{"id":1743,"date":"2026-03-31T20:10:10","date_gmt":"2026-03-31T20:10:10","guid":{"rendered":"https:\/\/www.tech-posts.com\/vi\/timing-diagrams-beginners-guide-2\/"},"modified":"2026-03-31T20:10:10","modified_gmt":"2026-03-31T20:10:10","slug":"timing-diagrams-beginners-guide-2","status":"publish","type":"post","link":"https:\/\/www.tech-posts.com\/vi\/timing-diagrams-beginners-guide-2\/","title":{"rendered":"S\u01a1 \u0111\u1ed3 th\u1eddi gian cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u: H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc"},"content":{"rendered":"

Trong th\u1ebf gi\u1edbi \u0111i\u1ec7n t\u1eed s\u1ed1 v\u00e0 k\u1ef9 thu\u1eadt m\u00e1y t\u00ednh, c\u00e1c t\u00edn hi\u1ec7u kh\u00f4ng t\u1ed3n t\u1ea1i trong tr\u1ea1ng th\u00e1i tr\u1ed1ng r\u1ed7ng. Ch\u00fang di chuy\u1ec3n qua c\u00e1c \u0111\u01b0\u1eddng d\u1eabn, \u0111i qua c\u00e1c c\u1ed5ng logic v\u00e0 v\u00e0o b\u1ed9 x\u1eed l\u00fd v\u1edbi nh\u1eefng r\u00e0ng bu\u1ed9c th\u1eddi gian c\u1ee5 th\u1ec3. \u0110\u1ec3 hi\u1ec3u c\u00e1ch m\u1ed9t h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng, c\u00e1c k\u1ef9 s\u01b0 ph\u1ea3i h\u00ecnh dung c\u00e1ch c\u00e1c t\u00edn hi\u1ec7u n\u00e0y thay \u0111\u1ed5i theo th\u1eddi gian. Vi\u1ec7c h\u00ecnh dung n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua s\u01a1 \u0111\u1ed3 th\u1eddi gian. V\u1edbi ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u, nh\u1eefng bi\u1ec3u \u0111\u1ed3 n\u00e0y c\u00f3 th\u1ec3 tr\u00f4ng nh\u01b0 nh\u1eefng k\u00fd t\u1ef1 ph\u1ee9c t\u1ea1p, nh\u01b0ng th\u1ef1c ra ch\u00fang l\u00e0 c\u00f4ng c\u1ee5 c\u01a1 b\u1ea3n nh\u1ea5t \u0111\u1ec3 g\u1ee1 l\u1ed7i v\u00e0 thi\u1ebft k\u1ebf logic s\u1ed1.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p ph\u00e2n t\u00edch chi ti\u1ebft v\u1ec1 s\u01a1 \u0111\u1ed3 th\u1eddi gian. Ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 c\u1ea5u t\u1ea1o c\u1ee7a m\u1ed9t t\u00edn hi\u1ec7u, c\u00e1c tham s\u1ed1 then ch\u1ed1t x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 tin c\u1eady, v\u00e0 nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 h\u1ec7 th\u1ed1ng. D\u00f9 b\u1ea1n \u0111ang \u00f4n thi hay thi\u1ebft k\u1ebf m\u1ea1ch vi \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u ti\u00ean c\u1ee7a m\u00ecnh, vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c bi\u1ec3u \u0111\u1ed3 n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft.<\/p>\n

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\"Beginner-friendly<\/figure>\n<\/div>\n

\ud83e\udde0 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 tr\u1ea1ng th\u00e1i c\u1ee7a c\u00e1c t\u00edn hi\u1ec7u s\u1ed1 theo th\u1eddi gian. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n, v\u1ed1n hi\u1ec3n th\u1ecb\u0111i\u1ec1u g\u00ec<\/em>\u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi\u0111i\u1ec1u g\u00ec<\/em>, th\u00ec s\u01a1 \u0111\u1ed3 th\u1eddi gian hi\u1ec3n th\u1ecbkhi n\u00e0o<\/em>c\u00e1c s\u1ef1 ki\u1ec7n x\u1ea3y ra. N\u00f3 v\u1ebd m\u1ee9c \u0111i\u1ec7n \u00e1p theo tr\u1ee5c th\u1eddi gian, gi\u00fap c\u00e1c k\u1ef9 s\u01b0 th\u1ea5y \u0111\u01b0\u1ee3c th\u1ee9 t\u1ef1 c\u00e1c s\u1ef1 ki\u1ec7n.<\/p>\n

