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Texas Instruments SM320DM6446AZWTA
- Part No.:
- SM320DM6446AZWTA
- Manufacturer:
- Texas Instruments
- Category:
- DSP (Digital Signal Processors)
- Package:
- 361-LFBGA
- Datasheet:
-
SM320DM6446AZWTA.pdf
- Description:
- IC DIGITAL MEDIA SOC 361NFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,927
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Product details
Overview
SM320DM6446AZWTA from Texas Instruments is a dual-core digital media system-on-chip (DMSoC) integrating an ARM926EJ-S RISC processor (297 MHz) and a TMS320C64x+ DSP core (594 MHz), with 160 KB on-chip RAM, 8 KB ROM, and a dedicated Video Processing Subsystem (VPSS) for real-time video capture and display. It supports BT.656/YCbCr 4:2:2 input, NTSC/PAL/S-Video/component analog output via four 54-MHz DACs, and is deployed in defense-grade networked media encode/decode systems operating from –40°C to 105°C.
For engineers reviewing the SM320DM6446AZWTA datasheet, SM320DM6446AZWTA pinout, SM320DM6446AZWTA application, or SM320DM6446AZWTA equivalent, key selection criteria include dual-core clock synchronization, VPSS front-end preview engine capability, DDR2 + EMIFA memory interface coexistence, ARM/DSP power domain isolation, and TI DaVinci™-optimized Linux® BSP support.
Technical Context
The SM320DM6446AZWTA implements a tightly coupled ARM926EJ-S and C64x+ DSP subsystem sharing L2 unified memory (64 KB), with separate L1 instruction/data caches (16 KB I-cache / 8 KB D-cache for ARM; 32 KB L1P / 80 KB L1D for DSP). Its VPSS includes a CCD/CMOS-imager-capable Video Processing Front-End (VPFE) with histogram, H3A auto-exposure/white-balance/focus, and resizer (1/4×–4×), plus a Video Processing Back-End (VPBE) with OSD engine (2 video + 2 OSD windows) and VENC supporting composite, S-video, component, and 24-bit RGB digital output.
Connectivity is managed through a 10/100 Mb/s Ethernet MAC with MDIO, USB 2.0 host/client PHY, VLYNQ FPGA interface, HPI, three UARTs (one with RTS/CTS), SPI, I²C, and EDMA controller with 64 independent channels. Power management includes per-subsystem sleep modes, PLL clock generators with x1/x22 multipliers (27 MHz reference), and 1.2-V core / 1.8-V & 3.3-V I/O voltage domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Architecture | Dual-core: ARM926EJ-S (297 MHz) + C64x+ DSP (594 MHz); enables concurrent OS management (ARM) and real-time video algorithm execution (DSP) |
| On-Chip Memory | 160 KB RAM (16 KB ARM RAM + 32 KB L1P + 80 KB L1D + 64 KB L2) + 8 KB ARM ROM bootloader; eliminates need for external boot ROM in NAND/UART boot modes |
| Video I/O | VPFE supports BT.656/YCbCr 4:2:2, CMOS/CCD sensors; VPBE provides 4×54-MHz DACs for NTSC/PAL/S-Video/component + 24-bit RGB digital output; enables single-chip HD video pipeline |
| Memory Interfaces | 32-bit DDR2 SDRAM controller (256 MB space) + asynchronous EMIFA (128 MB, 8/16-bit NOR/NAND/SmartMedia); supports high-bandwidth video frame buffering and flash-based firmware storage |
| Peripherals | 10/100 EMAC with MDIO, USB 2.0 PHY (host/client), VLYNQ, HPI, 3×UART, SPI, I²C, ASP, 3×PWM, 2×64-bit timers, 71 GPIO; enables full-system connectivity without companion ICs |
| Package & Environment | 361-pin Pb-free BGA (ZWT, 16×16 mm, 0.8-mm pitch); rated for extended temperature range (–40°C to 105°C); qualified for defense, aerospace, and medical applications |
Pinout & Package
SM320DM6446AZWTA is housed in a 361-pin Pb-free BGA package (ZWT suffix), 16 mm × 16 mm body size, 0.8-mm ball pitch, designed for high-density PCB layouts in ruggedized embedded systems. Pin assignments are defined in TI SPRS607A Section 2.6 (Pin Assignments) and Section 2.7 (Terminal Functions), with multiplexed functions across 71 GPIOs, dual video ports, DDR2/EMIFA buses, and peripheral interfaces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Primary clock input | Accepts 27-MHz crystal or oscillator; feeds PLLs for ARM/DSP/DDR2/VPSS domain clocks; bypass mode (x1) or multiplied (x22) operation supported |
| VDD_CORE | Core power supply | 1.2-V supply for ARM926EJ-S and C64x+ DSP cores; requires low-noise regulation due to high-speed switching current demands |
| VDD_18 | I/O power supply | 1.8-V supply for DDR2 interface, VPSS digital I/O, and select peripherals; decoupling critical for signal integrity at 270+ Mbps DDR2 data rates |
| VDD_33 | I/O power supply | 3.3-V supply for EMAC, USB PHY, UART, SPI, I²C, HPI, and general-purpose GPIO; enables direct interfacing with legacy industrial peripherals |
| VP0_CLK / VP0_D[7:0] | Video port 0 clock and data | BT.656 YCbCr 4:2:2 parallel input interface (8-bit bus); used for camera sensor or video decoder connection in VPFE capture path |
