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Field-programmable gate arrays (FPGAs) are computer chips that can be programmed after purchase. They contain thousands of customizable gates, or logical blocks, generated through software. FPGAs can have both analog and digital elements and are connected by a network of wires. Programming an FPGA involves outlining the logic function in text or visual files and downloading it into the software. While more expensive than wired logic chips, FPGAs can save resources by meeting specific needs and being easier to use. They are an alternative to application-specific integrated circuits (ASICs).
A field-programmable gate array (FPGA) is a computer logic chip that is not wired by the manufacturer. This means it can be programmed after purchase. There are thousands of customization options available on a typical FPGA. These programmable entities are gates, also known as logical blocks or lookup table files (LUTs).
Since the number of logic blocks on an FPGA is too large to create manually, they are generated through a software program. Programmers can then choose from a variety of categories to customize them for a particular system. They can use their own programs to interact with the program on the FPGA chip and make the changes.
When programming an FPGA, several interconnected elements can be used to configure the logic blocks as needed. The content of LUTs varies depending on how they are programmed. Some perform single functions while others are capable of performing a number of more complex tasks. Some FPGAs may also contain both analog and digital elements. These chips also often have the ability to allow these elements to work together.
The LUTs are connected by a network of wires. Depending on the function required, the threads can travel the rows in straight lines or in a more complex network of diagonal links. A LUT can be linked to several other files via multiple connections. Files can also be connected by a series of threads called carries or dedicated routing chains that help move only certain types of information so it can be processed faster.
To program a logic function with an FPGA, it must first be outlined in text or visual files. Then the information is downloaded into the software that comes with the FPGA. Once this process is complete, the function is usually operational.
While an FPGA is more expensive than a wired logic chip, it can help save resources as users can program to meet their specific needs. This can reduce the need for extra work and the additional time required to accommodate a non-custom made chip. A programmable chip may also be easier to use, as its user functions, such as menus, can be customized.
Field programmable port array circuits are an alternative to the application specific integrated circuit (ASIC). These circuits are wired before leaving the factory. They are board-level components, as opposed to field-programmable gate-level elements.
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