Configuration Handbook - Kamami.pl

Configuring Stratix II & Stratix II GX DevicesPS Configuration Using a MAX II Device as an External HostIn the PS configuration scheme, a MAX II device can be used as anintelligent host that controls the transfer of configuration data from astorage device, such as flash memory, to the target Stratix II orStratix II GX device. Configuration data can be stored in RBF, HEX, orTTF format. Figure 7–17 shows the configuration interface connectionsbetween a Stratix II or Stratix II GX device and a MAX II device for singledevice configuration.Figure 7–17. Single Device PS Configuration Using an External HostADDRMemoryDATA0(1) VCC VCC (1)10 kΩ 10 kΩStratix II DeviceCONF_DONEnSTATUSnCEExternal Host(MAX II Device orMicroprocessor)GNDDATA0nCONFIGDCLKnCEOMSEL3MSEL2MSEL1MSEL0N.C.V CCNote to Figure 7–17:(1) Connect the pull-up resistor to a supply that provides an acceptable input signal for the device. V CC should be highenough to meet the V IH specification of the I/O on the device and the external host.GNDUpon power-up, Stratix II and Stratix II GX devices go through a POR.The POR delay is dependent on the PORSEL pin setting; when PORSEL isdriven low, the POR time is approximately 100 ms, if PORSEL is drivenhigh, the POR time is approximately 12 ms. During POR, the deviceresets, holds nSTATUS low, and tri-states all user I/O pins. Once thedevice successfully exits POR, all user I/O pins continue to be tri-stated.If nIO_pullup is driven low during power-up and configuration, theuser I/O pins and dual-purpose I/O pins will have weak pull-upresistors which are on (after POR) before and during configuration. IfnIO_pullup is driven high, the weak pull-up resistors are disabled.1 You can hold nConfig low in order to stop deviceconfiguration.Altera Corporation 7–47May 2007 Stratix II Device Handbook, Volume 2