From the 70, has carried out the development of micorelectrónica creating new technologies to achieve developmental, but it was not until 1980 that the Ferranti company engineers began to explore the advantages of the IC design of a configurable and customizable for a particular system or application beyond using standard integrated circuits [2]. Creates microelectronics the pace at which the implementation of IC's standard logic functions can be achieved using one or more IC's configurable. As the VLSI (Very Low Scale Integration) makes it possible to build a system with many smaller components can be combined in many IC's standards within a configurable IC.
company Ferranti Ukraine [3] was the first to produce the first gate arrays. The adaptation of the arrangement is changed occurs when the metal interconnection mask. The ULA (Uncommitted Logic Array) regarded as one of the first IC'ssemiconfigurables developed, initially had a few hundred gates then extend the gamma and make other models that include elements of RAM.
Types and construction of the ASIC's
These IC's are made on a wafer of silicon a few microns thick, each wafer holds a few hundred IC's called dead [4]. Transistors and wiring are made of many layers whose number is between about 10 and 15 all different from one another, arranged one above the other and interconnected as required. Each layer has a pattern that is defined using a mask similar to a photo slide. The first half of the layers defined transistors and the second half of the interconnections between them.
Some of the most prominent types of ASIC's which will be described later are
- fully configurable.
- Semiconfigurables.
- programmable devices.
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