hamster Posted July 2, 2014 Report Share Posted July 2, 2014 Did you know that the Spartan 6 has an internal RC Osc running at about 50MHz? Neither did I. It isn't really documented anywhere. However, here is how to get at it:STARTUP_SPARTAN6_inst : STARTUP_SPARTAN6 port map ( CFGCLK => open, -- 1-bit output: Configuration logic main clock output. CFGMCLK => test_signal, -- 1-bit output: Configuration internal oscillator clock output. EOS => open, -- 1-bit output: Active high output signal indicates the End Of Configuration. CLK => '0', -- 1-bit input: User startup-clock input GSR => '0', -- 1-bit input: Global Set/Reset input (GSR cannot be used for the port name) GTS => '0', -- 1-bit input: Global 3-state input (GTS cannot be used for the port name) KEYCLEARB => '0' -- 1-bit input: Clear AES Decrypter Key input from Battery-Backed RAM (BBRAM) ); Link to comment Share on other sites More sharing options...
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