Answers Database
Virtex Configuration: What is the status of user I/O during configuration?
Record #5108
Product Family: Hardware
Product Line: Virtex
Product Part: Virtex General Hardware
Problem Title:
Virtex Configuration: What is the status of user I/O during configuration?
Problem Description:
Urgency: Standard
General Description
What is the status of Virtex user I/O during configuration
and the status of unused I/O after configuration?
Solution 1:
Virtex I/O are tri-stated during configuration.
By default, no pullup or pulldown is present on Virtex I/O during
configuration. However, preconfiguration pullups may be selected with optional Mode Pin values. Ple
ase consult the Virtex Datasheet for more details.
After configuration of Virtex series FPGAs, the unused I/O are configured with OBUFT_S_12, which is
tri-stated with a weak pulldown.
End of Record #5108 - Last Modified: 06/26/99 13:16 |
