Best clock output pin in Spartan-3
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From: apalopohapa on 14 Dec 2009 12:53 Hello. I am using a global buffer input as clock input, the signal then goes through a DCM, and I need to output the inverted clock through a pin into another chip. Can I use any pin for this clock output or are there specific pins that better serve this purpose? Thanks.
From: austin on 14 Dec 2009 13:42 a, Any pin will function. "Better" is a relative term: there are pins with less delay from the pad on the die to the pin on the package, would you call this better? If this is what you want (the shortest delay), you need to look at the delay from the pad to the pin in the package. This delay is commonly called "flight-time." Austin
From: Nico Coesel on 15 Dec 2009 14:16
"apalopohapa" <mr.arango(a)gmail.com> wrote: >Hello. > >I am using a global buffer input as clock input, the signal then goes >through a DCM, and I need to output the inverted clock through a pin into >another chip. Can I use any pin for this clock output or are there >specific pins that better serve this purpose? You can use any pin. Its best to use a DDR flipflop in the IOB. -- Failure does not prove something is impossible, failure simply indicates you are not using the right tools... "If it doesn't fit, use a bigger hammer!" -------------------------------------------------------------- |