| VENC_DAC[3:0] | Analog video DAC outputs | Four 10-bit DACs running at 54 MHz; generate composite NTSC/PAL, S-video (Y/C), or component (YPbPr/RGB) analog video signals directly |
Key Features
| Feature | Design Value |
|---|---|
| ARM926EJ-S + C64x+ Dual-Core Architecture | Enables Linux®-based application layer (ARM) and real-time video encoding/decoding (DSP) on single die; avoids inter-processor latency of discrete solutions |
| Integrated Video Processing Subsystem (VPSS) | Combines VPFE (CCDC, preview engine, histogram, H3A, resizer) and VPBE (OSD, VENC) to offload >80% of video preprocessing/postprocessing from DSP core |
| DaVinci™-Optimized Peripheral Set | Includes EMAC with QoS, USB 2.0 PHY, VLYNQ for FPGA co-processing, and EDMA with 64 channels - all pre-integrated and validated for media streaming workloads |
| Extended Temperature & Controlled Baseline | Rated for –40°C to 105°C operation with extended product life cycle, traceability, and change notification - meets MIL-PRF-38535 Class V requirements for defense use |
| ARM Bootloader (RBL) in On-Chip ROM | Supports NAND flash or UART boot without external ROM; reduces BOM count and boot reliability risk in field-deployed imaging systems |
Applications
| IP Camera with Edge Analytics | Medical Endoscopy Imaging System |
|---|---|
|
Use Scenario: Real-time H.264 encoding of 720p video with motion detection and metadata overlay in compact outdoor surveillance housing. IC Role / Device Role / Timing Role: SM320DM6446AZWTA serves as the central media SoC - ARM handles RTSP streaming stack and web UI; DSP executes encoder; VPSS captures raw sensor data and overlays OSD graphics. Use Value: Single-chip integration eliminates external video ADC, DAC, and memory controller; 594-MHz DSP delivers 4752 MIPS for sub-50ms encode latency at 30 fps. |
Use Scenario: High-resolution endoscopic video acquisition with real-time white balance correction, image enhancement, and HDMI output in sterile clinical environment. IC Role / Device Role / Timing Role: SM320DM6446AZWTA acts as video acquisition and processing hub - VPFE ingests Bayer-pattern CMOS sensor data; H3A module performs auto-white balance; VPBE drives HDMI via RGB888 digital output. Use Value: On-chip histogram and preview engine enable closed-loop exposure control without host CPU intervention; extended temperature rating ensures stable operation during sterilization cycles. |
| Military UAV Video Downlink Terminal | Digital Signage Media Player |
|
Use Scenario: Secure, low-latency video transmission from airborne platform using AES-encrypted H.264 stream over 100BASE-TX Ethernet. IC Role / Device Role / Timing Role: SM320DM6446AZWTA functions as hardened media encoder - ARM manages encryption and network stack; DSP runs optimized codec; EMAC with MDIO auto-detects and configures military-grade PHY. Use Value: A-temp qualification (–40°C to 105°C) and controlled baseline ensure reliability under rapid thermal cycling; VLYNQ interface allows FPGA-based crypto acceleration co-processing. |
Use Scenario: Commercial kiosk displaying dynamic 1080p content with animated overlays, audio playback, and remote firmware updates via USB or SD card. IC Role / Device Role / Timing Role: SM320DM6446AZWTA operates as all-in-one media controller - ARM runs embedded Linux GUI; ASP drives AC97 audio codec; MMC/SD interface loads updated assets; USB 2.0 enables field service. Use Value: Integrated ATA/CompactFlash and MMC/SD controllers eliminate need for external bridge ICs; 71 GPIOs support custom I/O for button, sensor, and status LED integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital media SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMS320DM365ZCE | ARM9 + HDVICP coprocessor (no C64x+ DSP); 300-MHz ARM; no DDR2 controller; supports H.264 BP/MP up to 1080p30 | Better power efficiency for pure video encode; lacks DSP programmability for custom algorithms or multi-format decode | Select when fixed-function H.264 encoding dominates workload and DSP flexibility is unnecessary |
| SM320C6455BCT | Dedicated C64x+ DSP only (1 GHz); no ARM core; no VPSS; 256 KB L2 cache; SRIO and RapidIO interfaces | Higher raw DSP performance for radar/communications; requires external ARM host and video interface ICs | Select when real-time signal processing (not media streaming) is primary requirement and system architecture separates control and compute |
Compared with SM320DM6446AZWTA, the DM365 offers lower power and hardware-accelerated H.264 but forfeits programmable DSP compute; the C6455 delivers 2× DSP MIPS but adds system complexity with external video and control logic - making SM320DM6446AZWTA optimal for balanced, integrated media processing where ARM-DSP synergy and VPSS are essential.
