my design using asynchronization FIFO simulated successfully in syste generator, but when i put the design's ngc file into a black box and us modelsim to co-simulate it, the outputs are all 'U'. why?
my design using asynchronization FIFO simulated successfully in syste generator, but when i put the design's ngc file into a black box and us modelsim to co-simulate it, the outputs are all 'U'. why?
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