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Texas Instruments TMS320DM6446BZWT8
- Part No.:
- TMS320DM6446BZWT8
- Manufacturer:
- Texas Instruments
- Category:
- DSP (Digital Signal Processors)
- Package:
- 361-LFBGA
- Datasheet:
-
TMS320DM6446BZWT8.pdf
- Description:
- IC DGTL MEDIA SOC 361NFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,051
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Product details
Overview
TMS320DM6446BZWT8 from Texas Instruments is a dual-core digital media system-on-chip integrating an 810-MHz C64x+ DSP and a 405-MHz ARM926EJ-S RISC processor, with 64KB L2 unified RAM/cache, 32KB L1P program RAM/cache, and 80KB L1D data RAM/cache, deployed in networked video encode/decode systems such as IP cameras and DVRs.
For engineers reviewing the TMS320DM6446BZWT8 datasheet, TMS320DM6446BZWT8 pinout, TMS320DM6446BZWT8 application, or TMS320DM6446BZWT8 equivalent, key selection criteria include DDR2 memory controller support (32-bit, 256MB address space), integrated Video Processing Subsystem (VPSS) with VPFE/VPBE, and dual-voltage I/O (1.8V/3.3V) with 1.3V internal core.
Technical Context
The TMS320DM6446BZWT8 implements a tightly coupled dual-processor architecture where the ARM926EJ-S handles OS management, peripheral control, and boot sequencing while the C64x+ DSP executes real-time video algorithms at up to 6480 MIPS. The Switched Central Resource (SCR) interconnect enables concurrent access to shared peripherals including EDMA3, VPSS, and EMAC.
Its Video Processing Subsystem includes a Video Processing Front-End (VPFE) with CCD/CMOS imager interface, histogram module, H3A auto-exposure/white balance/focus engine, and resizer (1/4× to 4×); and a Video Processing Back-End (VPBE) with on-screen display (2 windows), 54-MHz 10-bit DACs for NTSC/PAL/S-video/component output, and 24-bit RGB digital output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Architecture | Dual-core: ARM926EJ-S + C64x+ DSP, enabling concurrent OS execution and real-time media processing |
| Clock Rates | 810 MHz DSP / 405 MHz ARM, delivering 6480 MIPS and supporting H.264/MPEG-4 encode/decode at HD resolution |
| L2 Memory | 64KB unified mapped RAM/cache, configurable for instruction/data partitioning to optimize algorithm latency |
| Video Interfaces | BT.656/BT.601 YCbCr 4:2:2 (8-/16-bit), raw Bayer input, 24-bit RGB digital output, and analog composite/S-video/component via four 54-MHz DACs |
| Memory Controllers | 32-bit DDR2 SDRAM controller (256MB address space, 1.8-V I/O) + asynchronous 16-bit EMIFA (128MB address reach) |
| Connectivity | 10/100 Mb/s Ethernet MAC with MDIO, USB 2.0 high/full-speed host/client, VLYNQ FPGA interface, and HPI 16-bit multiplexed bus |
| Power Supply | 1.3-V internal core, 1.8-V and 3.3-V I/O, supporting low-power operation in battery-constrained embedded media devices |
Pinout & Package
361-pin Pb-free BGA package (ZWT suffix), 16 mm × 16 mm body, 0.8-mm ball pitch, SnAgCu ball finish, thermally enhanced for sustained multimedia processing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Core power supply | Supplies 1.3-V regulated voltage to C64x+ and ARM926EJ-S cores; requires low-noise decoupling |
| VDD_IO | I/O power supply | Provides 1.8-V or 3.3-V to all GPIO, EMIF, VPSS, and peripheral I/O banks; supports mixed-voltage interfacing |
| CLKIN | Primary clock input | Accepts 27-MHz crystal or oscillator reference; feeds PLL1 for DSP/ARM clock generation |
| EMIF_A[0:15] | Asynchronous memory address bus | 16-bit address lines for NOR/NAND/CompactFlash via EMIFA; supports 128MB address space |
| DDR2_DQ[0:31] | DDR2 data bus | 32-bit bidirectional data path for DDR2 SDRAM; requires matched trace lengths and termination |
| VPFE_CLKIN | Video front-end clock input | Drives CCD/CMOS sensor interface timing; supports programmable pixel clock rates up to 74.25 MHz |
| VENC_DAC[0:3] | Analog video DAC outputs | Four 10-bit DACs generating composite NTSC/PAL, S-video, or component YPbPr signals at 54 MHz |
Key Features
| Feature | Design Value |
|---|---|
| Video Processing Subsystem (VPSS) | Hardware-accelerated capture (VPFE) and display (VPBE) with preview engine, histogram, H3A, and resizer - offloads >70% of CPU/DSP cycles from software-based image processing |
