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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Programmable logic array ： ウィキペディア英語版 Programmable logic array A programmable logic array (PLA) is a kind of programmable logic device used to implement combinational logic circuits. 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. It has 2^N AND Gates for N input variables and for M outputs from PLA, there shoould be M OR Gates, each with programmable inputs from all of the AND gates. This layout allows for a large number of logic functions to be synthesized in the sum of products (and sometimes product of sums) canonical forms. PLA's differ from Programmable Array Logic devices (PALs and GALs) in that both the AND and OR gate planes are programmable. == History == In 1970, Texas Instruments developed a mask-programmable IC based on the IBM read-only associative memory or ROAM. This device, the TMS2000, was programmed by altering the metal layer during the production of the IC. The TMS2000 had up to 17 inputs and 18 outputs with 8 JK flip flop for memory. TI coined the term ''Programmable Logic Array'' for this device. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Programmable logic array」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.