{"id":1827,"date":"2026-03-26T08:09:06","date_gmt":"2026-03-26T08:09:06","guid":{"rendered":"https:\/\/www.tech-posts.com\/vi\/timing-diagrams-explained-basics-advanced-concepts\/"},"modified":"2026-03-26T08:09:06","modified_gmt":"2026-03-26T08:09:06","slug":"timing-diagrams-explained-basics-advanced-concepts","status":"publish","type":"post","link":"https:\/\/www.tech-posts.com\/vi\/timing-diagrams-explained-basics-advanced-concepts\/","title":{"rendered":"Gi\u1ea3i th\u00edch S\u01a1 \u0111\u1ed3 Th\u1eddi gian: T\u1eeb C\u01a1 b\u1ea3n \u0111\u1ebfn C\u00e1c Kh\u00e1i ni\u1ec7m N\u00e2ng cao"},"content":{"rendered":"

Trong th\u1ebf gi\u1edbi \u0111i\u1ec7n t\u1eed s\u1ed1 v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng, th\u1eddi gian kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t chi\u1ec1u; n\u00f3 l\u00e0 tham s\u1ed1 then ch\u1ed1t quy\u1ebft \u0111\u1ecbnh xem m\u1ed9t m\u1ea1ch c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang hay th\u1ea5t b\u1ea1i m\u1ed9t c\u00e1ch th\u1ea3m kh\u1ed1c hay kh\u00f4ng.S\u01a1 \u0111\u1ed3 th\u1eddi gian<\/strong>l\u00e0 ng\u00f4n ng\u1eef tr\u1ef1c quan m\u00e0 c\u00e1c k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng \u0111\u1ec3 giao ti\u1ebfp v\u1ec1 c\u00e1ch c\u00e1c t\u00edn hi\u1ec7u h\u00e0nh x\u1eed theo th\u1eddi gian. D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf giao di\u1ec7n vi \u0111i\u1ec1u khi\u1ec3n, g\u1ee1 l\u1ed7i bus b\u1ed9 nh\u1edb hay ph\u00e2n t\u00edch truy\u1ec1n d\u1eabn d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao, vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0 \u0111i\u1ec1u b\u1eaft bu\u1ed9c.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u01a1 ch\u1ebf c\u1ee7a c\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian, ph\u00e2n t\u00edch c\u00e1c h\u00e0nh vi t\u00edn hi\u1ec7u ph\u1ee9c t\u1ea1p th\u00e0nh nh\u1eefng th\u00e0nh ph\u1ea7n d\u1ec5 hi\u1ec3u. Ch\u00fang ta s\u1ebd \u0111i t\u1eeb c\u00e1c \u0111\u1ecbnh ngh\u0129a c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c k\u1ef9 thu\u1eadt ph\u00e2n t\u00edch n\u00e2ng cao, \u0111\u1ea3m b\u1ea3o b\u1ea1n c\u00f3 \u0111\u1ea7y \u0111\u1ee7 c\u00f4ng c\u1ee5 \u0111\u1ec3 di\u1ec5n gi\u1ea3i c\u00e1c d\u1ea1ng s\u00f3ng m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n

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\"Cartoon<\/figure>\n<\/div>\n

\ud83d\udd0d S\u01a1 \u0111\u1ed3 Th\u1eddi gian l\u00e0 g\u00ec?<\/h2>\n

S\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 bi\u1ec3u di\u1ec5n \u0111\u1ed3 h\u1ecda v\u1ec1 th\u1ee9 t\u1ef1 thay \u0111\u1ed5i t\u00edn hi\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng s\u1ed1. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 m\u1ea1ch, n\u01a1i th\u1ec3 hi\u1ec7n c\u00e1ch c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i, s\u01a1 \u0111\u1ed3 th\u1eddi gian minh h\u1ecdakhi n\u00e0o<\/strong>nh\u1eefng k\u1ebft n\u1ed1i n\u00e0y thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i. N\u00f3 bi\u1ec3u di\u1ec5n ho\u1ea1t \u0111\u1ed9ng t\u00edn hi\u1ec7u d\u1ecdc theo tr\u1ee5c th\u1eddi gian ngang, gi\u00fap c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf x\u00e1c minh r\u1eb1ng d\u1eef li\u1ec7u \u1ed5n \u0111\u1ecbnh tr\u01b0\u1edbc khi c\u00f3 c\u1ea1nh \u0111\u1ed3ng h\u1ed3 ho\u1eb7c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t \u0111\u00fang l\u00fac.<\/p>\n

C\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft cho:<\/p>\n

    \n
  • X\u00e1c minh t\u01b0\u01a1ng t\u00e1c gi\u1eefa ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m.<\/li>\n
  • G\u1ee1 l\u1ed7i c\u00e1c giao th\u1ee9c truy\u1ec1n th\u00f4ng.<\/li>\n
  • \u0110\u1ea3m b\u1ea3o c\u00e1c y\u00eau c\u1ea7u v\u1ec1 th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 gi\u1eef \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng.<\/li>\n
  • T\u00e0i li\u1ec7u h\u00f3a h\u00e0nh vi h\u1ec7 th\u1ed1ng \u0111\u1ec3 b\u1ea3o tr\u00ec trong t\u01b0\u01a1ng lai.<\/li>\n<\/ul>\n

    Kh\u00f4ng c\u00f3 s\u1ef1 hi\u1ec3u r\u00f5 r\u00f5 r\u00e0ng v\u1ec1 th\u1eddi gian, ngay c\u1ea3 m\u1ed9t m\u1ea1ch h\u1ee3p logic c\u0169ng c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i do hi\u1ec7n t\u01b0\u1ee3ng \u0111ua t\u00edn hi\u1ec7u ho\u1eb7c b\u1ea5t \u1ed5n tr\u1ea1ng th\u00e1i.<\/p>\n

    \ud83d\udee0\ufe0f C\u00e1c Th\u00e0nh ph\u1ea7n Ch\u00ednh c\u1ee7a S\u01a1 \u0111\u1ed3 Th\u1eddi gian<\/h2>\n

