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1.8v SpartanIIE

This is a question related to input pin on 1.8V Spartan IIE. Datasheets said it is "5V tolerant with external resistor." What should the value of this external resistor be? What value in the datasheet are you based on to calculate the necessary voltage drop on this resistor? I am mainly a firmware person, just start looking into FPGAs... Thanks!

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CW
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100 Ohms... 
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Greg Deuerling
Fermi National Accelerator Laboratory
P.O.Box 500 MS368  Batavia, IL 60510
(630)840-4629     FAX  (630)840-5406
Electronic Systems Engineering Group
Work: egads_AT_fnal.gov, remove '_AT_'
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Egads

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Peter Alfke

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