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VHDL (VHSIC (Very High Speed Integrated Circuit) Hardware Description Language) is a hardware description language used in electronic design automation to describe and design digital systems such as field-programmable gate arrays and integrated circuits.

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VHDL: Signals get U value even though there is another value assigned

I’m implementing IDEA algorithm using VHDL, I have a problem in my keygenerator module, when I run the simulator I get values U in all of the signals even though I assign other values to them. …
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