Purpose of IEEE library in
VHDL
By
Srujana Aramalla
Instructor: Dr.Albert B. Grubbs
Design File
It is an ASCII file containing VHDL
source.
A compiled design unit is stored in a design
library.
Each design library has a logical name with
which it is referenced inside a VHDL
description.
IEEE standards (Brief history)
IEEE 1076
IEEE 1164
IEEE 1076.3
IEEE 1076.4
IEEE design library
Contains the package STD_LOGIC_1164, which
defines a nine-value logic type and its associated
overloading functions and other utilities.
Parts of the IEEE library can be included in an
entity by inserting lines like these before entity
declaration:
library ieee;
use ieee.std_logic_1164.all;
References
IEEE Standard Multivalue Logic System for
VHDL Model Interoperability (Std_Logic_1164),
Sdt 1164-1993, IEEE, Piscataway, 1993.
IEEE, IEEE Standard VHDL Language Reference
Manual, IEEE Std 1076-1993, The Institute of
Electrical and Electronics Engineers, 1993.
J. Bhasker, “VHDL Primer,” 3rd Edition, Prentice
Hall, Upper Saddle River, 1998.