Nh\u1eefng bi\u1ec3u \u0111\u1ed3 n\u00e0y l\u00e0 kh\u00f4ng th\u1ec3 thi\u1ebfu v\u00ec m\u1ed9t s\u1ed1 l\u00fd do sau:<\/p>\n

    \n
  • G\u1ee1 l\u1ed7i:<\/strong>Ch\u00fang ti\u1ebft l\u1ed9 c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ea1nh tranh khi c\u00e1c t\u00edn hi\u1ec7u \u0111\u1ebfn kh\u00f4ng \u0111\u00fang th\u1ee9 t\u1ef1.<\/li>\n
  • X\u00e1c minh:<\/strong>Ch\u00fang x\u00e1c nh\u1eadn r\u1eb1ng m\u1ea1ch \u0111i\u1ec7n \u0111\u00e1p \u1ee9ng c\u00e1c th\u00f4ng s\u1ed1 t\u1ed1c \u0111\u1ed9 y\u00eau c\u1ea7u.<\/li>\n
  • T\u00e0i li\u1ec7u tham kh\u1ea3o:<\/strong>Ch\u00fang \u0111\u00f3ng vai tr\u00f2 l\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o v\u1ec1 c\u00e1ch c\u00e1c chip kh\u00e1c nhau giao ti\u1ebfp v\u1edbi nhau.<\/li>\n
  • Thi\u1ebft k\u1ebf:<\/strong>Ch\u00fang gi\u00fap x\u00e1c \u0111\u1ecbnh t\u1ea7n s\u1ed1 \u0111\u1ed3ng h\u1ed3 t\u1ed1i \u0111a m\u00e0 h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3.<\/li>\n<\/ul>\n

    Khi b\u1ea1n nh\u00ecn v\u00e0o m\u1ed9t s\u01a1 \u0111\u1ed3 th\u1eddi gian, b\u1ea1n \u0111ang xem m\u1ed9t b\u1ee9c \u1ea3nh t\u0129nh v\u1ec1 h\u00e0nh vi v\u1eadt l\u00fd c\u1ee7a c\u00e1c electron di chuy\u1ec3n qua h\u1ec7 th\u1ed1ng. N\u00f3 ghi l\u1ea1i th\u1ef1c t\u1ebf v\u1ec1 \u0111\u1ed9 tr\u1ec5, lan truy\u1ec1n v\u00e0 \u0111\u1ed3ng b\u1ed9 h\u00f3a.<\/p>\n

    \ud83d\udcca C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian<\/h2>\n

    Tr\u01b0\u1edbc khi ph\u00e2n t\u00edch c\u00e1c d\u1ea1ng s\u00f3ng ph\u1ee9c t\u1ea1p, b\u1ea1n ph\u1ea3i hi\u1ec3u r\u00f5 c\u00e1c kh\u1ed1i x\u00e2y d\u1ef1ng c\u01a1 b\u1ea3n. M\u1ed7i s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ec1u g\u1ed3m m\u1ed9t v\u00e0i th\u00e0nh ph\u1ea7n n\u1ec1n t\u1ea3ng.<\/p>\n

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

    Tr\u1ee5c n\u1eb1m ngang \u0111\u1ea1i di\u1ec7n cho th\u1eddi gian. N\u00f3 ch\u1ea3y t\u1eeb tr\u00e1i sang ph\u1ea3i. Trong thi\u1ebft k\u1ebf s\u1ed1, tr\u1ee5c n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c chu k\u1ef3 \u0111\u1ed3ng h\u1ed3, \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u b\u1eb1ng c\u00e1c \u0111\u01b0\u1eddng l\u01b0\u1edbi th\u1eb3ng \u0111\u1ee9ng. Thang \u0111o c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u1eeb nanosecond (ns) cho c\u00e1c b\u1ed9 x\u1eed l\u00fd t\u1ed1c \u0111\u1ed9 cao \u0111\u1ebfn milisecond (ms) cho logic \u0111i\u1ec1u khi\u1ec3n ch\u1eadm h\u01a1n.<\/p>\n