    \u0110\u1ec3 \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian hi\u1ec7u qu\u1ea3, b\u1ea1n ph\u1ea3i x\u00e1c \u0111\u1ecbnh c\u00e1c kh\u1ed1i x\u00e2y d\u1ef1ng c\u01a1 b\u1ea3n c\u1ee7a n\u00f3. M\u1ed7i th\u00e0nh ph\u1ea7n mang th\u00f4ng tin c\u1ee5 th\u1ec3 v\u1ec1 tr\u1ea1ng th\u00e1i v\u00e0 lu\u1ed3ng c\u1ee7a h\u1ec7 th\u1ed1ng s\u1ed1.<\/p>\n

    1. Tr\u1ee5c Th\u1eddi gian<\/h3>\n

    \u0110\u01b0\u1eddng th\u1eb3ng n\u1eb1m ngang bi\u1ec3u di\u1ec5n s\u1ef1 ti\u1ebfn tri\u1ec3n c\u1ee7a th\u1eddi gian. Th\u01b0\u1eddng ch\u1ea3y t\u1eeb tr\u00e1i sang ph\u1ea3i. Trong c\u00e1c t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt chi ti\u1ebft, tr\u1ee5c n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u b\u1eb1ng c\u00e1c \u0111\u01a1n v\u1ecb th\u1eddi gian c\u1ee5 th\u1ec3 (nanosecond, picosecond) ho\u1eb7c chu k\u1ef3 \u0111\u1ed3ng h\u1ed3.<\/p>\n

    2. C\u00e1c D\u00f2ng T\u00edn hi\u1ec7u<\/h3>\n

    C\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng bi\u1ec3u di\u1ec5n c\u00e1c t\u00edn hi\u1ec7u ri\u00eang l\u1ebb, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u01b0\u1eddng \u0111\u1ed3ng h\u1ed3, bus d\u1eef li\u1ec7u ho\u1eb7c c\u00e1c \u0111\u01b0\u1eddng \u0111i\u1ec1u khi\u1ec3n (nh\u01b0 ch\u1ecdn chip ho\u1eb7c \u0111\u1ecdc\/ghi). M\u1ed7i \u0111\u01b0\u1eddng t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t n\u00fat c\u1ee5 th\u1ec3 trong m\u1ea1ch.<\/p>\n

    3. M\u1ee9c Logic<\/h3>\n

    C\u00e1c t\u00edn hi\u1ec7u th\u01b0\u1eddng t\u1ed3n t\u1ea1i \u1edf m\u1ed9t trong hai tr\u1ea1ng th\u00e1i:<\/p>\n

      \n
    • Cao (Logic 1 \/ VCC):<\/strong>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng \u1edf \u0111\u1ea7u tr\u00ean c\u1ee7a \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u.<\/li>\n
    • Th\u1ea5p (Logic 0 \/ GND):<\/strong>\u0110\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng \u1edf \u0111\u1ea7u d\u01b0\u1edbi c\u1ee7a \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u.<\/li>\n<\/ul>\n

      M\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ngLogic K\u00edch ho\u1ea1t Th\u1ea5p<\/strong>logic, trong \u0111\u00f3 t\u00edn hi\u1ec7u th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3 khi \u0111i\u1ec7n \u00e1p th\u1ea5p. Trong s\u01a1 \u0111\u1ed3, \u0111i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ec9 ra b\u1eb1ng m\u1ed9t v\u00f2ng tr\u00f2n nh\u1ecf \u1edf t\u00ean t\u00edn hi\u1ec7u ho\u1eb7c k\u00fd hi\u1ec7u \u0111\u1eb7c bi\u1ec7t.<\/p>\n

      4. C\u00e1c chuy\u1ec3n ti\u1ebfp<\/h3>\n

      C\u00e1c chuy\u1ec3n ti\u1ebfp l\u00e0 nh\u1eefng kho\u1ea3nh kh\u1eafc m\u00e0 m\u1ed9t t\u00edn hi\u1ec7u thay \u0111\u1ed5i t\u1eeb Cao sang Th\u1ea5p ho\u1eb7c t\u1eeb Th\u1ea5p sang Cao.<\/p>\n

        \n
      • C\u1ea1nh t\u0103ng:<\/strong>Chuy\u1ec3n ti\u1ebfp t\u1eeb Th\u1ea5p sang Cao. R\u1ea5t quan tr\u1ecdng \u0111\u1ec3 k\u00edch ho\u1ea1t c\u00e1c s\u1ef1 ki\u1ec7n.<\/li>\n
      • C\u1ea1nh gi\u1ea3m:<\/strong>Chuy\u1ec3n ti\u1ebfp t\u1eeb Cao sang Th\u1ea5p. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c tr\u00ecnh t\u1ef1 \u0111i\u1ec1u khi\u1ec3n c\u1ee5 th\u1ec3.<\/li>\n
      • K\u00edch ho\u1ea1t theo c\u1ea1nh:<\/strong>T\u00edn hi\u1ec7u ch\u1ec9 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 trong qu\u00e1 tr\u00ecnh chuy\u1ec3n ti\u1ebfp, ch\u1ee9 kh\u00f4ng ph\u1ea3i trong tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n

        \u2699\ufe0f C\u00e1c tham s\u1ed1 th\u1eddi gian ch\u00ednh<\/h2>\n

        Thi\u1ebft k\u1ebf s\u1ed1 ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c \u0111\u1ecbnh l\u01b0\u1ee3ng m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u. C\u00e1c tham s\u1ed1 sau \u0111\u00e2y l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a ph\u00e2n t\u00edch th\u1eddi gian.<\/p>\n

        1. Th\u1eddi gian lan truy\u1ec1n (tpd<\/sub>)<\/h3>\n

        \u0110\u00e2y l\u00e0 kho\u1ea3ng th\u1eddi gian \u0111\u1ec3 m\u1ed9t t\u00edn hi\u1ec7u di chuy\u1ec3n t\u1eeb \u0111\u1ea7u v\u00e0o c\u1ee7a m\u1ed9t c\u1ed5ng logic ho\u1eb7c th\u00e0nh ph\u1ea7n \u0111\u1ebfn \u0111\u1ea7u ra c\u1ee7a n\u00f3. Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u n\u00e0o thay \u0111\u1ed5i ngay l\u1eadp t\u1ee9c; c\u00e1c gi\u1edbi h\u1ea1n v\u1eadt l\u00fd g\u00e2y ra \u0111\u1ed9 tr\u1ec5.<\/p>\n

