Plas programmable logic arrays ppt video online download. Ppt programmable logic array mohammed najm abdullah al. Unlike, pla product term cannot be shared among two or more or gates. Plds have undefined function at the time of manufacturing but they are programmed before made into use. It has 2 n and gates for n input variables, and for m outputs from pla, there should be m or gates. A programmable logic array pla has a programmable and array at the inputs and programmable or array at the outputs.
Programmable logic array pla is a fixed architecture logic device with programmable and gates followed by programmable or gates. Programmable logic arraypla, digital circuits slideshare. Programmable logic array pla e programmable array logic pal a a compact form of the internal logic of plds can be referred to as array logic. Unlike the pla, a product term cannot be shared among two or more or gates. The device shown in the figure has 4 inputs and 4 outputs. Programmable logic devices types of programmable logic devices plds programmable logic array pla programmable and array logic pal generic array logic gal a free powerpoint ppt presentation displayed as a flash slide show on id. Ppt programmable array logic pal powerpoint presentation. Fixed or array programmable and array easy to program poor flexibility boolean function must be simplified to fit into each.
Programmable logic devices programmable logic devices plds are the integrated circuits. Fpga field programmable gate array introduction, structure. Programmable array logic pal a a compact form of the internal logic of plds can be referred to as array logic when designing with a pal, the boolean functions must be simplified unlike the pla, a product term cannot be shared among two or more or gates. Pla is basically a type of programmable logic device used to build reconfigurable digital circuit. The pla has a programmable and array instead of hardwired and array. Programmable array logic pal a pal is similar to the pla but the difference is that in pal, only the and gate plane is programmable while the or gate plane is fixed during fabrication. A programmable logic array pla is a kind of programmable logic device used to implement combinational logic circuits. The device has a number of and and or gates which are linked together to give output or further combined with more gates or logic circuits. Boolean function must be simplified to fit into each section. Programmable logic array it is kind of pld used to implement combinational logic circuit. The pla has a set of programmable and gate planes, which link to a set of programmable or gate planes, which can then be conditionally complemented to produce an output. The pal device is a pld with a fixed or array and a programmable and array. Programmable logic array plas programmable logic array prefabricated building block of many andor gates or nor, nand.
Programmable array logic pal 1 programmable array logic pal fixed or array programmable and array. It is most economical to produce an ic in large volumes many. Programmable logic array pla c university of waterloo. When designing with a pal, the boolean functions must be simplified.1561 1193 1519 1366 441 1518 669 1570 1511 838 815 1329 752 361 170 1304 1508 1034 1578 210 1284 489 846 679 110 1361 1605 861 1461 1460 711 767 1070 1129 304 1267 956 348 757 493 382 1122 646