    2. Tr\u1ee5c m\u1ee9c \u0111i\u1ec7n \u00e1p<\/h3>\n

    Tr\u1ee5c th\u1eb3ng \u0111\u1ee9ng \u0111\u1ea1i di\u1ec7n cho tr\u1ea1ng th\u00e1i logic c\u1ee7a t\u00edn hi\u1ec7u. Trong c\u00e1c h\u1ecd logic ti\u00eau chu\u1ea9n, \u0111i\u1ec1u n\u00e0y th\u01b0\u1eddng l\u00e0 nh\u1ecb ph\u00e2n:<\/p>\n

      \n
    • Logic Cao (1):<\/strong>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n l\u00e0 VCC ho\u1eb7c 5V.<\/li>\n
    • Logic Th\u1ea5p (0):<\/strong> Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n l\u00e0 M\u1ea1ch \u0111\u1ea5t ho\u1eb7c 0V.<\/li>\n
    • High-Z (Tr\u1edf kh\u00e1ng cao):<\/strong> M\u1ed9t tr\u1ea1ng th\u00e1i m\u00e0 ch\u00e2n b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i hi\u1ec7u qu\u1ea3, ph\u1ed5 bi\u1ebfn trong c\u00e1c h\u1ec7 th\u1ed1ng bus.<\/li>\n<\/ul>\n

      3. D\u00e2y t\u00edn hi\u1ec7u<\/h3>\n

      M\u1ed7i \u0111\u01b0\u1eddng ngang \u0111\u1ea1i di\u1ec7n cho m\u1ed9t d\u00e2y c\u1ee5 th\u1ec3 ho\u1eb7c t\u00ean t\u00edn hi\u1ec7u. C\u00e1c \u0111\u01b0\u1eddng n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n r\u00f5 r\u00e0ng (v\u00ed d\u1ee5: CLK, DATA_IN, CS) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ph\u1ea7n n\u00e0o c\u1ee7a m\u1ea1ch \u0111ang \u0111\u01b0\u1ee3c theo d\u00f5i.<\/p>\n

      \ud83d\udd04 \u0110\u1ecdc c\u00e1c chuy\u1ec3n ti\u1ebfp t\u00edn hi\u1ec7u<\/h2>\n

      Chuy\u1ec3n \u0111\u1ed9ng l\u00ean xu\u1ed1ng c\u1ee7a \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u ch\u00ednh l\u00e0 n\u01a1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef. Hi\u1ec3u \u0111\u01b0\u1ee3c h\u01b0\u1edbng di chuy\u1ec3n n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n

      \u2b06\ufe0f C\u1ea1nh l\u00ean<\/h3>\n

      C\u1ea1nh l\u00ean x\u1ea3y ra khi t\u00edn hi\u1ec7u chuy\u1ec3n t\u1eeb th\u1ea5p sang cao. Trong logic nh\u1ecb ph\u00e2n, \u0111\u00e2y th\u01b0\u1eddng l\u00e0 \u0111i\u1ec3m k\u00edch ho\u1ea1t cho nhi\u1ec1u thao t\u00e1c. N\u00f3 \u0111\u1ea1i di\u1ec7n cho s\u1ef1 thay \u0111\u1ed5i t\u1eeb 0 sang 1.<\/p>\n

      \u2b07\ufe0f C\u1ea1nh xu\u1ed1ng<\/h3>\n

      C\u1ea1nh xu\u1ed1ng x\u1ea3y ra khi t\u00edn hi\u1ec7u chuy\u1ec3n t\u1eeb cao sang th\u1ea5p. \u0110i\u1ec1u n\u00e0y \u0111\u1ea1i di\u1ec7n cho s\u1ef1 thay \u0111\u1ed5i t\u1eeb 1 sang 0.<\/p>\n

