Chuong 05 Flip Flop - 1 1 Ch ng 5 Flip Flops Th.S ng Ng c...

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Unformatted text preview: 1 1 Ch ng 5 Flip Flops Th.S ng Ng c Khoa Khoa i n - i n T 2 Gi i thi u S h th ng s t ng qut bao g m thnh ph n nh v cc c ng logic 2 3 Flip-Flops Thnh ph n nh ph bi n nh t l cc Flip- flop, flip-flop c c u thnh t nh ng c ng logic n gi n. K hi u t ng qut c a m t flip-flop 4 M ch ch t c ng NAND M ch ch t c ng NAND l m t flip-flop n gi n. M ch ch t c hai ng vo l setv clear(preset). Ng vo tch c c m c th p, ng ra s thay i tr ng thi khi c xung th p ng vo. Khi m ch tr ng thi set Khi m ch tr ng thi clear (preset) 1 Q v Q = = Q v 1 Q = = 3 5 M ch ch t c ng NAND M ch ch t c ng NAND c hai tr ng thi n nh (tr ng thi ch t) ng v i tr ng h p SET = CLEAR = 1. 6 Tr ng thi SET m ch ch t Khi ng vo SET chuy n t tr ng thi cao xu ng tr ng thi th p, trong c hai tr ng h p ng ra Qs tr ng thi cao 4 7 Tr ng thi clear m ch ch t Khi ng vo CLEAR chuy n t tr ng thi cao xu ng tr ng thi th p, trong c hai tr ng h p ng ra Qs tr ng thi th p 8 M ch ch t c ng NAND SET = RESET = 1. Tr ng thi n nh, ng ra v...
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Chuong 05 Flip Flop - 1 1 Ch ng 5 Flip Flops Th.S ng Ng c...

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