PRODUCT PREVIEW

TMS320DM355

Digital Media System-on-Chip (DMSoC)

www.ti.com

SPRS463A –SEPTEMBER 2007 –REVISED SEPTEMBER 2007

5.7.2DDR2 Memory Controller

The DDR2 / mDDR Memory Controller is a dedicated interface to DDR2 / mDDR SDRAM. It supports JESD79D-2A standard compliant DDR2 SDRAM devices and compliant Mobile DDR SDRAM devices. DDR2 / mDDR SDRAM plays a key role in a DM355-based system. Such a system is expected to require a significant amount of high-speed external memory for all of the following functions:

∙Buffering of input image data from sensors or video sources

∙Intermediate buffering for processing/resizing of image data in the VPFE

∙Numerous OSD display buffers

∙Intermediate buffering for large raw Bayer data image files while performing image processing functions

∙Buffering for intermediate data while performing video encode and decode functions

∙Storage of executable code for the ARM

The DDR2 / mDDR Memory Controller supports the following features:

∙JESD79D-2A standard compliant DDR2 SDRAM

∙Mobile DDR SDRAM

∙256 MByte memory space

∙Data bus width 16 bits

∙CAS latencies:

–DDR2: 2, 3, 4, and 5

–mDDR: 2 and 3

∙Internal banks:

–DDR2: 1, 2, 4, and 8

–mDDR: 1, 2, and 4

∙Burst length: 8

∙Burst type: sequential

∙1 CS signal

∙Page sizes: 256, 512, 1024, and 2048

∙SDRAM autoinitialization

∙Self-refresh mode

∙Partial array self-refresh (for mDDR)

∙Power down mode

∙Prioritized refresh

∙Programmable refresh rate and backlog counter

∙Programmable timing parameters

∙Little endian

For details on the DDR2 Memory Controller, refer to the DDR/mDDR Peripheral Reference Guide.

5.7.2.1 DDR2/mDDR Memory Controller Electrical Data/Timing

TI only supports DDR2/mDDR board designs that follow the guidelines described in the application note titled TMS320DM355 DDR2 / mDDR Board Design Application Note. Refer to this application note for information on board design recommendations and guidelines for DDR2 and mDDR.

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Peripheral Information and Electrical Specifications

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Texas Instruments TMS320DM355 warranty 2 DDR2 Memory Controller, 2.1 DDR2/mDDR Memory Controller Electrical Data/Timing
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TMS320DM355 specifications

The Texas Instruments TMS320DM355 is a versatile digital signal processor designed to support a wide array of multimedia applications, specifically in the realms of digital video and audio processing. As part of the TMS320 family of digital signal processors, the DM355 brings a blend of computational power, energy efficiency, and integrated features that make it highly effective for tasks such as video encoding, decoding, and general signal processing.

One of the standout features of the DM355 is its advanced DaVinci architecture, which is specifically optimized for multimedia tasks. This architecture integrates both DSP and application processing functionalities. The dual-core architecture includes a high-performance DSP core that specializes in real-time signal processing alongside an ARM926EJ-S RISC microprocessor, facilitating the execution of complex algorithms and control tasks.

The DM355 offers robust multimedia processing capabilities with support for several video formats, including MPEG-2, MPEG-4, H.264, and JPEG. This enables developers to create powerful video applications for a variety of devices, from industrial systems to consumer electronics. Its processing capabilities extend to audio processing, allowing it to efficiently handle audio codecs and enhance audio quality in applications ranging from IP cameras to set-top boxes.

In terms of connectivity, the TMS320DM355 supports various interfaces including USB 2.0, Ethernet, and various serial interfaces like UART, SPI, and I2C. This wide range of connectivity options ensures that the DM355 can easily interface with different peripherals and network components, making it a suitable choice for networked applications.

Energy efficiency is another significant advantage of the DM355. With a focus on low power consumption, the device is designed to operate effectively in battery-powered and heat-sensitive environments. Its low thermal design power allows for extended operational life and reduced thermal management requirements, making it ideal for portable devices.

Furthermore, the DM355 is supported by a comprehensive software development framework, including the TI Code Composer Studio and a range of middleware tools, which streamline application development and speed up time to market. Its rich ecosystem enhances its usability across different applications, ensuring that developers can leverage the full potential of the hardware.

In summary, the Texas Instruments TMS320DM355 stands out as a powerful yet cost-effective DSP solution, combining advanced multimedia processing capabilities, robust connectivity options, and energy efficiency. Its unique architecture and extensive support resources make it a preferred choice for developers seeking to create innovative multimedia solutions.
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