          \n
        • \u00dd ngh\u0129a:<\/strong> N\u1ebfu \u0111\u1ed9 tr\u1ec5 qu\u00e1 d\u00e0i, logic ti\u1ebfp theo c\u00f3 th\u1ec3 nh\u1eadn d\u1eef li\u1ec7u qu\u00e1 mu\u1ed9n, d\u1eabn \u0111\u1ebfn l\u1ed7i.<\/li>\n
        • \u0110o l\u01b0\u1eddng:<\/strong>\u0110o t\u1eeb \u0111i\u1ec3m \u0111i\u1ec7n \u00e1p 50% c\u1ee7a chuy\u1ec3n ti\u1ebfp \u0111\u1ea7u v\u00e0o \u0111\u1ebfn \u0111i\u1ec3m \u0111i\u1ec7n \u00e1p 50% c\u1ee7a chuy\u1ec3n ti\u1ebfp \u0111\u1ea7u ra.<\/li>\n<\/ul>\n

          2. Th\u1eddi gian thi\u1ebft l\u1eadp (tsu<\/sub>)<\/h3>\n

          Th\u1eddi gian thi\u1ebft l\u1eadp l\u00e0 kho\u1ea3ng th\u1eddi gian t\u1ed1i thi\u1ec3u m\u00e0 c\u00e1c t\u00edn hi\u1ec7u d\u1eef li\u1ec7u ph\u1ea3i \u1ed5n \u0111\u1ecbnhtr\u01b0\u1edbc<\/strong>m\u1ed9t c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfn.<\/p>\n

            \n
          • T\u00ecnh hu\u1ed1ng:<\/strong> N\u1ebfu m\u1ed9t flip-flop c\u1ea7n d\u1eef li\u1ec7u s\u1eb5n s\u00e0ng 5 nanosecond tr\u01b0\u1edbc khi \u0111\u1ed3ng h\u1ed3 k\u00edch ho\u1ea1t, th\u00ec \u0111\u00f3 ch\u00ednh l\u00e0 th\u1eddi gian thi\u1ebft l\u1eadp.<\/li>\n
          • Vi ph\u1ea1m:<\/strong> N\u1ebfu d\u1eef li\u1ec7u thay \u0111\u1ed5i qu\u00e1 g\u1ea7n c\u1ea1nh \u0111\u1ed3ng h\u1ed3, h\u1ec7 th\u1ed1ng s\u1ebd kh\u00f4ng th\u1ec3 ghi nh\u1eadn gi\u00e1 tr\u1ecb m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n

            3. Th\u1eddi gian gi\u1eef (th<\/sub>)<\/h3>\n

            Th\u1eddi gian gi\u1eef l\u00e0 kho\u1ea3ng th\u1eddi gian t\u1ed1i thi\u1ec3u m\u00e0 c\u00e1c t\u00edn hi\u1ec7u d\u1eef li\u1ec7u ph\u1ea3i duy tr\u00ec \u1ed5n \u0111\u1ecbnhsau<\/strong>m\u1ed9t c\u1ea1nh xung nh\u1ecbp \u0111\u1ebfn.<\/p>\n

              \n
            • T\u00ecnh hu\u1ed1ng:<\/strong>B\u1ed9 flip-flop c\u1ea7n “th\u1ea5y” d\u1eef li\u1ec7u trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn sau khi k\u00edch ho\u1ea1t \u0111\u1ec3 gi\u1eef d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch an to\u00e0n.<\/li>\n
            • Vi ph\u1ea1m:<\/strong>N\u1ebfu d\u1eef li\u1ec7u thay \u0111\u1ed5i ngay l\u1eadp t\u1ee9c sau c\u1ea1nh xung nh\u1ecbp, \u0111\u1ea7u v\u00e0o c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c gi\u1eef \u0111\u00fang c\u00e1ch.<\/li>\n<\/ul>\n

              4. \u0110\u1ed9 l\u1ec7ch xung nh\u1ecbp<\/h3>\n

              \u0110\u1ed9 l\u1ec7ch xung nh\u1ecbp x\u1ea3y ra khi t\u00edn hi\u1ec7u xung nh\u1ecbp \u0111\u1ebfn c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nhau v\u00e0o c\u00e1c th\u1eddi \u0111i\u1ec3m kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng do s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn tr\u00ean bo m\u1ea1ch in.<\/p>\n

                \n
              • \u0110\u1ed9 l\u1ec7ch d\u01b0\u01a1ng:<\/strong>Xung nh\u1ecbp \u0111\u1ebfn mu\u1ed9n h\u01a1n t\u1ea1i \u0111i\u1ec3m \u0111\u00edch.<\/li>\n
              • \u0110\u1ed9 l\u1ec7ch \u00e2m:<\/strong>Xung nh\u1ecbp \u0111\u1ebfn s\u1edbm h\u01a1n t\u1ea1i \u0111i\u1ec3m \u0111\u00edch.<\/li>\n<\/ul>\n

                5. Rung \u0111\u1ed9ng<\/h3>\n

                Rung \u0111\u1ed9ng l\u00e0 s\u1ef1 bi\u1ebfn thi\u00ean ng\u1eafn h\u1ea1n c\u1ee7a c\u00e1c th\u1eddi \u0111i\u1ec3m quan tr\u1ecdng trong t\u00edn hi\u1ec7u so v\u1edbi v\u1ecb tr\u00ed l\u00fd t\u01b0\u1edfng c\u1ee7a ch\u00fang theo th\u1eddi gian. N\u00f3 l\u00e0m t\u0103ng \u0111\u1ed9 kh\u00f4ng ch\u1eafc ch\u1eafn trong ph\u00e2n t\u00edch th\u1eddi gian.<\/p>\n

