Synthesizing VHDL delays [noob]

May 25, 2006 2 Replies

Hi!



I have a question regarding the VHDL's "after" keyword. I've read that it is not synthesizable but only used for simulation and I was wondering if this is true for real-world programs. I'm working with Xilinx Spartan-2 (so it's Xilinx's systhesizer in question) and I've connected a soft processor to an external memory chip via my VHDL memory controller but the design isn't working if I deselect CS at the end of a cycle. I attempted to create delays using afters, ie. "CS


after is only simulation you must use some clocked process from some clock to generate the required timing antti

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