Answers Database

XC9500: Power consumption/dissipation information


Record #1480

Product Family:  Hardware

Product Line:  9500

Problem Title:
XC9500: Power consumption/dissipation information


Problem Description:
Operating current for an XC9500 design can be approximated
for specific operating conditions using the following
equation :

Icc(mA)=MChp (1.7) + MClp (0.9) + MC (0.006 mA/MHz) f

Where :

MChp = Macrocells in high-performance mode

MClp = Macrocells in low-power mode

MC = Total number of macrocells used

f = clock frequency

Power dissipation can be reduced in the XC9500 by configuring
macrocells to standard or low-power modes of operation.
Unused macrocells are turned off to minimize power dissipation.

Typical Icc vs. Frequency graphs are available for the various
XC9500 devices in Chapter 3 of the 1996 Xilinx Programmable Logic
Data Book.
Please refer to this chapter for more information on low-power
mode as well as additional information on the specific XC9500
device you are targeting.



Solution 1:





Solution 2:

To obtain power, multiply Vccint by Icc
for the sake of overall power, the i/o voltages are
negligible with respect to the power calculation.



End of Record #1480