As far as I read it this is completely unclear in the data sheet, It states the inputs are schmitt and the hysteresis is 200mV for Vccio=3.3V BUT it fails to mention what the resulting VIL/VIH thresholds actually are! Does anybody know ?
As I am trying to debug the usual byte-blaster/FPGA non communication problem it would be useful to know. Vccio for all banks is 3.3V & byte blaster pin 4 is Vcca (2.5V) whilst the driving device is a 74HC244.
Thank you for your reply, that is the point of the question, that document DOES NOT specify VIH & VIL for the schmitt input!
On page 12 it says there will be 200mV of hysteresis at 3.3V but FAILS to specify the resulting VIH & VIL.
So perhaps someone could answer the question please ?