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Do you have plan to make the highest speed of DMD in the near future (~2012) ? DO you have Roadmap of DMD ?
Currently, the Discovery 4000 will not support the SVGA DMD. We will continue to review market inputs for next generation kits. It would be great to hear what applications this might enable to have a high speed global DMD.
In the near term, it is possible to only drive portions of the XGA DMD to reduce repeat rate. For example,
The XGA is broken into 16 - 48 row blocks (16*48=1024). If you only needed to load and reset 600 lines (SVGA), then you only need to load and reset 13 blocks.
At the maximum possible DMD Dataload speed (400MHz), then each block requires 1.92 us to load. Thus, 13 blocks takes ~ 25us (13*1.92). After the DMD is loaded, a global reset is issued which takes ~ 5us, and there is also a Mirror hold time required before loading new data of ~8us.
Total Time to load and reset 13 blocks is 25us + 5us + 8us = 38us, which is 26KHz refresh rate.
An SVGA DMD loaded at 400MHz, would only decrease the data load time by a ratio of .78 (800/1024), mean the load time could theoretically decrease from 25 us to 19.5us.
SVGA Refresh rate would theoretically be 19.5us + 5us + 8 us = 32.5us, which is ~31KHz.
To achieve, 44KHz would require very significant reduction of DMD data load, which means faster Clock rate 400Mhz->800MHz). To achieve 88 KHz, would require also require reduction to the Reset and hold time, which would require significant changes to the mirror technology itself. We are always investigating new applications and what it would take to support them. If possible, please let us know what applications these refresh rates might support.
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