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Multiplier blocks – Altera Cyclone II PowerPlay Early Power Estimator User Manual

Page 27

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Altera Corporation

3–11

May 2006

PowerPlay Early Power Estimator User Guide For Cyclone II FPGAs

Using the Cyclone II PowerPlay Early Power Estimator

Figure 3–8. RAM Section in the PowerPlay Early Power Estimator Spreadsheet

Multiplier Blocks

Cyclone II devices implement DSP functions in embedded multipliers.
These embedded multiplier blocks are optimized for multiplier-intensive
low-cost (DSP) applications. The Multiplier section in the Cyclone II
PowerPlay Early Power Estimator spreadsheet provides power
information for Cyclone II multiplier blocks.

Each row in the Multiplier section represents a multiplier design module
where all instances of the module have the same configuration, clock
frequency, toggle percentage and register usage. If some (or all) multiplier
instances have different configurations, you need to enter the information
in different rows. You must enter the following information for each
multiplier module:

Configuration

Clock frequency (f

MAX

) in MHz

Number of instances

Toggle percentage of the data outputs

Whether or not the inputs and outputs are registered

f

For more information on Cyclone II embedded multiplier
configurations, see the Embedded Multipliers in Cyclone II Devices chapter
in Volume 1 of the Cyclone II Device Handbook.