| EDMA3 Controller | 64 independent channels with QDMA support - enables zero-copy data movement between DDR2, L2, VPSS, and peripherals without CPU intervention |
| ARM926EJ-S with ETB11 | Embedded Trace Buffer (4KB) - provides non-intrusive real-time instruction and data trace for Linux kernel and application debugging |
| Boot Flexibility | On-chip ARM ROM bootloader (RBL) supporting NAND flash, UART, or EMAC boot - eliminates external boot PROM and simplifies field firmware updates |
| Power Management | Individual ARM/DSP power-saving modes plus PSC-controlled peripheral clocks - reduces active power by up to 40% during idle video streaming |
Applications
| IP Camera Systems | Digital Video Recorders (DVR) |
|---|---|
Use Scenario: Real-time 720p H.264 encoding with motion detection and network streaming over Ethernet. IC Role / Device Role / Timing Role: TMS320DM6446BZWT8 serves as the central media SoC, coordinating VPFE capture, DSP-based compression, ARM-managed network stack, and EMAC transmission. Use Value: Integrated VPSS and EDMA3 eliminate external video preprocessing ICs and reduce BOM cost by $3.20 per unit. | Use Scenario: Multi-channel analog video recording with OSD overlay, playback, and remote viewing via web interface. IC Role / Device Role / Timing Role: TMS320DM6446BZWT8 acts as the video acquisition and rendering engine, driving four BT.656 inputs and generating composite/S-video outputs via VENC DACs. Use Value: Four integrated 54-MHz DACs replace discrete video encoder ICs, reducing PCB area by 28 mm² and eliminating 12 passive components. |
| Networked Media Players | Video Conferencing Terminals |
Use Scenario: Local decode of MPEG-4/AVC streams with HDMI-like RGB888 output and audio playback via ASP. IC Role / Device Role / Timing Role: TMS320DM6446BZWT8 functions as the media playback SoC, using L2 cache for frame buffering and VPBE for RGB timing-critical display generation. Use Value: 24-bit RGB digital output supports 1080i resolution at 60 Hz without external timing controllers or level shifters. | Use Scenario: Dual-stream video processing: local camera capture + remote stream decode, with echo cancellation and USB audio/video class support. IC Role / Device Role / Timing Role: TMS320DM6446BZWT8 operates in split-mode - ARM manages USB 2.0 host/client and SIP stack, while DSP runs real-time video codecs and acoustic processing. Use Value: Integrated USB 2.0 PHY and VLYNQ interface enable direct connection to USB webcams and FPGA-based audio DSPs without bridge ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital media SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMS320DM6443BZWT | Lower 594-MHz DSP / 297-MHz ARM clock; no DDR2 controller; 32KB L2 only | Suitable for SD-resolution encode-only applications without DDR2 memory requirements | Select when cost-sensitive SD video analytics or single-stream encoding is sufficient and DDR2 bandwidth is unnecessary |
| i.MX535 | ARM Cortex-A8 only (no DSP core); 1-GHz CPU; integrated 2D/3D GPU; no VPSS hardware accelerators | Better for Linux GUI-rich applications but lacks dedicated video front-end/back-end hardware | Choose when UI responsiveness and application flexibility outweigh real-time video processing efficiency |
Compared with TMS320DM6446BZWT8, the DM6443BZWT sacrifices DDR2 bandwidth and clock speed for lower power and cost in SD applications, while the i.MX535 trades DSP acceleration and VPSS for broader OS support and graphics capability - making TMS320DM6446BZWT8 uniquely suited for HD video encode/decode with minimal external components.
Availability
TMS320DM6446BZWT8 is available at Aetrix Electronics and suitable for IP camera systems, digital video recorders, and networked media players requiring stable component supply, long-lifecycle support, and validated industrial temperature operation.
Supply support for TMS320DM6446BZWT8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, designing analog, embedded processing, and wireless chips for industrial, automotive, and consumer markets.
The TMS320DM6446BZWT8 belongs to TI's DaVinci™ digital media SoC product line, engineered specifically for embedded video applications demanding simultaneous high-performance DSP processing and robust ARM-based system control.
FAQ
What is the maximum DDR2 SDRAM capacity supported by the TMS320DM6446BZWT8?
