Configuration Handbook - Kamami.pl

Device Configuration PinsTable 11–15. Dedicated Configuration Pins on the Stratix or Stratix GX Device (Part 8 of 8)Pin NameUser ModeConfigurationSchemePin TypeDescriptionnCS/CS I/O PPA Input Chip-select inputs. A low on nCS and a high onCS select the target device for configuration.The nCS and CS pins must be held activeduring configuration and initialization.During the PPA configuration mode, it is onlyrequired to use either the nCS or CS pin.Therefore, if only one chip-select input is used,the other must be tied to the active state. Forexample, nCS can be tied to GND while CS istoggled to control configuration.In non-PPAschemes, it functions as a user I/O duringconfiguration, which means it is tri-stated.After PPA configuration, nCS and CS areavailable as a user I/Os and the state of thesepins depends on the Dual-Purpose Pinsettings.RUnLUN/A if usingRemoteConfiguration;I/O if notRemoteConfigurationin FPP, PS orPPAInputInput that selects between remote update andlocal update. A logic high (1.5-V, 1.8-V, 2.5-V,3.3-V) selects remote update and a logic lowselects local update.When not using remote update or local updateconfiguration modes, this pins is available asgeneral-purpose user I/O pin.PGM[2..0]N/A if usingRemoteConfiguration;I/O if not usingRemoteConfigurationin FPP, PS orPPAInputThese output pins select one of eight pages inthe memory (either flash or enhancedconfiguration device) when using a remoteconfiguration mode.When not using remote update or local updateconfiguration modes, these pins are availableas general-purpose user I/O pins.11–58 Altera CorporationStratix Device Handbook, Volume 2 July 2005