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Libraries are collections of designs and elements that allow us to implement bigger designs. In this video, we discuss the two most important libraries that any design must include: the work library and the IEEE library. The two could not be more different, and yet they are both libraries. The default data type for signals in VHDL is “bit”. Nobody uses this default type. Instead, the std_logic type is almost universally used. The way std_logic transcends a simple “1” and “0” type is important to understand because it informs a lot of the syntax we have to write later on.
