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Altera_Forum
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19 years ago

Need ideas on solving a weird LAN91C111 problem

I have a dual processor design with two /f cores. One processor, cpu_fifo, pulls data out of a fifo that is filled by a VHDL block receiving data from some proto pins. It copies the data into a share...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

Are you crossing clock domains? Running one component at 50MHz and another at 100MHz? If so this is going to kill your performance because the SOPC builder has to instantiate clock synchronization logic. It takes several clock cycles to pass data through the clock arbitrators.