                \ud83d\udcca So s\u00e1nh: Thi\u1ebft k\u1ebf \u0111\u1ed3ng b\u1ed9 vs. Kh\u00f4ng \u0111\u1ed3ng b\u1ed9<\/h2>\n

                Hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa hai tri\u1ebft l\u00fd thi\u1ebft k\u1ebf n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 di\u1ec5n gi\u1ea3i \u0111\u00fang c\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian.<\/p>\n\n\n\n\n\n\n\n\n\n
                T\u00ednh n\u0103ng<\/th>\nTh\u1eddi gian \u0111\u1ed3ng b\u1ed9<\/th>\nTh\u1eddi gian kh\u00f4ng \u0111\u1ed3ng b\u1ed9<\/th>\n<\/tr>\n<\/thead>\n
                T\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n<\/strong><\/td>\nS\u1eed d\u1ee5ng m\u1ed9t \u0111\u1ed3ng h\u1ed3 to\u00e0n c\u1ee5c<\/td>\nS\u1eed d\u1ee5ng t\u00edn hi\u1ec7u trao \u0111\u1ed5i<\/td>\n<\/tr>\n
                T\u00ednh d\u1ef1 \u0111o\u00e1n<\/strong><\/td>\nR\u1ea5t d\u1ec5 d\u1ef1 \u0111o\u00e1n<\/td>\nThay \u0111\u1ed5i t\u00f9y theo t\u1ea3i<\/td>\n<\/tr>\n
                \u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/strong><\/td>\nY\u00eau c\u1ea7u ph\u00e2n ph\u1ed1i \u0111\u1ed3ng h\u1ed3<\/td>\nY\u00eau c\u1ea7u logic trao \u0111\u1ed5i ph\u1ee9c t\u1ea1p<\/td>\n<\/tr>\n
                Ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng<\/strong><\/td>\nC\u00f3 th\u1ec3 cao (\u0111\u1ea3o chi\u1ec1u \u0111\u1ed3ng h\u1ed3)<\/td>\nTh\u01b0\u1eddng th\u1ea5p h\u01a1n (ph\u1ee5 thu\u1ed9c v\u00e0o ho\u1ea1t \u0111\u1ed9ng)<\/td>\n<\/tr>\n
                S\u01a1 \u0111\u1ed3 th\u1eddi gian<\/strong><\/td>\n\u0110\u01b0\u1ee3c c\u0103n ch\u1ec9nh theo c\u00e1c c\u1ea1nh \u0111\u1ed3ng h\u1ed3<\/td>\nPh\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c ho\u00e0n th\u00e0nh tr\u1ea1ng th\u00e1i tr\u01b0\u1edbc \u0111\u00f3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                \ud83e\uddd0 C\u00e1ch \u0111\u1ecdc v\u00e0 ph\u00e2n t\u00edch s\u01a1 \u0111\u1ed3 th\u1eddi gian<\/h2>\n

                Vi\u1ec7c ph\u00e2n t\u00edch m\u1ed9t d\u1ea1ng s\u00f3ng \u0111\u00f2i h\u1ecfi ph\u01b0\u01a1ng ph\u00e1p h\u1ec7 th\u1ed1ng. H\u00e3y tu\u00e2n theo c\u00e1c b\u01b0\u1edbc sau \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o b\u1ea1n kh\u00f4ng b\u1ecf s\u00f3t c\u00e1c chi ti\u1ebft quan tr\u1ecdng.<\/p>\n

                B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh \u0111\u1ed3ng h\u1ed3<\/h3>\n

                T\u00ecm t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 ch\u00ednh. \u0110\u00e2y th\u01b0\u1eddng l\u00e0 tham chi\u1ebfu cho t\u1ea5t c\u1ea3 c\u00e1c t\u00edn hi\u1ec7u th\u1eddi gian kh\u00e1c. Trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1ed3ng b\u1ed9, m\u1ecdi chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u n\u00ean \u0111\u01b0\u1ee3c tham chi\u1ebfu l\u00fd t\u01b0\u1edfng \u0111\u1ebfn c\u1ea1nh \u0111\u1ed3ng h\u1ed3 n\u00e0y.<\/p>\n

                B\u01b0\u1edbc 2: Ki\u1ec3m tra c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea3y v\u1ecdt<\/h3>\n

                Ki\u1ec3m tra c\u00e1c xung ng\u1eafn, kh\u00f4ng mong mu\u1ed1n (hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea3y v\u1ecdt) tr\u00ean c\u00e1c \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u. Nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y c\u00f3 th\u1ec3 g\u00e2y k\u00edch ho\u1ea1t sai trong c\u00e1c c\u1ed5ng logic. Trong s\u01a1 \u0111\u1ed3 s\u1ea1ch, c\u00e1c chuy\u1ec3n ti\u1ebfp n\u00ean r\u00f5 r\u00e0ng, m\u1eb7c d\u00f9 vi\u1ec7c thu th\u1eadp th\u1ef1c t\u1ebf th\u01b0\u1eddng hi\u1ec3n th\u1ecb nhi\u1ec5u.<\/p>\n

                B\u01b0\u1edbc 3: X\u00e1c minh c\u00e1c c\u1eeda s\u1ed5 thi\u1ebft l\u1eadp v\u00e0 gi\u1eef<\/h3>\n

                V\u1ebd c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng \u1ea3o d\u1ecdc \u0111\u1ea1i di\u1ec7n cho c\u00e1c c\u1eeda s\u1ed5 thi\u1ebft l\u1eadp v\u00e0 gi\u1eef xung quanh c\u1ea1nh \u0111\u1ed3ng h\u1ed3 ho\u1ea1t \u0111\u1ed9ng. \u0110\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u d\u1eef li\u1ec7u \u1ed5n \u0111\u1ecbnh trong c\u00e1c v\u00f9ng n\u00e0y.<\/p>\n

                B\u01b0\u1edbc 4: Ki\u1ec3m tra c\u00e1c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n<\/h3>\n

