Which? 5V, or LVTTL? They are two different things.
IIRC, Spartan-6 does support LVTTL. It does not support 5V I/O
directly.
Reply by austin●April 9, 20102010-04-09
a,
If it is not in the data sheet, then it isn't supported.
I have no idea what "multi-point" LVDS is: sounds like someone's idea
of how to ruin a perfectly good point to point IEEE standard!
OK, I just read about it on Wikipedia, and that confirms my
suspicions ...
There is the "bus-LVDS" which we 'invented' and supported, but the
signal integrity of that is a compromise at best, and I have never
really liked to deal with it at all. Regardless, it does work (within
its limits).
For 5v tolerance, I suggest level shifters, or using resistors. At
these advanced technology nodes we are lucky to be able to still use
3.3v IO!
Austin
Reply by ajpanicker●April 9, 20102010-04-09
Does the Spartan-6 LX family or Spartan3A support the Multipoint-LVDS
specifications?
We need input and ouput buffers compliant to M-LVDS type1 and types
2.
Also , the buffers should be 5V LVTTL tolerant.