IRVS VLSI IDEA INNOVATORS

IRVS VLSI IDEA INNOVATORS
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Wednesday, September 29, 2010

Library

• It is a collection of compiled VHDL units.

• It enables sharing of compiled designs and hides the source code from the users.

• Commonly used functions, procedures and user data types can be compiled into a user defined library for use with all designs.

• Library should be declared before each entity declaration even if it is in the same VHDL file.

• To declare a library (i.e. to make it visible to the design) two lines of code are needed , one containing name of the library, the other a use clause.

• A library structure can be as follows:



Library syntax



Example



Library details




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