Altera PowerPlay Early Power Estimator User Manual

Page 40

3–22

Altera

Corporation

PowerPlay Early Power Estimator For Stratix II, Stratix II GX & HardCopy II

January 2007

PowerPlay Early Power Estimator Inputs

Data Rate

Select either SDR or DDR as the I/O data rate. This indicates whether the I/O value is
updated once (SDR) or twice (DDR) a cycle. If the data rate of the pin is DDR, it is
possible to set the data rate to SDR and double the toggle percentage. The Quartus II
software often uses this method to output information.

Bank I/O Std Check

This indicates whether the selected I/O standard is available on the selected I/O bank.
Not all I/O banks can implement every I/O standard.

Bank Voltage Check

This indicates whether or not the selected I/O bank has a voltage compatible with the
selected I/O standard.

Thermal Power (W),
Routing

This shows the power dissipation due to estimated routing (in W).

Routing power is highly dependent on placement and routing, which is itself a function
of design complexity. The values shown are representative of routing power based on
experimentation on over 100 real-world designs.

Use the Quartus II PowerPlay Power Analyzer for detailed analysis based on the
routing used in your design. This value is calculated automatically.

Thermal Power (W),
Block

This shows the power dissipation due to internal and load toggling of the I/O (in W).

Use the Quartus II PowerPlay Power Analyzer for accurate analysis based on the
exact I/O configuration of your design. This value is calculated automatically.

Thermal Power (W),
Total

This shows the total power dissipation (in W). The total power dissipation is the sum
of the routing and block power. This value is calculated automatically.

Supply Current (A),
I

C C I N T

This shows the current drawn from the I

CCINT

rail. Powers internal digital circuitry and

routing.This value is calculated automatically.

Supply Current (A),
I

C C P D

This shows the current drawn from the V

CCPD

rail. This rail powers the pre-drive

circuitry and operates at 3.3 V. This value is calculated automatically.

Supply Current (A),
I

C C I O

This shows the current drawn from this bank's V

CCIO

rail. Some of this current may be

drawn into off-chip termination resistors. This value is calculated automatically.