Configuration Handbook - Kamami.pl

Device Configuration PinsDeviceConfigurationPinsTables 13–10 through 13–12 describe the connections and functionality ofall the configuration related pins on the Cyclone device. Table 13–10describes the dedicated configuration pins. These pins are required to beconnected properly on your board for successful configuration. Some ofthese pins may not be required for your configuration schemes.Table 13–10. Dedicated Cyclone Device Configuration Pins (Part 1 of 3)Pin NameMSEL1MSEL0UserModeConfigurationSchemePin TypeDescription– All Input Two-bit configuration input that set the Cyclonedevice configuration scheme (see Table 13–2). Usethese pins to select the Cyclone configurationschemes for the appropriate connections. These pinsmust remain at a valid state during power-up beforenCONFIG is pulled low to initiate a reconfigurationand during configuration. This pin uses Schmitt triggerinput buffers.nCONFIG – All Input Configuration control input. Pulling this pin low duringuser-mode causes the FPGA to lose its configurationdata, enter a reset state, and tri-state all I/O pins.Returning this pin to a logic high initiates areconfiguration. If the configuration scheme uses anenhanced configuration device or EPC2 device, thenCONFIG pin can be tied directly to V CC or to theconfiguration device's nINIT_CONF pin. This pinuses Schmitt trigger input buffers13–46 Altera CorporationCyclone Device Handbook, Volume 1 January 2007