Altera PowerPlay Early Power Estimator - Manual (Page 47)

Altera Corporation 3–29
January 2007 PowerPlay Early Power Estimator For Stratix II, Stratix II GX & HardCopy II
Using the PowerPlay Early Power Estimator
Each row in the PLL section represents one or more PLLs in the device.
You need to enter the maximum output frequency and the VCO
frequency for each PLL. You must also specify whether each PLL is an
LVDS, fast or enhanced PLL.
Table 3–8 describes the values that need to
be entered in the PLL section of the PowerPlay Early Power Estimator.
Table 3–8. PLL Section Information
Column Heading Description
Module Enter a name for the PLL in this column. This is an optional value.
PLL Type Select whether the PLL is an LVDS, fast or enhanced PLL.
# PLL Blocks Enter the number of PLL blocks with the same specific output frequency and VCO
frequency combination.
# DPA Buses Enter the number of dynamic phase alignment (DPA) buses in use. DPA is only
available for LVDS PLLs.
Output Freq Enter the maximum output frequency (f
MAX
) of the PLL in MHz. The maximum
output frequency is reported in the PLL Usage column of the Quartus II Compilation
Report. In the Compilation Report, select Fitter, and click Resource Section.
Select PLL Usage, and click Output Frequency.
If there are multiple clock outputs from the PLL, choose the maximum output
frequency listed. The output frequency is the same as the VCO frequency for LVDS
PLLs used as part of a SERDES.
VCO Freq Enter the frequency of the voltage controlled oscillator in MHz. The VCO frequency
is reported in the Nominal VCO frequency row of the Quartus II Compilation Report.
In the Compilation Report, select Fitter, and click Resource Section. Select PLL
Summary, and click Nominal VCO frequency.
Total Power This shows the estimated power in W, based on the maximum output frequency
and the VCO frequency you entered. This value is calculated automatically.
User Comments Enter any comments. This is an optional entry.