Configuration Handbook - Kamami.pl

Fast Passive Parallel ConfigurationFigure 6–22. Multiple-Device FPP Configuration Using a Microprocessor When Both FPGAs Receive theSame DataMemoryADDRDATA[7..0]V CC (1)V CC (1)1 kΩ 1 kΩAPEX II DeviceV CCAPEX II DeviceV CCMicroprocessorGNDMSEL1MSEL0CONF_DONEnSTATUSnCEDATA[7..0]nCEOGNDN.C. (2)GNDMSEL1MSEL0CONF_DONEnSTATUSnCEDATA[7..0]nCEOGNDN.C. (2)nCONFIGDCLKnCONFIGDCLKNotes to Figure 6–22:(1) The pull-up resistor should be connected to a supply that provides an acceptable input signal for all devices in thechain.(2) The nCEO pins of both devices are left unconnected when configuring the same configuration data into multipledevices.You can use a single configuration chain to configure APEX II deviceswith other Altera devices that support FPP configuration, such as Stratix.To ensure that all devices in the chain complete configuration at the sametime or that an error flagged by one device initiates reconfiguration in alldevices, all of the device CONF_DONE and nSTATUS pins must be tiedtogether.fFor more information on configuring multiple Altera devices in the sameconfiguration chain, refer to Configuring Mixed Altera FPGA Chains in theConfiguration Handbook.Figure 6–23 shows the timing waveform for the FPP configurationscheme using a microprocessor.6–44 Altera CorporationConfiguration Handbook, Volume 1 August 2005