EP3SE50F780I3N Altera, EP3SE50F780I3N Datasheet - Page 131
EP3SE50F780I3N
Manufacturer Part Number
EP3SE50F780I3N
Description
Stratix III
Manufacturer
Altera
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October 2007
Four-Multiplier Adder
In the four-multiplier adder configuration shown in
block can implement two four-multiplier adders (one four-multiplier
adder per half DSP block). These modes are useful for implementing
one-dimensional and two-dimensional filtering applications. The
four-multiplier adder is performed in two addition stages. The outputs of
two of the four multipliers are initially summed in the two first-stage
adder blocks. The results of these two adder blocks are then summed in
the second-stage adder block to produce the final four-multiplier adder
result, as shown by
Equation 5–2
and
Stratix III Device Handbook, Volume 1
Equation
DSP Blocks in Stratix III Devices
5–3.
Figure
5–17, the DSP
5–31
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