Configuration Handbook - Kamami.pl

Active Serial Configuration (Serial Configuration Devices)Figure 7–11 shows the timing waveform for the FPP configurationscheme using an enhanced configuration device.Figure 7–11. Stratix II & Stratix II GX FPP Configuration Using an Enhanced Configuration Device TimingWaveformnINIT_CONF orVCC/nCONFIGt LOEOE/nSTATUSnCS/CONF_DONEt CEt HCt LCDCLKDATA[7..0]User I/OINIT_DONEDriven Highbyte1byte2bytent OETri-StateTri-StateUser Modet CD2UM (1)Note to Figure 7–11:(1) The initialization clock can come from the Stratix II or Stratix II GX device’s internal oscillator or the CLKUSR pin.ffFor timing information, refer to the Enhanced Configuration Devices(EPC4, EPC8 & EPC16) Data Sheet in the Configuration Handbook.Device configuration options and how to create configuration files arediscussed further in the Software Settings section in of the ConfigurationHandbook.Active SerialConfiguration(SerialConfigurationDevices)In the AS configuration scheme, Stratix II and Stratix II GX devices areconfigured using a serial configuration device. These configurationdevices are low-cost devices with non-volatile memory that feature asimple four-pin interface and a small form factor. These features makeserial configuration devices an ideal low-cost configuration solution.Note that AS mode is only applicable for 3.3-V configurations. If I/Obank 3 is less than 3.3 V, level shifters are required on the output pins(DCLK, nCSO, ASDO) from the Stratix II or Stratix II GX device back to theEPCS device.1 If VCCIO in bank 3 is set to 1.8 V, an external voltage leveltranslator is needed to meet the V IH of the EPCS device (3.3 V).fFor more information on serial configuration devices, refer to the SerialConfiguration Devices Data Sheet in the Configuration Handbook.7–34 Altera CorporationStratix II Device Handbook, Volume 2 May 2007