Altera Cyclone II PowerPlay Early Power Estimator Manuale Utente Pagina 30

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3–14 Altera Corporation
PowerPlay Early Power Estimator User Guide For Cyclone II FPGAs May 2006
PowerPlay Early Power Estimator Spreadsheet Inputs
Figure 3–10. I/O Power Representation
The V
REF
pins consume minimal current (less than 10 μA) and is
negligible when compared to the power consumed by the general
purpose I/O pins. Therefore, the PowerPlay Early Power Estimator
spreadsheet does not include the current for V
REF
pins in the calculations.
Each row in the I/O section represents a design module where the I/O
pins have the same frequency, toggle percentage, average capacitive load,
I/O standard, data rate, and I/O bank. You must enter the following
parameters for each design module:
I/O standard
Clock frequency (f
MAX
) in MHz
Number of output, input, and bidirectional pins
I/O bank
Pin toggle percentage
Output enable percentage
Average capacitance of the load
I/O data rate
V
CCINT
V
CCIO
I
CCINT
I
CCIO
Thermal P
INT
Thermal P
IO
External P
IO
Cyclone II Device
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