                \u0110\u1ea3m b\u1ea3o c\u00e1c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n nh\u01b0 Chip Select (CS) ho\u1eb7c Enable (EN) ho\u1ea1t \u0111\u1ed9ng trong su\u1ed1t th\u1eddi gian truy\u1ec1n d\u1eef li\u1ec7u. N\u1ebfu m\u1ed9t t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n gi\u1ea3m trong khi d\u1eef li\u1ec7u v\u1eabn \u0111ang \u0111\u01b0\u1ee3c g\u1eedi, s\u1ebd x\u1ea3y ra l\u1ed7i d\u1eef li\u1ec7u.<\/p>\n

                B\u01b0\u1edbc 5: \u0110o kho\u1ea3ng th\u1eddi gian<\/h3>\n

                T\u00ednh to\u00e1n kho\u1ea3ng th\u1eddi gian gi\u1eefa c\u00e1c s\u1ef1 ki\u1ec7n c\u1ee5 th\u1ec3. V\u00ed d\u1ee5, \u0111o \u0111\u1ed9 tr\u1ec5 t\u1eeb t\u00edn hi\u1ec7u \u201cY\u00eau c\u1ea7u\u201d \u0111\u1ebfn t\u00edn hi\u1ec7u \u201cPh\u1ea3n h\u1ed3i\u201d. \u0110i\u1ec1u n\u00e0y gi\u00fap x\u00e1c minh hi\u1ec7u su\u1ea5t so v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n

                \ud83d\ude80 C\u00e1c kh\u00e1i ni\u1ec7m n\u00e2ng cao trong ph\u00e2n t\u00edch th\u1eddi gian<\/h2>\n

                Khi c\u00e1c h\u1ec7 th\u1ed1ng tr\u1edf n\u00ean nhanh h\u01a1n v\u00e0 ph\u1ee9c t\u1ea1p h\u01a1n, c\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian c\u01a1 b\u1ea3n d\u1ea7n ph\u00e1t tri\u1ec3n th\u00e0nh c\u00e1c y\u00eau c\u1ea7u ph\u00e2n t\u00edch tinh vi h\u01a1n.<\/p>\n

                1. Hi\u1ec7n t\u01b0\u1ee3ng b\u1ea5t \u1ed5n<\/h3>\n

                Hi\u1ec7n t\u01b0\u1ee3ng b\u1ea5t \u1ed5n x\u1ea3y ra khi m\u1ed9t flip-flop nh\u1eadn t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o vi ph\u1ea1m y\u00eau c\u1ea7u th\u1eddi gian thi\u1ebft l\u1eadp ho\u1eb7c th\u1eddi gian gi\u1eef. Thay v\u00ec chuy\u1ec3n v\u1ec1 tr\u1ea1ng th\u00e1i r\u00f5 r\u00e0ng l\u00e0 0 ho\u1eb7c 1, \u0111\u1ea7u ra s\u1ebd v\u00e0o tr\u1ea1ng th\u00e1i kh\u00f4ng x\u00e1c \u0111\u1ecbnh trong m\u1ed9t kho\u1ea3ng th\u1eddi gian kh\u00f4ng th\u1ec3 d\u1ef1 \u0111o\u00e1n.<\/p>\n

                  \n
                • Nguy\u00ean nh\u00e2n:<\/strong>Th\u01b0\u1eddng x\u1ea3y ra khi c\u00e1c t\u00edn hi\u1ec7u b\u1ea5t \u0111\u1ed3ng b\u1ed9 v\u01b0\u1ee3t qua c\u00e1c mi\u1ec1n \u0111\u1ed3ng h\u1ed3.<\/li>\n
                • Gi\u1ea3m thi\u1ec3u:<\/strong>S\u1eed d\u1ee5ng chu\u1ed7i \u0111\u1ed3ng b\u1ed9 h\u00f3a (nhi\u1ec1u flip-flop n\u1ed1i ti\u1ebfp) \u0111\u1ec3 gi\u1ea3m x\u00e1c su\u1ea5t x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng b\u1ea5t \u1ed5n.<\/li>\n
                • H\u00ecnh \u1ea3nh minh h\u1ecda:<\/strong>Tr\u00ean s\u01a1 \u0111\u1ed3 th\u1eddi gian, \u0111i\u1ec1u n\u00e0y tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t t\u00edn hi\u1ec7u dao \u0111\u1ed9ng ho\u1eb7c m\u1ea5t th\u1eddi gian b\u1ea5t th\u01b0\u1eddng \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n

                  2. Ng\u00e2n s\u00e1ch th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 gi\u1eef<\/h3>\n

                  C\u00e1c k\u1ef9 s\u01b0 t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch th\u1eddi gian \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 t\u1ed1i \u0111a. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c tr\u1eeb t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ed9 tr\u1ec5 (d\u00e2y d\u1eabn, c\u1ed5ng, l\u1ec7ch \u0111\u1ed3ng h\u1ed3) kh\u1ecfi chu k\u1ef3 \u0111\u1ed3ng h\u1ed3.<\/p>\n

                  N\u1ebfu t\u1ed5ng \u0111\u1ed9 tr\u1ec5 v\u01b0\u1ee3t qu\u00e1 th\u1eddi gian s\u1eb5n c\u00f3, t\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1ea3m xu\u1ed1ng.<\/p>\n

                  3. Th\u1eddi gian giao ti\u1ebfp t\u1ed1c \u0111\u1ed9 cao<\/h3>\n

                  C\u00e1c giao di\u1ec7n nh\u01b0 b\u1ed9 nh\u1edb DDR ho\u1eb7c PCIe y\u00eau c\u1ea7u th\u1eddi gian ch\u00ednh x\u00e1c c\u1ef1c k\u1ef3. C\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y th\u01b0\u1eddng bao g\u1ed3m:<\/p>\n

