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Virtex: Are the internal Tristate outputs pullup, pulldown or high-Z?
Record #8156
Problem Title:
Virtex: Are the internal Tristate outputs pullup, pulldown or high-Z?
Problem Description:
Urgency: Standard
General Description: Are the internal Tristates pullup, pulldown or floating?
Solution 1:
The Tristate outputs are pulled up, if none of the buffers are enabled then the output is a 1.
For correct simulation results you should use a PULLUP. The simulation model is simple a tri-state b
uffer and would not represent the pullup unless it is instantiated into your desig
End of Record #8156 - Last Modified: 11/29/99 12:44 |