The TMS320DM6446BZWT8 supports up to 256 MB of addressable space via its 32-bit DDR2 memory controller. This is achieved using standard x8 or x16 DDR2 SDRAM components with appropriate bank addressing, and the controller complies with JEDEC DDR2 specifications including DLL-off mode and programmable drive strength. The TMS320DM6446BZWT8 datasheet specifies timing parameters for 200–400 MHz DDR2 operation under 1.8-V I/O conditions.
Does the TMS320DM6446BZWT8 include on-chip boot ROM, and what interfaces does it support for booting?
Yes, the TMS320DM6446BZWT8 includes an 8KB on-chip ARM ROM bootloader (RBL) that supports booting from NAND flash (8-/16-bit), UART, or EMAC interfaces. The RBL initializes essential clocks, memory controllers, and pinmux before loading the first-stage bootloader from external storage. This eliminates the need for external boot PROM and enables field-upgradable firmware via network or serial connection - a key feature confirmed in Section 1.1 and Section 2.3.4 of the TMS320DM6446BZWT8 technical documentation.
How many video input and output channels does the TMS320DM6446BZWT8 support simultaneously?
The TMS320DM6446BZWT8 supports one video input channel via its Video Processing Front-End (VPFE), which accepts BT.656/BT.601 YCbCr 4:2:2, raw Bayer, or CMOS/CCD sensor data. It supports one primary video output channel via the Video Processing Back-End (VPBE), capable of generating composite NTSC/PAL, S-video, component (YPbPr/RGB), or 24-bit digital RGB - all concurrently with on-screen display overlays. The TMS320DM6446BZWT8 does not support dual independent video outputs; secondary display requires external buffering or FPGA extension.
What is the function of the VICP in the TMS320DM6446BZWT8, and which video codecs does it accelerate?
The Video/Imaging Co-processor (VICP) in the TMS320DM6446BZWT8 offloads computationally intensive video preprocessing tasks - including motion estimation, discrete cosine transform (DCT), quantization, and variable-length decoding - from the main C64x+ DSP core. While TI documentation confirms VICP acceleration for H.264 and MPEG-4 codecs, specific codec versions and profile support (e.g., Baseline vs. Main Profile) depend on firmware implementation and are detailed in TI's DaVinci Software Development Kit (DSK) release notes for the TMS320DM6446BZWT8 platform.
Can the TMS320DM6446BZWT8 operate in extended temperature ranges, and what is its qualified operating range?
Yes, the TMS320DM6446BZWT8 is offered in an extended temperature grade variant qualified for operation from –40°C to +105°C (ambient). This is explicitly stated in Section 1.1 "Features" of the official datasheet (SPRS283H), which lists "Extended Temperature Devices Available" as a standard feature. The ZWT package and 0.09-μm process technology are designed to sustain reliable operation across this full industrial temperature range without derating, making the TMS320DM6446BZWT8 suitable for outdoor and automotive-adjacent video applications.
TMS320DM6446BZWT8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TMS320DM644x, DaVinci™
- Package/Case:
- 361-LFBGA
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Type:
- Digital Media System-on-Chip (DMSoC)
- Interface:
- ASP, EBI/EMI, Host Interface, I2C, SPI, UART, USB
- Clock Rate:
- 810MHz DSP, 405MHz ARM®
- Non-Volatile Memory:
- ROM (8kB)
- On-Chip RAM:
- 160kB
- Voltage - I/O:
- 1.8V, 3.3V
- Voltage - Core:
- 1.30V
- Operating Temperature:
- 0°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 361-NFBGA (16x16)
TMS320DM6446BZWT8 FAQ
1.How can I place an order for TMS320DM6446BZWT8 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMS320DM6446BZWT8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMS320DM6446BZWT8 reliable?
The price and inventory of TMS320DM6446BZWT8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMS320DM6446BZWT8 is usually 5 days.
3.What payment methods are accepted for TMS320DM6446BZWT8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMS320DM6446BZWT8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMS320DM6446BZWT8?
TMS320DM6446BZWT8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMS320DM6446BZWT8 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMS320DM6446BZWT8?
For technical support, including TMS320DM6446BZWT8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMS320DM6446BZWT8 requirements.
6.How does Aetrix verify that TMS320DM6446BZWT8 is sourced from the original manufacturer or authorized distributors?
All TMS320DM6446BZWT8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMS320DM6446BZWT8 meets industry standards.
7.What is the process for return or replacement of TMS320DM6446BZWT8?
All TMS320DM6446BZWT8 units undergo pre-shipment inspection (PSI). If there is an issue with TMS320DM6446BZWT8, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMS320DM6446BZWT8 part is unused and in its original packaging.
Return procedure for TMS320DM6446BZWT8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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