Hi folks! In this page
"Each DSP48E slice (Xilinx Virtex-5) is equivalent to over 500 slices of programmable logic, consumes 1/10th the power of an equivalent logic implementation".
Does anyone have the same info for XtremeDSP48 (Virtex-4)?
Thank you for your answer.
programmable logic, consumes 1/10th the power of an equivalent logic implementation".
Hi, the V4 silicon may use a different technology, but basically the same rule applies. A DSP48 consists of a multiplier and some adders,muxes and registers. All of this is made as a real hardmacro, so almost no power for configuration and storage elements is wasted like what is needed in LUTs.(Just a few MUX config bits to bypass registers etc..) The number of V4 Slices to create some DSP48 alike design will probably be higher, since V$ Luts have only four inputs, while V5 LUTS have six.
More accurate information may be derived from the V4 datasheets, or open a thread in the forums at xilinx if no satisfying answer appears here.
Have a nice synthesis Eilert
Thank you backhus for the quick answer.
programmable logic, consumes 1/10th the power of an equivalent logic implementation".
Those numbers are in the category of "marketing b**ll*x", and should not be relied upon for any serious purpose.
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