                    \n
                  • S\u01a1 \u0111\u1ed3 m\u1eaft:<\/strong> S\u1ef1 ch\u1ed3ng ch\u1eadp c\u1ee7a nhi\u1ec1u chuy\u1ec3n ti\u1ebfp t\u00edn hi\u1ec7u \u0111\u1ec3 tr\u1ef1c quan h\u00f3a ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u.<\/li>\n
                  • Sai l\u1ec7ch chu k\u1ef3 nhi\u1ec7m v\u1ee5:<\/strong> \u0110\u1ea3m b\u1ea3o th\u1eddi gian cao v\u00e0 th\u1ea5p \u0111\u01b0\u1ee3c c\u00e2n b\u1eb1ng.<\/li>\n
                  • \u0110\u1ed3ng b\u1ed9 pha:<\/strong> \u0110\u1ea3m b\u1ea3o d\u1eef li\u1ec7u v\u00e0 t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfn \u0111\u1ed3ng b\u1ed9 tr\u00ean nhi\u1ec1u bit.<\/li>\n<\/ul>\n

                    4. C\u00e1c tr\u1ea1ng th\u00e1i qu\u1ea3n l\u00fd n\u0103ng l\u01b0\u1ee3ng<\/h3>\n

                    C\u00e1c thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng th\u1ea5p. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3i t\u00ednh \u0111\u1ebfn \u0111\u1ed9 tr\u1ec5 \u0111\u00e1nh th\u1ee9c. V\u00ed d\u1ee5, t\u00edn hi\u1ec7u c\u1ea5p ngu\u1ed3n cho thi\u1ebft b\u1ecb ngo\u1ea1i vi ph\u1ea3i x\u1ea3y ra tr\u01b0\u1edbc khi thi\u1ebft b\u1ecb s\u1eb5n s\u00e0ng nh\u1eadn d\u1eef li\u1ec7u.<\/p>\n

                    \ud83d\udcdd C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho t\u00e0i li\u1ec7u<\/h2>\n

                    T\u00e0i li\u1ec7u r\u00f5 r\u00e0ng gi\u00fap ng\u0103n ng\u1eeba l\u1ed7i trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n v\u00e0 g\u1ee1 l\u1ed7i. Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y khi t\u1ea1o ho\u1eb7c xem x\u00e9t s\u01a1 \u0111\u1ed3 th\u1eddi gian.<\/p>\n

                      \n
                    • T\u1ef7 l\u1ec7 \u0111\u1ed3ng nh\u1ea5t:<\/strong> S\u1eed d\u1ee5ng c\u00e1c thang th\u1eddi gian \u0111\u1ed3ng nh\u1ea5t tr\u00ean c\u00e1c s\u01a1 \u0111\u1ed3 li\u00ean quan \u0111\u1ec3 d\u1ec5 so s\u00e1nh.<\/li>\n
                    • Nh\u00e3n r\u00f5 r\u00e0ng:<\/strong> M\u1ed7i t\u00edn hi\u1ec7u ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n v\u1edbi ch\u1ee9c n\u0103ng v\u00e0 c\u1ef1c t\u00ednh logic (v\u00ed d\u1ee5, RESET#<\/code> \u0111\u1ec3 ch\u1ec9 m\u1ee9c th\u1ea5p ho\u1ea1t \u0111\u1ed9ng).<\/li>\n
                    • M\u1ee9c ph\u00f3ng to:<\/strong> Cung c\u1ea5p c\u1ea3 c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea5p cao v\u00e0 h\u00ecnh \u1ea3nh ph\u00f3ng to chi ti\u1ebft c\u00e1c chuy\u1ec3n ti\u1ebfp quan tr\u1ecdng (nh\u01b0 kho\u1ea3ng th\u1eddi gian thi\u1ebft l\u1eadp\/gi\u1eef).<\/li>\n
                    • M\u00e3 m\u00e0u:<\/strong> S\u1eed d\u1ee5ng m\u00e0u s\u1eafc \u0111\u1ec3 ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c mi\u1ec1n \u0111i\u1ec7n \u00e1p kh\u00e1c nhau ho\u1eb7c ngu\u1ed3n \u0111\u1ed3ng h\u1ed3 (v\u00ed d\u1ee5: \u0110\u1ecf cho \u0110\u1ed3ng h\u1ed3, Xanh d\u01b0\u01a1ng cho D\u1eef li\u1ec7u).<\/li>\n
                    • Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n:<\/strong> Y\u00eau c\u1ea7u v\u1ec1 th\u1eddi gian thay \u0111\u1ed5i. \u0110\u1ea3m b\u1ea3o c\u00e1c s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c ghi phi\u00ean b\u1ea3n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi phi\u00ean b\u1ea3n ph\u1ea7n c\u1ee9ng.<\/li>\n<\/ul>\n

                      \ud83d\udee0\ufe0f Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/h2>\n

                      Ngay c\u1ea3 c\u00e1c k\u1ef9 s\u01b0 c\u00f3 kinh nghi\u1ec7m c\u0169ng g\u1eb7p ph\u1ea3i v\u1ea5n \u0111\u1ec1 v\u1ec1 th\u1eddi gian. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng t\u00ecnh hu\u1ed1ng ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch x\u1eed l\u00fd ch\u00fang.<\/p>\n

                      Sai l\u1ea7m 1: B\u1ecf qua \u0111\u1ed9 tr\u1ec5 \u0111\u01b0\u1eddng d\u1eabn<\/h3>\n

                      C\u00e1c \u0111\u01b0\u1eddng d\u1eabn tr\u00ean bo m\u1ea1ch c\u00f3 chi\u1ec1u d\u00e0i v\u1eadt l\u00fd, g\u00e2y ra \u0111\u1ed9 tr\u1ec5. \u1ede t\u1ea7n s\u1ed1 cao, v\u00e0i inch d\u00e2y d\u1eabn c\u00f3 th\u1ec3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng m\u1ed9t chu k\u1ef3 \u0111\u1ed3ng h\u1ed3.<\/p>\n

                        \n
                      • Gi\u1ea3i ph\u00e1p:<\/strong>T\u00ednh \u0111\u1ebfn \u0111\u1ed9 d\u00e0i v\u1ebft n\u1ed1i trong c\u00e1c ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch th\u1eddi gian c\u1ee7a b\u1ea1n.<\/li>\n<\/ul>\n

                        T\u00ecnh hu\u1ed1ng sai l\u1ea7m 2: \u0110\u1ea7u v\u00e0o kh\u00f4ng k\u1ebft n\u1ed1i<\/h3>\n

