Forum Discussion

Honored Contributor

15 years ago

ALT_INBUF_DIFF in cycloneII

is possible in cycloneII device use 2 pins INPUT for differential rs422 signal? In quartus2 the differential buffer for cyclone2 is not allowed!

Honored Contributor

15 years ago

ok.. i try it!

the vccio is connected at 3.3V power supply..

in quartus2 i set 2 pins in lvds mode..

all other pins will be set to 2.5V (for delete fitter error in compilation).

if i set other out-pins at 2.5V, but i connect vccio at 3,3V, can i demage the device?

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"I don't know what happens when you set Vccio to 2V5 "

can i set in quartus the value of Vccio power? where?

best regards