      \u26a1 K\u00edch ho\u1ea1t theo c\u1ea1nh<\/h3>\n

      Nhi\u1ec1u th\u00e0nh ph\u1ea7n s\u1ed1, nh\u01b0 flip-flop, ch\u1ec9 ph\u1ea3n \u1ee9ng v\u1edbi c\u00e1c c\u1ea1nh n\u00e0y thay v\u00ec tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh. M\u1ed9t flip-flop c\u00f3 th\u1ec3 ch\u1ec9 thu th\u1eadp d\u1eef li\u1ec7u t\u1ea1i c\u1ea1nh l\u00ean<\/strong>c\u1ee7a t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3. N\u1ebfu b\u1ea1n b\u1ecf l\u1ee1 c\u1ea1nh n\u00e0y, d\u1eef li\u1ec7u s\u1ebd b\u1ecb m\u1ea5t.<\/p>\n\n\n\n\n\n\n\n\n
      Chuy\u1ec3n ti\u1ebfp<\/th>\nH\u01b0\u1edbng<\/th>\nThay \u0111\u1ed5i nh\u1ecb ph\u00e2n<\/th>\nLo\u1ea1i k\u00edch ho\u1ea1t ph\u1ed5 bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n
      C\u1ea1nh l\u00ean<\/td>\nTh\u1ea5p \u2794 Cao<\/td>\n0 \u2794 1<\/td>\nK\u00edch ho\u1ea1t theo c\u1ea1nh d\u01b0\u01a1ng<\/td>\n<\/tr>\n
      C\u1ea1nh xu\u1ed1ng<\/td>\nCao \u2794 Th\u1ea5p<\/td>\n1 \u2794 0<\/td>\nK\u00edch ho\u1ea1t theo c\u1ea1nh \u00e2m<\/td>\n<\/tr>\n
      M\u1ee9c cao<\/td>\nCao \u1ed5n \u0111\u1ecbnh<\/td>\n1 \u1ed5n \u0111\u1ecbnh<\/td>\nNh\u1ea1y m\u1ee9c<\/td>\n<\/tr>\n
      M\u1ee9c th\u1ea5p<\/td>\nTh\u1ea5p \u1ed5n \u0111\u1ecbnh<\/td>\n\u1ed4n \u0111\u1ecbnh 0<\/td>\nNh\u1ea1y m\u1ee9c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u23f3 C\u00e1c tham s\u1ed1 th\u1eddi gian quan tr\u1ecdng<\/h2>\n

      S\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00f4ng ch\u1ec9 l\u00e0 nh\u1eefng b\u1ee9c tranh; ch\u00fang ch\u1ee9a c\u00e1c ph\u00e9p \u0111o. Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c thay \u0111\u1ed5i t\u00edn hi\u1ec7u l\u00e0 n\u01a1i x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 tin c\u1eady. Ba tham s\u1ed1 c\u1ee5 th\u1ec3 chi\u1ebfm \u01b0u th\u1ebf trong ph\u00e2n t\u00edch th\u1eddi gian k\u1ef9 thu\u1eadt s\u1ed1.<\/p>\n

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

      T\u00edn hi\u1ec7u kh\u00f4ng di chuy\u1ec3n ngay l\u1eadp t\u1ee9c. Khi \u0111\u1ea7u v\u00e0o thay \u0111\u1ed5i, s\u1ebd m\u1ea5t m\u1ed9t kho\u1ea3ng th\u1eddi gian h\u1eefu h\u1ea1n \u0111\u1ec3 \u0111\u1ea7u ra ph\u1ea3n \u00e1nh s\u1ef1 thay \u0111\u1ed5i \u0111\u00f3. \u0110\u00e2y ch\u00ednh l\u00e0 th\u1eddi gian lan truy\u1ec1n. N\u00f3 \u0111\u01b0\u1ee3c g\u00e2y ra b\u1edfi \u0111i\u1ec7n tr\u1edf v\u00e0 \u0111i\u1ec7n dung v\u1eadt l\u00fd c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n

        \n
      • \u0110\u1ecbnh ngh\u0129a:<\/strong> Kho\u1ea3ng th\u1eddi gian gi\u1eefa s\u1ef1 thay \u0111\u1ed5i \u0111\u1ea7u v\u00e0o v\u00e0 s\u1ef1 thay \u0111\u1ed5i \u0111\u1ea7u ra.<\/li>\n
      • T\u00e1c \u0111\u1ed9ng:<\/strong> Trong m\u1ed9t chu\u1ed7i c\u1ed5ng logic, c\u00e1c \u0111\u1ed9 tr\u1ec5 t\u00edch l\u0169y l\u1ea1i v\u1edbi nhau. N\u1ebfu \u0111\u1ed9 tr\u1ec5 qu\u00e1 d\u00e0i, t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 \u0111\u1ebfn sau khi chu k\u1ef3 \u0111\u1ed3ng h\u1ed3 ti\u1ebfp theo \u0111\u00e3 b\u1eaft \u0111\u1ea7u, d\u1eabn \u0111\u1ebfn l\u1ed7i.<\/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 y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi t\u00edn hi\u1ec7u d\u1eef li\u1ec7u ph\u1ea3i \u1ed5n \u0111\u1ecbnh tr\u01b0\u1edbc<\/em> m\u1ed9t c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfn. N\u1ebfu d\u1eef li\u1ec7u thay \u0111\u1ed5i qu\u00e1 g\u1ea7n c\u1ea1nh \u0111\u1ed3ng h\u1ed3, m\u1ea1ch nh\u1eadn kh\u00f4ng th\u1ec3 thu \u0111\u01b0\u1ee3c n\u00f3 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n