                        C\u00e1c \u0111\u1ea7u v\u00e0o kh\u00f4ng k\u1ebft n\u1ed1i c\u00f3 th\u1ec3 tr\u00f4i v\u1ec1 m\u1ee9c \u0111i\u1ec7n \u00e1p trung gian, g\u00e2y ra dao \u0111\u1ed9ng.<\/p>\n

                          \n
                        • Gi\u1ea3i ph\u00e1p:<\/strong>\u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ea7u v\u00e0o \u0111\u1ec1u c\u00f3 \u0111i\u1ec7n tr\u1edf k\u00e9o l\u00ean ho\u1eb7c k\u00e9o xu\u1ed1ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng.<\/li>\n<\/ul>\n

                          T\u00ecnh hu\u1ed1ng sai l\u1ea7m 3: \u0110i\u1ec1u ki\u1ec7n c\u1ea1nh tranh<\/h3>\n

                          Khi hai t\u00edn hi\u1ec7u thay \u0111\u1ed5i \u0111\u1ed3ng th\u1eddi, th\u1ee9 t\u1ef1 \u0111\u1ebfn quy\u1ebft \u0111\u1ecbnh k\u1ebft qu\u1ea3.<\/p>\n

                            \n
                          • Gi\u1ea3i ph\u00e1p:<\/strong>S\u1eed d\u1ee5ng logic \u0111\u1ed3ng b\u1ed9 h\u00f3a ho\u1eb7c m\u00e1y tr\u1ea1ng th\u00e1i \u0111\u1ec3 s\u1eafp x\u1ebfp th\u1ee9 t\u1ef1 c\u00e1c s\u1ef1 ki\u1ec7n.<\/li>\n<\/ul>\n

                            T\u00ecnh hu\u1ed1ng sai l\u1ea7m 4: T\u0103ng v\u01b0\u1ee3t v\u00e0 gi\u1ea3m qu\u00e1 m\u1ee9c<\/h3>\n

                            Hi\u1ec7n t\u01b0\u1ee3ng ph\u1ea3n x\u1ea1 t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 khi\u1ebfn \u0111i\u1ec7n \u00e1p v\u01b0\u1ee3t qu\u00e1 ngu\u1ed3n cung c\u1ea5p (t\u0103ng v\u01b0\u1ee3t) ho\u1eb7c gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi m\u1ee9c \u0111\u1ea5t (gi\u1ea3m qu\u00e1 m\u1ee9c).<\/p>\n

                              \n
                            • Gi\u1ea3i ph\u00e1p:<\/strong>Th\u1ef1c hi\u1ec7n c\u00e1c \u0111i\u1ec7n tr\u1edf k\u1ebft th\u00fac ph\u00f9 h\u1ee3p v\u00e0 kh\u1edbp tr\u1edf kh\u00e1ng.<\/li>\n<\/ul>\n

                              \ud83d\udd17 \u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf<\/h2>\n

                              S\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt kh\u00e1c nhau.<\/p>\n

                              1. Giao di\u1ec7n b\u1ed9 nh\u1edb<\/h3>\n

                              DRAM v\u00e0 SDRAM y\u00eau c\u1ea7u c\u00e1c tr\u00ecnh t\u1ef1 th\u1eddi gian nghi\u00eam ng\u1eb7t cho c\u00e1c thao t\u00e1c \u0111\u1ecdc\/vi\u1ebft. \u0110\u1ed9 tr\u1ec5 CAS v\u00e0 kho\u1ea3ng th\u1eddi gian t\u1eeb RAS sang CAS l\u00e0 nh\u1eefng tham s\u1ed1 quan tr\u1ecdng \u0111\u01b0\u1ee3c minh h\u1ecda trong c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y.<\/p>\n

                              2. Giao ti\u1ebfp vi \u0111i\u1ec1u khi\u1ec3n<\/h3>\n

                              C\u00e1c giao th\u1ee9c nh\u01b0 I2C, SPI v\u00e0 UART ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c m\u1ed1i quan h\u1ec7 th\u1eddi gian c\u1ee5 th\u1ec3 gi\u1eefa \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 v\u00e0 \u0111\u01b0\u1eddng d\u1eef li\u1ec7u. V\u00ed d\u1ee5, trong I2C, \u0111\u01b0\u1eddng d\u1eef li\u1ec7u ph\u1ea3i \u1ed5n \u0111\u1ecbnh khi \u0111\u1ed3ng h\u1ed3 \u1edf m\u1ee9c cao.<\/p>\n

                              3. Th\u1ee9 t\u1ef1 c\u1ea5p ngu\u1ed3n<\/h3>\n

                              C\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p y\u00eau c\u1ea7u c\u00e1c ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n ph\u1ea3i \u0111\u01b0\u1ee3c b\u1eadt theo th\u1ee9 t\u1ef1 c\u1ee5 th\u1ec3. S\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ea3m b\u1ea3o \u0111i\u1ec7n \u00e1p c\u1ed1t l\u00f5i \u1ed5n \u0111\u1ecbnh tr\u01b0\u1edbc khi \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p I\/O.<\/p>\n

                              \ud83c\udfaf T\u00f3m t\u1eaft nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/h2>\n

                              Th\u00e0nh th\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u00f2i h\u1ecfi s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 ch\u00fa \u00fd \u0111\u1ebfn chi ti\u1ebft. Nh\u1eefng \u0111i\u1ec3m sau \u0111\u00e2y t\u00f3m t\u1eaft ki\u1ebfn th\u1ee9c thi\u1ebft y\u1ebfu cho thi\u1ebft k\u1ebf v\u00e0 ph\u00e2n t\u00edch hi\u1ec7u qu\u1ea3.<\/p>\n

