What is the Slew Rate VALUE of Cyclone IV?

hie xiaoyi594,

i think your original question was on the value of this slew rate. E.g. dv/dt in V/ns.

bfkstimchan gave a very helpful comment, referring to the IBIS model.

let me add on how i get this info.

you can get a good idea of this "value" by referring to the RAMP (dv/dt) section of the I/O standard.

i attached a screenshot example of how you would check this in your IBIS file.

https://www.alteraforum.com/forum/attachment.php?attachmentid=10666

of cos just download the IBIS model from the link below for your device:

https://www.altera.com/support/support-resources/download/board-layout-test/ibis/ibs-ibis_index.html

good luck!