Field programmable logic gate array FPGA

Field programmable logic gate array

（ English ：

Field Programmable Gate Array

, Abbreviation for

FPGA

）, It uses

、

、

etc.

Developed for the technological foundation . As

A semi custom circuit in , It makes up for

Insufficient circuit , And overcome the original

The disadvantage of limited number of gate circuits .

At present

（

or

） Describe the logic circuit , You can use

and

、

Tool software , Quickly burn to FPGA Test on , This process is modern

Technology mainstream . These programmable logic elements can be used to realize some basic

（ such as

、

、

、

） Or more complex combinational logic functions , Such as decoder . In most of FPGA Inside , These editable components also include memory components , for example

（Flip－flop） Or other more complete memory blocks , So as to constitute

.

The system designer can , Through editable connection , hold FPGA The internal logic blocks are connected together . It's like a circuit test board is placed in a chip . A finished product from the factory FPGA The logical blocks and connections of can be changed according to the needs of the designer , therefore FPGA Can complete the required logic function .

FPGA Generally speaking, it's better than

（ASIC） It's slower , Unable to complete more complex design , And it will consume more electric energy . however ,FPGA It has many advantages , For example, it can be finished quickly , And its internal logic can be repeatedly modified by designers , So as to correct the errors in the program , Besides , Use FPGA The cost of debugging is low . Manufacturers may also offer cheap 、 But the editing ability is limited FPGA product . Because some of these chips have poor editable ability , So the development of these designs is in common FPGA The complete , Then the design is transferred to a chip similar to the application specific integrated circuit . In some industries with relatively fast technological updates ,FPGA It is almost a necessary part of an electronic system , Because before mass supply , We must seize the market quickly , At this time FPGA The advantage of convenience and flexibility is very important .