Configuration Handbook - Kamami.pl

Configuring Mercury, APEX 20K (2.5 V), ACEX 1K & FLEX 10K DevicesFigure 8–18. Multiple-Device PPS Configuration Using a Microprocessor When Both FPGAs Receive theSame DataV CC V CC(1) 1 kΩ 1 kΩ (1)MemoryADDR DATA[7..0]MicroprocessorGNDAPEX 20K (2.5-V),ACEX 1K, Mercury, orFLEX 10K Device 1MSELOGNDAPEX 20K (2.5-V),ACEX 1K, Mercury, orFLEX 10K Device 2MSELOV CCV CCMSEL 1 MSEL 1CONF_DONECONF_DONEnSTATUSnSTATUSnCE nCEOnCEnCEOGNDDATA[7..0]N.C. GNDDATA[7..0]N.C.DCLKDCLKnCONFIGnCONFIGNotes to Figure 8–18:(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 Mercury, APEX 20K(2.5 V), ACEX 1K or FLEX 10KE devices with other Altera devices thatsupport PPS configuration, such as APEX 20KE devices. To ensure that alldevices in the chain complete configuration at the same time or that anerror flagged by one device initiates reconfiguration in all devices, all ofthe device CONF_DONE and nSTATUS pins must be tied together.fFor more information on configuring multiple Altera devices in the sameconfiguration chain, refer to Configuring Mixed Altera FPGA Chainschapter 8 in volume 2 of the Configuration Handbook.Figure 8–19 shows the timing waveform for the PPS configurationscheme using a microprocessor.Altera Corporation 8–41August 2005 Configuration Handbook, Volume 1