I am trying to acquire a databus (12 bits) from an A/D converter
(with sample rate configured at 50MHz) using SPARTAN IIe and IO buffer configured as LVTTL (SLEW) in the input pins of UCF file (ISE 6.1i).
Is the LVTTL (SLEW) IOB fast enough to be activated by the databus
at 50Mhz ?
Or I should replace the LVTTL IOB type for another one available...
In other hands, what is the best IOB choice for this case?
A fundamental question is what is the voltage level presented by the A/D on the bus? Spartan IIe is fast enough to sample data at high rate such as 50MHz but the I/O level configured in UCF must match the external device.
I am trying to acquire a databus (12 bits) from an A/D converter
(with sample rate configured at 50MHz) using SPARTAN IIe and IO buffer configured as LVTTL (SLEW) in the input pins of UCF file (ISE 6.1i).
Is the LVTTL (SLEW) IOB fast enough to be activated by the databus
at 50Mhz ?
Or I should replace the LVTTL IOB type for another one available...
In other hands, what is the best IOB choice for this case?