Field-programmable gate array: Difference between revisions

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More recently, [[OpenCL]] (Open Computing Language) is being used by programmers to take advantage of the performance and power efficiencies that FPGAs provide. OpenCL allows programmers to develop code in the [[C programming language]].<ref>{{cite web|url=http://streamcomputing.eu/blog/2014-09-16/use-opencl-fpgas/|title=Why use OpenCL on FPGAs?|work=StreamComputing|date=2014-09-16|access-date=2015-07-17|archive-date=2017-01-01|archive-url=https://web.archive.org/web/20170101125857/https://streamcomputing.eu/blog/2014-09-16/use-opencl-fpgas/|url-status=dead}}</ref> For further information, see [[high-level synthesis]] and [[C to HDL]].

Most FPGAs rely on an [[static random-access memory|SRAM]]-based approach to be programmed. These FPGAs are in-system programmable and re-programmable, but require external boot devices. For example, [[flash memory]] or [[EEPROM]] devices may load contents into internal SRAM that controls routing and logic. The SRAM approach is based on [[CMOS]].<!--[[User:Kvng/RTH]]-->

Rarer alternatives to the SRAM approach include:

* [[Fuse (electrical)|Fuse]]: one-time programmable. Bipolar. Obsolete.

* [[Antifuse]]: one-time programmable. CMOS. Examples: Actel SX and Axcelerator families; Quicklogic Eclipse II family.<ref name=EDN>{{cite web|url=https://www.edn.com/all-about-fpgas/|title=All about FPGAs|date=21 March 2006 }}</ref>

* [[Programmable read-only memory|PROM]]: programmable read-only memory technology. One-time programmable because of plastic packaging.{{clarify|reason=What's the issue with plastic packages?}} Obsolete.

* [[EPROM]]: erasable programmable read-only memory technology. One-time programmable but with window, can be erased with ultraviolet (UV) light. CMOS. Obsolete.

* [[EEPROM]]: electrically erasable programmable read-only memory technology. Can be erased, even in plastic packages. Some but not all EEPROM devices can be in-system programmed. CMOS.

* [[Flash memory|Flash]]: flash-erase EPROM technology. Can be erased, even in plastic packages. Some but not all flash devices can be in-system programmed. Usually, a flash cell is smaller than an equivalent EEPROM cell and is, therefore, less expensive to manufacture. CMOS. Example: Actel ProASIC family.<ref name=EDN/><!--[[User:Kvng/RTH]]-->

== Manufacturers ==