·时钟速度为100MHz ·功耗小于1W

at a glance:

• Device clock speed is 100 MHz.
• Device consumes less than 1W of power.

The TMS320DSC21, TMS320DSC24, and TMS320DSC25 DSPs digital-imaging systems on a single chip combine a TMS320C5000 DSP and an ARM7TDMI RISC processor targeting media-processing and system-control functions. The chips integrate a video encoder with an on-screen display, an SDRAM controller with a bandwidth-transfer rate of 320 Mbytes/sec, and a preview engine that performs 30-frame/sec NTSC and PAL previewing (DSC21/DSC25). The DSCx family of products can achieve real-time processing of a full-resolution 2 million-pixel image with a 1-sec shot-to-shot delay. DSCx DSPs can support the capture of high-resolution still photos and can record video clips with audio and music from the Internet. These systems support digital-audio and -video formats, including real-time MPEG-1, MPEG-4, JPEG, M-JPEG, H.263, and MP3, as well as data-communication standards, such as IrDA (DSC21), USB, and RS-232.

Addressing and processing modes: Addressing modes include SDRAM, SRAM, flash-media, and removable-media interfaces. The SDRAM transfer rate is 80 Mbytes/sec with both 332 (DSC21/24/25) and 316 (DSC24) interface capabilities. The DSC24 enables 2-D-to-2-D data transfer from SDRAM to an on-chip image buffer, as well as direct SDRAM access via an SDRAM controller. The ARM can access the DSP via the host-port interface, and its bus controller has on- or off-chip access to general-purpose I/O, flash, Compact flash, and Smart Media applications.

Special instructions or integral-peripheral functions: In addition to the TMS320C54x DSP-generation instruction set, the DSCx DSP subsystem incorporates imaging enhancements to provide fast-block-based processing for imaging or video-encoding and -decoding functions.

Development support: Texas Instruments’ eXpressDSP real-time-software and development tools encompass development for all TMS320 devices and include the Code Composer Studio integrated development environment; the DSP/BIOS scalable real-time kernel, the TMS320 DSP algorithm standard set of coding conventions and APIs, and a third-party network. Evaluation modules, technical training classes, and customer-application support are also available.

The Innovator development kit for OMAP is a handheld, expandable, flexible development platform for OMAP. Code Composer Studio IDE for OMAP integrates all host and target tools into one environment, simplifying DSP configuration and optimization to take full advantage of the high-performance processing capabilities of the DSP core in the OMAP5910 device. CCStudio for OMAP addresses each phase of the code- development cycle, including designing, coding and building, debugging, analyzing, and optimizing. OMAP simulation includes both TMS320C5000 and ARM925 simulators for heterogeneous debugging.

The network-video-developer’s kit for the C6000TM platform, based on ATEME’s (http://www.ateme.com/) IEKC64x, is an evaluation and development board using the TMS320C6416 DSP. This kit includes applications for image, video-stream, and audio compression. Software support for the DM310 includes modules for audio, video, and imaging compression and transmission standards, including MPEG-1, MPEG-2, MPEG-4, H.263, JPEG, M-JPEG, AAC, MP3, and Windows Media Audio. Additional support for software integration includes a DSP and ARM framework, providing a “plug-and-play”-like environment and evaluation modules. DM310’s object code compatibility with DSC2x platform enables developers to begin programming using DSC platforms then port the development software to newer devices in the family as they become available.