                                \n
                              • Th\u1eddi gian l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t:<\/strong>Logic s\u1ed1 d\u1ef1a v\u00e0o c\u00e1c m\u1ed1i quan h\u1ec7 th\u1eddi gian ch\u00ednh x\u00e1c gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u.<\/li>\n
                              • Th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 th\u1eddi gian gi\u1eef:<\/strong>\u0110\u00e2y l\u00e0 hai r\u00e0ng bu\u1ed9c ph\u1ed5 bi\u1ebfn nh\u1ea5t quy\u1ebft \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a.<\/li>\n
                              • X\u00e1c minh tr\u1ef1c quan:<\/strong>C\u00e1c s\u01a1 \u0111\u1ed3 cho ph\u00e9p b\u1ea1n nh\u00ecn th\u1ea5y c\u00e1c xung \u0111\u1ed9t ti\u1ec1m t\u00e0ng tr\u01b0\u1edbc khi ph\u1ea7n c\u1ee9ng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng.<\/li>\n
                              • B\u1ed1i c\u1ea3nh l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng:<\/strong> Lu\u00f4n c\u00e2n nh\u1eafc m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd (b\u1ea3ng m\u1ea1ch in, nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec7n \u00e1p) \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian t\u00edn hi\u1ec7u.<\/li>\n
                              • Ti\u00eau chu\u1ea9n h\u00f3a:<\/strong>S\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u v\u00e0 k\u00fd hi\u1ec7u chu\u1ea9n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 r\u00f5 r\u00e0ng trong giao ti\u1ebfp gi\u1eefa c\u00e1c \u0111\u1ed9i nh\u00f3m.<\/li>\n<\/ul>\n

                                B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y, b\u1ea1n \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c h\u1ec7 th\u1ed1ng s\u1ed1 c\u1ee7a m\u00ecnh \u0111\u01b0\u1ee3c b\u1ec1n v\u1eefng, \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u su\u1ea5t cao. Kh\u1ea3 n\u0103ng hi\u1ec3u v\u00e0 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0 k\u1ef9 n\u0103ng c\u01a1 b\u1ea3n ph\u00e2n bi\u1ec7t c\u00e1c thi\u1ebft k\u1ebf ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi nh\u1eefng thi\u1ebft k\u1ebf th\u1ea5t b\u1ea1i trong th\u1ef1c t\u1ebf.<\/p>\n

                                \ud83d\udcc8 Ti\u1ebfn b\u01b0\u1edbc v\u1ec1 ph\u00eda tr\u01b0\u1edbc<\/h2>\n

                                Khi c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n, c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 th\u1eddi gian tr\u1edf n\u00ean kh\u1eaft khe h\u01a1n. C\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n \u0111\u1ea1i ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 gigahertz n\u01a1i m\u00e0 nanosecond c\u00f3 \u00fd ngh\u0129a l\u1edbn. Vi\u1ec7c h\u1ecdc t\u1eadp li\u00ean t\u1ee5c v\u1ec1 \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 \u0111\u00f3ng v\u00f2ng th\u1eddi gian l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 l\u00e0m vi\u1ec7c tr\u00ean ph\u1ea7n c\u1ee9ng th\u1ebf h\u1ec7 m\u1edbi.<\/p>\n

                                B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch c\u00e1c s\u01a1 \u0111\u1ed3 hi\u1ec7n c\u00f3 v\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian t\u01b0\u01a1ng \u1ee9ng. Th\u1ef1c h\u00e0nh \u0111o kho\u1ea3ng c\u00e1ch v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c vi ph\u1ea1m. Theo th\u1eddi gian, c\u00e1c m\u1eabu s\u1ebd tr\u1edf n\u00ean tr\u1ef1c gi\u00e1c, gi\u00fap b\u1ea1n d\u1ef1 \u0111o\u00e1n c\u00e1c v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi ch\u00fang xu\u1ea5t hi\u1ec7n v\u1ec1 m\u1eb7t v\u1eadt l\u00fd.<\/p>\n","protected":false},"excerpt":{"rendered":"

                                Trong th\u1ebf gi\u1edbi \u0111i\u1ec7n t\u1eed s\u1ed1 v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng, th\u1eddi gian kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t chi\u1ec1u; n\u00f3 l\u00e0 tham s\u1ed1 then ch\u1ed1t quy\u1ebft \u0111\u1ecbnh xem m\u1ed9t m\u1ea1ch c\u00f3…<\/p>\n","protected":false},"author":1,"featured_media":1828,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"S\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch: T\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c kh\u00e1i ni\u1ec7m n\u00e2ng cao","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian. Bao g\u1ed3m th\u1eddi gian thi\u1ebft l\u1eadp\/th\u1eddi gian gi\u1eef, \u0111\u1ed9 l\u1ec7ch \u0111\u1ed3ng h\u1ed3 v\u00e0 ph\u00e2n t\u00edch t\u00edn hi\u1ec7u cho m\u1ea1ch s\u1ed1. T\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn thi\u1ebft y\u1ebfu cho c\u00e1c k\u1ef9 s\u01b0.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[60],"tags":[87,92],"class_list":["post-1827","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-timing-diagram"],"yoast_head":"\nS\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch: T\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c kh\u00e1i ni\u1ec7m n\u00e2ng cao<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian. Bao g\u1ed3m th\u1eddi gian thi\u1ebft l\u1eadp\/th\u1eddi gian gi\u1eef, \u0111\u1ed9 l\u1ec7ch \u0111\u1ed3ng h\u1ed3 v\u00e0 ph\u00e2n t\u00edch t\u00edn hi\u1ec7u cho m\u1ea1ch s\u1ed1. T\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn thi\u1ebft y\u1ebfu cho c\u00e1c k\u1ef9 s\u01b0.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.tech-posts.com\/vi\/timing-diagrams-explained-basics-advanced-concepts\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"S\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch: T\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c kh\u00e1i ni\u1ec7m n\u00e2ng cao\" \/>\n<meta property=\"og:description\" content=\"H\u1ecdc c\u00e1ch \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian. Bao g\u1ed3m th\u1eddi gian thi\u1ebft l\u1eadp\/th\u1eddi gian gi\u1eef, \u0111\u1ed9 l\u1ec7ch \u0111\u1ed3ng h\u1ed3 v\u00e0 ph\u00e2n t\u00edch t\u00edn hi\u1ec7u cho m\u1ea1ch s\u1ed1. 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