          \n
        • Quy t\u1eafc:<\/strong> D\u1eef li\u1ec7u ph\u1ea3i h\u1ee3p l\u1ec7 trong m\u1ed9t kho\u1ea3ng th\u1eddi gian c\u1ee5 th\u1ec3 tr\u01b0\u1edbc khi \u0111\u1ed3ng h\u1ed3 k\u00edch ho\u1ea1t.<\/li>\n
        • Tr\u1ef1c quan:<\/strong> Tr\u00ean s\u01a1 \u0111\u1ed3, \u0111\u00e2y l\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa th\u1eddi \u0111i\u1ec3m \u0111\u01b0\u1eddng d\u1eef li\u1ec7u \u1ed5n \u0111\u1ecbnh v\u00e0 c\u1ea1nh \u0111\u1ed3ng h\u1ed3.<\/li>\n<\/ul>\n

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

          Th\u1eddi gian gi\u1eef l\u00e0 y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi t\u00edn hi\u1ec7u d\u1eef li\u1ec7u ph\u1ea3i duy tr\u00ec \u1ed5n \u0111\u1ecbnh sau<\/em> khi c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfn. N\u1ebfu d\u1eef li\u1ec7u thay \u0111\u1ed5i ngay l\u1eadp t\u1ee9c sau c\u1ea1nh \u0111\u1ed3ng h\u1ed3, m\u1ea1ch c\u00f3 th\u1ec3 kh\u00f4ng ghi \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb \u0111\u00fang.<\/p>\n

            \n
          • Quy t\u1eafc:<\/strong>D\u1eef li\u1ec7u ph\u1ea3i kh\u00f4ng thay \u0111\u1ed5i trong m\u1ed9t kho\u1ea3ng th\u1eddi gian x\u00e1c \u0111\u1ecbnh sau khi \u0111\u1ed3ng h\u1ed3 k\u00edch ho\u1ea1t.<\/li>\n
          • Tr\u1ef1c quan:<\/strong>Tr\u00ean s\u01a1 \u0111\u1ed3, \u0111\u00e2y l\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa c\u1ea1nh \u0111\u1ed3ng h\u1ed3 v\u00e0 chuy\u1ec3n ti\u1ebfp d\u1eef li\u1ec7u ti\u1ebfp theo.<\/li>\n<\/ul>\n

            \u26a0\ufe0f Kho\u1ea3ng th\u1eddi gian th\u1eddi gian<\/h3>\n

            S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 th\u1eddi gian gi\u1eef t\u1ea1o th\u00e0nh m\u1ed9t kho\u1ea3ng th\u1eddi gian h\u1ee3p l\u1ec7 \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u. N\u1ebfu s\u01a1 \u0111\u1ed3 th\u1eddi gian c\u1ee7a b\u1ea1n cho th\u1ea5y d\u1eef li\u1ec7u thay \u0111\u1ed5i trong kho\u1ea3ng th\u1eddi gian n\u00e0y, h\u1ec7 th\u1ed1ng c\u00f3 nguy c\u01a1 th\u1ea5t b\u1ea1i.<\/p>\n

            \u26a1 H\u1ec7 th\u1ed1ng \u0111\u1ed3ng b\u1ed9 so v\u1edbi h\u1ec7 th\u1ed1ng b\u1ea5t \u0111\u1ed3ng b\u1ed9<\/h2>\n

            S\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00e1c nhau \u0111\u00e1ng k\u1ec3 t\u00f9y thu\u1ed9c v\u00e0o ki\u1ebfn tr\u00fac c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

