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Perhaps I'm too ambitious in my "design".
Really I'm an engineering student that wants to assembly his
final project of career.
I suppose that my prototype card (assembled in a 2 layers
PCB due to my limited resources) could not fulfill all the PCI specifications
and that I only must fulfill them in my final design (developed with a more
than 2 layers PCB).
In any case, I suppose that locating a decoupling capacitor in
each 3.3V and Vi/o pin I will make sure not damaging the PC in that I must prove
the board, isn't it?
In that case, what could be the maximum trace length from the PCI card edge connector to the capacitor? I also would like to know if the decoupling spec. are valid
for a 4 layers PCB or if, even in this case, I must use more than one capacitor
for all 3.3V and Vi/o pins.
in another order of things, I have seen an audio PCI board
that it did not have any capacitor to less than 0.5 inches of distance from the
PCI card edge connector. Do this means that the board uses all power pins?
If it is not thus, which could be the explanation (assuming that the board
fulfill the PCI specifications)?
Thanks
Iņigo Alvarez Ximenez de Embun
e-mail: patxipatxi@jazzfree.com |