Configuration Handbook - Kamami.pl

Configuration SchemesFigure 13–15. Multi-Device PS Configuration with a Download CableV CC (1)V CC (1)10 kΩ(3)V CC (1)10 kΩV CC (1)10-Pin Male Header(PS Mode)10 kΩ10 kΩ(3)V CC (1)GNDV CC (4)Cyclone FPGA 1CONF_DONEnSTATUSMSEL0DCLKMSEL1nCEDATA0 nCEOnCONFIG10 kΩPin 1GNDV CCGNDVIO (2)V CCCyclone FPGA 2MSEL0MSEL1CONF_DONEnSTATUSDCLKGNDnCEnCEON.C.DATA0nCONFIGNotes to Figure 13–15:(1) You should connect the pull-up resistor to the same supply voltage as the MasterBlaster (VIO pin) or ByteBlasterMVcable.(2) V IO is a reference voltage for the MasterBlaster output driver. V IO should match the device’s V CCIO . Refer to theMasterBlaster Serial/USB Communications Cable Data Sheet for this value.(3) The pull-up resistors on DATA0 and DCLK are only needed if the download cable is the only configuration schemeused on your board. This is to ensure that DATA0 and DCLK are not left floating after configuration. For example, ifyou are also using a configuration device, the pull-up resistors on DATA0 and DCLK are not needed.(4) Connect MSEL0 to the V CC supply voltage of the I/O bank it resides in.If you are using a ByteBlaster II, MasterBlaster, or ByteBlasterMV cable toconfigure device(s) on a board that also is populated with configurationdevices, you should electrically isolate the configuration devices from thetarget device(s) and cable. One way to isolate the configuration devices isto add logic, such as a multiplexer, that can select between theconfiguration devices and the cable. The multiplexer allows bidirectionaltransfers on the nSTATUS and CONF_DONE signals. Another option is toadd switches to the five common signals (CONF_DONE, nSTATUS, DCLK,13–26 Altera CorporationCyclone Device Handbook, Volume 1 January 2007