            H\u1ec7 th\u1ed1ng \u0111\u1ed3ng b\u1ed9<\/h3>\n

            Trong thi\u1ebft k\u1ebf \u0111\u1ed3ng b\u1ed9, m\u1ecdi thao t\u00e1c \u0111\u1ec1u \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p b\u1edfi t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 to\u00e0n c\u1ee5c. M\u1ecdi thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i \u0111\u1ec1u x\u1ea3y ra t\u1ea1i c\u1ea1nh c\u1ee7a \u0111\u1ed3ng h\u1ed3 n\u00e0y. S\u01a1 \u0111\u1ed3 th\u1eddi gian cho c\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y tr\u00f4ng r\u1ea5t \u0111\u1ec1u \u0111\u1eb7n.<\/p>\n

              \n
            • \u0110\u1eb7c \u0111i\u1ec3m:<\/strong>D\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c, d\u1ec5 thi\u1ebft k\u1ebf h\u01a1n, b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi t\u1ed1c \u0111\u1ed9 \u0111\u1ed3ng h\u1ed3.<\/li>\n
            • H\u00ecnh d\u1ea1ng s\u01a1 \u0111\u1ed3:<\/strong>C\u00e1c \u0111\u01b0\u1eddng l\u01b0\u1edbi d\u1ecdc \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh ho\u00e0n h\u1ea3o v\u1edbi m\u1ecdi thay \u0111\u1ed5i t\u00edn hi\u1ec7u.<\/li>\n<\/ul>\n

              H\u1ec7 th\u1ed1ng b\u1ea5t \u0111\u1ed3ng b\u1ed9<\/h3>\n

              Trong thi\u1ebft k\u1ebf b\u1ea5t \u0111\u1ed3ng b\u1ed9, kh\u00f4ng c\u00f3 \u0111\u1ed3ng h\u1ed3 to\u00e0n c\u1ee5c. C\u00e1c t\u00edn hi\u1ec7u thay \u0111\u1ed5i b\u1ea5t c\u1ee9 khi n\u00e0o \u0111\u1ea7u v\u00e0o thay \u0111\u1ed5i. \u0110i\u1ec1u n\u00e0y mang l\u1ea1i ti\u1ec1m n\u0103ng t\u1ed1c \u0111\u1ed9 cao h\u01a1n nh\u01b0ng khi\u1ebfn ph\u00e2n t\u00edch th\u1eddi gian tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n nhi\u1ec1u.<\/p>\n

                \n
              • \u0110\u1eb7c \u0111i\u1ec3m:<\/strong>Ph\u1ea3n \u1ee9ng nhanh h\u01a1n v\u1edbi \u0111\u1ea7u v\u00e0o, ph\u00e2n t\u00edch nguy c\u01a1 ph\u1ee9c t\u1ea1p.<\/li>\n
              • H\u00ecnh d\u1ea1ng s\u01a1 \u0111\u1ed3:<\/strong>C\u00e1c chuy\u1ec3n ti\u1ebfp t\u00edn hi\u1ec7u x\u1ea3y ra \u1edf c\u00e1c kho\u1ea3ng c\u00e1ch kh\u00f4ng \u0111\u1ec1u. B\u1ea1n ph\u1ea3i \u0111o ch\u00ednh x\u00e1c kho\u1ea3ng th\u1eddi gian gi\u1eefa c\u00e1c s\u1ef1 ki\u1ec7n.<\/li>\n<\/ul>\n

                \ud83d\udcdd C\u00e1ch v\u1ebd s\u01a1 \u0111\u1ed3 th\u1eddi gian<\/h2>\n

                Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh c\u00f3 h\u1ec7 th\u1ed1ng. L\u00e0m theo c\u00e1c b\u01b0\u1edbc n\u00e0y \u0111\u1ec3 ghi ch\u00e9p l\u1ea1i m\u1ea1ch \u0111i\u1ec7n ho\u1eb7c x\u00e1c minh m\u1ed9t thi\u1ebft k\u1ebf.<\/p>\n

