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Sub-$10 processor does HD video, runs Windows CE
Sep. 04, 2007

[Updated Sep. 18] -- Texas Instruments (TI) is sampling an ultra low-cost, ARM9-based embedded processor with an integrated high-definition (HD) video encoder. The chipmaker launched its sub-$10 TMS320DM355 SoC (system-on-chip), which runs Windows CE, at the IBC video broadcaster's convention in London this week.

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The DM355 targets portable, battery-powered consumer devices with HD video capabilities, such as digital cameras, IP video cameras, digital photo frames, video doorbells, and baby monitors. The DM355 draws only 400mW while encoding 720p MPEG-4 video streams, and only 1mW while standing by -- miserly enough to "double" battery life compared to currently available devices, claims TI. For example, an AA battery-powered digital camera based on the chip should be able to record 80 minutes of HD video, the company suggests.

The DM355 is the newest product in TI's DaVinci processor line. To date, DaVinci SoCs have been dual-core chips that combine multimedia-oriented DSPs (digital signal processors) with an ARM-based applications processor or DSPs with integrated video processing subsystems.

The DM355 is based on an ARM926EJ-S RISC processor core clocked at 216 or 270 MHz. But instead of a DSP, the DM355 integrates an MPEG-4 and JPEG coprocessor (MJCP) core clocked at 640MHz, along with a dedicated video processing subsystem.


DM355 function block diagram
(Click to enlarge)

The DM355 also integrates an external memory interface (EMIF) controllers for power-saving DDR2 SDRAM and low-cost NAND flash, a pair of SD/MMC interfaces, high-speed (480Mbps) USB 2.0 OTG (on-the-go) interface, an EDMA (extended DMA controller), and various serial interfaces and timers.


TI's DM355 eval board
(Click to enlarge)
The DM355 is initially offered as part of a DM355 Digital Video Evaluation Module (DVEVM), which currently includes Linux support. TI says other "development tools will be available with an eight-week lead time," adding that Windows CE support is being developed by its services and support partner, Logic Product Development.

In February, TI released a Windows CE 5.0 SDK for its TMS320DM644x SoCs, but these are said to have a different architecture from the new DM355.

Availability

The DM355 is currently sampling, along with the $500 DM355 DVEVM. The SoC itself will be priced at $9.75 in OEM (original equipment manufacturer) quantities of 50,000, although there appears to be an extra charge for production use of the included codecs for JPEG, MPEG-4 SP, and G.711, and for production use of the IP function blocks for video I/O, audio I/O, external EMAC, USB 2.0 OTG, and JTAG. ORCAD schematics are also available at no charge.



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