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Altera_Forum
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13 years ago

the beginning of the my adventure with FPGA

hello every one i'm completely new in field of FPGA and VHDL or VERILOG programming... plz can some one tell me which one is worth to learn VHDL or VERILOG? any video tutorials or some useful ...
Altera_Forum's avatar
Altera_Forum
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13 years ago

no. millions of logic gates connected each other is not the best image of an fpga. The simplest element of an fpga is a truth table with 4 inputs and 1 output. It is called Look-Up Table ( LUT ). With this you can implement combinational circuits up to 4 inputs. Optionaly a flip-flop D can be connected to the output of the LUT, so you can make sequential synchronous circuits. The LUT with the D FF forms a Logic Element ( LE ). The fpga has thousands of LE with tracks that connect inputs and outputs of the LE and to the pins of the fpga.

With a lot of LEs you can design logic circuit with many inputs and outputs, very complex sequential circuits and state machines. I described a simplified diagram of a fpga. Actual fpga has many others elements: pll, embedded multipliers, high-speed interfaces, etc.