interfaces (EMIFs)

• 32-Bit DDR2 SDRAM Memory Controller With
  256M-Byte Address Space (1.8-V I/O)
• Asynchronous 16-Bit Wide EMIF (EMIFA) With 128M-Byte
  Address Reach
  • Flash Memory Interfaces
    • NOR (8-/16-Bit-Wide Data)
    • NAND (8-/16-Bit-Wide Data)

Flash Card Interfaces

• Multimedia Card (MMC)/Secure Digital (SD)
  with Secure Data I/O (SDIO)
• Compact Flash Controller With True IDE Mode
• SmartMedia

Enhanced Direct-Memory-Access (EDMA)
Controller (64 Independent Channels)

Two 64-Bit General-Purpose Timers (Each
Configurable as Two 32-Bit Timers)

One 64-Bit Watch Dog Timer

Three UARTs (One with RTS and CTS Flow Control)