Answers Database
Virtex SSO: how did we come up with the power/ground pairs in the Select IO application notes
Record #6902
Product Family: Hardware
Product Line: Virtex
Product Part: Virtex General Hardware
Problem Title:
Virtex SSO: how did we come up with the power/ground pairs in the Select IO application
notes
Problem Description:
Urgency: Standard
Problem Description:
How did we come up with the power/ground pairs numbers in the Select IO
application notes(Xilinx XAPP133)
What are the power/ground pair numbers for different Virtex packages
Solution 1:
The power and ground pair numbers for Virtex packages are estimates.
These numbers may not match with the actual Vcco and GND numbers for a
specific package. As the device size increases, the number of power and
gound pairs increases as well.
The application note serves a guideline on maximum amount of IOs can be switched
at the same time to avoid ground bounce. However, user's actual condition will have
a big effect on gound bounce.
End of Record #6902 - Last Modified: 10/06/99 10:19 |
