Altera Cyclone II PowerPlay Early Power Estimator - Manual (Page 35)

Altera Corporation 3–19
May 2006 PowerPlay Early Power Estimator User Guide For Cyclone II FPGAs
Using the Cyclone II PowerPlay Early Power Estimator
the I/O standard, I/O bank, and I/O bank V
CCIO
correspond correctly for
a design module, the V
CCIO
Check value shows OK. If there is a
discrepancy, the V
CCIO
Check value shows FAIL?.
1 Importing the Quartus II estimation file automatically populates
the V
CCIO
voltages. However, certain designs may have
discrepancies. This occurs most often if I/O standards that are
listed as different voltages in the PowerPlay Early Power
Estimator spreadsheet can actually be in the same I/O bank on
the device.
f
For more information on I/O standard guidelines, see the Selectable I/O
Standards in Cyclone II Devices chapter in volume 1 of the Cyclone II Device
Handbook. If there are discrepancies between the V
CCIO
voltages in banks,
the PowerPlay Early Power Estimator spreadsheet displays the
following message:
*** Bank and I/O voltage selection inconsistent with I/O bank
voltage. See ‘Bank Voltage Check’ column.***
Ensure that the correct V
CCIO
is selected for the bank.
Figure 3–15 shows an example of the Output Pins report in the Quartus II
software Compilation Report for a design targeting a Cyclone II device.
The Compilation Report lists the I/O standard used on each pin.
Figure 3–12 shows the Cyclone II PowerPlay Early Power Estimator
spreadsheet and the estimated power consumed by the I/O pins.
Figure 3–15. Output Pins Report in Compilation Report