Availability
SM320DM6446AZWTA is available at Aetrix Electronics and suitable for defense electronics, medical imaging devices, and industrial video analytics systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SM320DM6446AZWTA 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 leader specializing in analog, embedded processing, and digital signal processing technologies, with decades of heritage in DSP innovation and industrial-grade reliability.
The SM320DM6446AZWTA belongs to TI's DaVinci™ digital media SoC product line, engineered specifically for networked video encode/decode, intelligent imaging, and real-time multimedia processing in harsh-environment applications.
FAQ
What is the maximum DDR2 memory bandwidth supported by the SM320DM6446AZWTA?
The SM320DM6446AZWTA integrates a 32-bit DDR2 SDRAM memory controller supporting up to 256 MB address space and 1.8-V I/O. With a 270-MHz DDR2 clock (540 MT/s data rate), peak theoretical bandwidth is 2.16 GB/s - sufficient for dual-stream 720p30 video buffering and real-time DSP frame processing without external memory bottlenecks. This bandwidth is confirmed in SPRS607A Section 6.10.
Does the SM320DM6446AZWTA support booting from NAND flash without external components?
Yes. The SM320DM6446AZWTA includes an on-chip ARM ROM bootloader (RBL) that natively supports NAND flash boot - no external ROM or configuration EEPROM is required. The RBL handles ECC calculation, bad-block management, and image loading into internal RAM, enabling fully autonomous startup from NAND. This capability is documented in SPRS607A Section 3.3 (Bootmode).
How many independent video windows can the SM320DM6446AZWTA's OSD engine render simultaneously?
The SM320DM6446AZWTA's On-Screen Display (OSD) engine supports up to two independent video windows and two independent OSD windows concurrently, with configurable alpha blending across eight levels. Alternative configurations include two video windows plus one OSD window and one attribute window - all implemented in hardware without consuming DSP or ARM cycles. This is specified in SPRS607A Section 6.13.3 (OSD Engine).
Is the SM320DM6446AZWTA pin-compatible with other DaVinci™ devices like the DM365 or DM368?
No. The SM320DM6446AZWTA uses a 361-pin ZWT BGA package with unique pinout optimized for its dual-core architecture, DDR2 interface, and VPSS subsystem. Devices such as the DM365 (324-pin ZCE) and DM368 (361-pin ZCE but different ball map) have incompatible pin assignments, power domains, and peripheral mappings - requiring distinct PCB layouts and schematic designs.
What video standards does the SM320DM6446AZWTA's VENC support for analog output?
The SM320DM6446AZWTA's Video Encoder (VENC) supports NTSC and PAL composite video, S-video (Y/C), and component video (YPbPr or RGB progressive) via four integrated 54-MHz 10-bit DACs. Output timing complies with ITU-R BT.601 and BT.656 standards, and analog signal generation is fully hardware-managed without CPU or DSP intervention - as detailed in SPRS607A Section 6.13.4 (VENC).
SM320DM6446AZWTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TMS320DM644x, DaVinci™
- Package/Case:
- 361-LFBGA
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Digital Media System-on-Chip (DMSoC)
- Interface:
- ASP, Host Interface, I2C, SPI, UART, USB
- Clock Rate:
- 594MHz DSP, 297MHz ARM®
- Non-Volatile Memory:
- ROM (16kB)
- On-Chip RAM:
- 216kB
- Voltage - I/O:
- 1.8V, 3.3V
- Voltage - Core:
- 1.20V
- Operating Temperature:
- -40°C ~ 105°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 361-NFBGA (16x16)
SM320DM6446AZWTA FAQ
1.How can I place an order for SM320DM6446AZWTA through Aetrix?
Please submit a Request for Quotation (RFQ) for SM320DM6446AZWTA 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 SM320DM6446AZWTA reliable?
The price and inventory of SM320DM6446AZWTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM320DM6446AZWTA is usually 5 days.
3.What payment methods are accepted for SM320DM6446AZWTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM320DM6446AZWTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM320DM6446AZWTA?
SM320DM6446AZWTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM320DM6446AZWTA 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 SM320DM6446AZWTA?
For technical support, including SM320DM6446AZWTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM320DM6446AZWTA requirements.
6.How does Aetrix verify that SM320DM6446AZWTA is sourced from the original manufacturer or authorized distributors?
All SM320DM6446AZWTA 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 SM320DM6446AZWTA meets industry standards.
7.What is the process for return or replacement of SM320DM6446AZWTA?
All SM320DM6446AZWTA units undergo pre-shipment inspection (PSI). If there is an issue with SM320DM6446AZWTA, 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 SM320DM6446AZWTA part is unused and in its original packaging.
Return procedure for SM320DM6446AZWTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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