Altera PowerPlay Early Power Estimator - Manual (Page 30)

DSP Worksheet
Each row in the DSP section represents a DSP design module where all instances of the module have the
same configuration, clock frequency, toggle percentage, and register usage. If some (or all) DSP or
multiplier instances have different configurations, you must enter the information in different rows.
Specify the following information for each DSP or multiplier module:
• Configuration
• Number of instances
• Clock frequency (in MHz)
• Toggle percentage of the data outputs
• Inputs and outputs that are registered or not
• Module pipelined or not
Figure 3-16: DSP Worksheet of the PowerPlay EPE Spreadsheet
Table 3-7: DSP Worksheet Information
Column Heading Description
Module Enter a name for the DSP module in this column. This is an optional
value.
Configuration Select the DSP block configuration for the module.
# of Instances
Enter the number of DSP block instances that have the same configura‐
tion, clock frequency, toggle percentage, and register usage. This value
is independent of the number of dedicated DSP blocks you use.
For example, it is possible to use four 9 × 9 simple multipliers that are
implemented in the same DSP block in the FPGA devices. In this case,
the number of instances would be four.
To determine the maximum number of instances you can fit in the
device for any particular mode, follow these steps:
1. Open the “DSP Blocks”, “Variable Precision DSP Blocks”, or
“Embedded Multipliers” chapter of the respective device handbook.
2. In the “Number of DSP Blocks” table, take the maximum number of
DSP blocks available in the device for the mode of operation.
3. Divide the maximum number by the “# of Mults” for that mode of
operation from the “DSP Block Operation Modes” table.
4. Use the resulting value for the “# of Instances” in the PowerPlay
EPE spreadsheet.
3-20 DSP Worksheet
UG-01070
2015.01.20
Altera Corporation PowerPlay Early Power Estimator Worksheets
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