2 Input LUT

Programmable Logic. Can function as any 2 input logic gate and more. LUT stands for "Look Up Table". 2 top logic signals are the inputs. 4 bottom logic signals are the program. Here is a programming list for simplicity. AND -> 0001 NAND -> 1110 OR -> 0111 NOR -> 1000 XOR -> 0110 XNOR -> 1001 NOT (Left Input) -> 0101 And anything else How does it work? 3 Multiplexers that funnel to 1 output Where is it used? Luts are used in programmable hardware like GLAs, CPLDs, FPGAs and way more Pros Can preform different tasks without changing the hardware. Cons Surface area, propagation delays, and storing the program in some form of memory Why make it here Its fun to play with. This digital circuit reminds me of an analog op-amp. Both can do almost anything in there field. Extra info Someone has made a 4 input one, but a 2 input is easier to understand. Just search "lut" for the 4 input one. Enjoy

published 8 years ago