VLSI design and implementation of INTEL 8253IC using VHDL

VLSI technology allows a designer to implement a complex design in software and perform a series of simulation on it, before sending the design for actual fabrication. Hence the time involved in testing the design is reduced. Any error would enable the designer to make changes in the design, rate it on the simulator before sending it for fabrication, thus reducing error. The design is specified to the simulator in various ways. In this paper a popular method is used, a hardware description language VHDL designs technique to implement the entire functionality of the INTEL 8253 programmable interval timer.