Honored Contributor
Honored ContributorThis is what they say about interfacing a CIII device for AS or PS configuration. And it's confusing reading this thread which kinda suggest to use 2.5 V :rolleyes:
http://www.altera.com/support/kdb/solutions/rd10152007_741.html Solution ID: rd10152007_741 Last Modified: Oct 30, 2007 Product Category: Devices Product Area: Configuration Product Sub-area: Active Serial (AS)problem How do I interface a Cyclone® III device with its configuration device in Active Serial or Active Parallel configuration scheme? solution in an active serial (as) configuration scheme for cyclone iii device, the vccio of i/o bank 1 must be 3.3v. In an Active Parallel (AP) configuration scheme for Cyclone III device, the VCCIO of banks 1, 6, 7 and 8 must be the same and must be either 1.8, 2.5, 3.0 or 3.3V. altera® recommends that you do not use level shifters between a configuration device and the cyclone iii device in any active (as or ap) configuration scheme. Can someone please clarify this. I wanna use the scheme in figure 10-29 :eek:
