Hi Steven,
Thankyou for your answers.
I have another doubt: At XILINX web site we have: TQ144 PQ208 FT256 XC3S200-4 $15.10 $20.25 $25.55 XC3S400-4 $22.00 $25.50 $27.00
I know these prices are for small quantities but, why the package has so different impact for the two components?
69.2% from TQ144 to FT256 on XC3S200, and
22.7% from TQ144 to FT256 on XC3S400! Note that both components use all available pins/balls in all mentioned packages.
If we need a lot of pins, it looks like using two XC3S200-TQ144 is better than using one XC3S200-FT256. Some more pins, double the logic, more components = better discount! I know some facts are missing, but I really never understood why this huge price difference.
Can we expect the same behavior for SPARTAN3E (XC3S250E to XC3S500E) ?
Luiz Carlos