                  \n
                1. X\u00e1c \u0111\u1ecbnh c\u00e1c t\u00edn hi\u1ec7u:<\/strong>Li\u1ec7t k\u00ea t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ea7u v\u00e0o, \u0111\u1ea7u ra v\u00e0 c\u00e1c \u0111\u01b0\u1eddng \u0111i\u1ec1u khi\u1ec3n n\u1ed9i b\u1ed9. Ghi nh\u00e3n ch\u00fang m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng.<\/li>\n
                2. Thi\u1ebft l\u1eadp c\u01a1 s\u1edf th\u1eddi gian:<\/strong>Quy\u1ebft \u0111\u1ecbnh thang th\u1eddi gian. \u0110\u1ed1i v\u1edbi m\u1ea1ch logic, chu k\u1ef3 \u0111\u1ed3ng h\u1ed3 th\u01b0\u1eddng l\u00e0 \u0111\u01a1n v\u1ecb chu\u1ea9n.<\/li>\n
                3. V\u1ebd t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3:<\/strong>Lu\u00f4n v\u1ebd t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 tr\u01b0\u1edbc ti\u00ean. N\u00f3 l\u00e0 tham chi\u1ebfu cho t\u1ea5t c\u1ea3 c\u00e1c s\u1ef1 ki\u1ec7n kh\u00e1c.<\/li>\n
                4. X\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1ea7u v\u00e0o<\/strong> V\u1ebd c\u00e1c d\u1ea1ng s\u00f3ng \u0111\u1ea7u v\u00e0o d\u1ef1a tr\u00ean thao t\u00e1c logic ho\u1eb7c tr\u00ecnh t\u1ef1 ki\u1ec3m tra.<\/li>\n
                5. T\u00ednh to\u00e1n c\u00e1c \u0111\u1ed9 tr\u1ec5:<\/strong> D\u1ecbch c\u00e1c t\u00edn hi\u1ec7u \u0111\u1ea7u ra sang ph\u1ea3i d\u1ef1a tr\u00ean \u0111\u1ed9 tr\u1ec5 lan truy\u1ec1n c\u1ee7a c\u00e1c c\u1ed5ng li\u00ean quan.<\/li>\n
                6. Ki\u1ec3m tra c\u00e1c r\u00e0ng bu\u1ed9c:<\/strong> X\u00e1c minh r\u1eb1ng th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 th\u1eddi gian gi\u1eef \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng cho m\u1ed7i flip-flop.<\/li>\n
                7. Xem x\u00e9t c\u00e1c chuy\u1ec3n \u0111\u1ed5i:<\/strong> \u0110\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea3y (glitch). M\u1ed9t glitch l\u00e0 m\u1ed9t xung ng\u1eafn, kh\u00f4ng mong mu\u1ed1n c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t logic sai c\u00e1ch.<\/li>\n<\/ol>\n

                  \ud83d\udd04 V\u00ed d\u1ee5 th\u1ef1c t\u1ebf: M\u1ed9t b\u1ed9 \u0111\u1ebfm \u0111\u01a1n gi\u1ea3n<\/h2>\n

                  \u0110\u1ec3 h\u00ecnh dung c\u00e1ch c\u00e1c kh\u00e1i ni\u1ec7m n\u00e0y ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau, h\u00e3y xem x\u00e9t m\u1ed9t b\u1ed9 \u0111\u1ebfm nh\u1ecb ph\u00e2n 3 bit \u0111\u01a1n gi\u1ea3n. M\u1ea1ch n\u00e0y t\u0103ng gi\u00e1 tr\u1ecb m\u1ed7i khi t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 xung ph\u00e1t ra.<\/p>\n

                  H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng ba \u0111\u01b0\u1eddng \u0111\u1ea7u ra: Q0, Q1 v\u00e0 Q2. Q0 chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i \u1edf m\u1ed7i chu k\u1ef3 \u0111\u1ed3ng h\u1ed3. Q1 chuy\u1ec3n \u0111\u1ed5i m\u1ed7i khi Q0 ho\u00e0n th\u00e0nh m\u1ed9t chu k\u1ef3 \u0111\u1ea7y \u0111\u1ee7. Q2 chuy\u1ec3n \u0111\u1ed5i m\u1ed7i khi Q1 ho\u00e0n th\u00e0nh m\u1ed9t chu k\u1ef3 \u0111\u1ea7y \u0111\u1ee7.<\/p>\n

                  Ph\u00e2n t\u00edch t\u1eebng b\u01b0\u1edbc<\/h3>\n
                    \n
                  • \u0110\u1ed3ng h\u1ed3 (CLK):<\/strong> M\u1ed9t s\u00f3ng vu\u00f4ng v\u1edbi chu k\u1ef3 ho\u1ea1t \u0111\u1ed9ng 50%.<\/li>\n
                  • Q0 (bit th\u1ea5p nh\u1ea5t):<\/strong> Thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i \u1edf m\u1ed7i c\u1ea1nh t\u0103ng c\u1ee7a \u0111\u1ed3ng h\u1ed3. T\u1ea7n s\u1ed1 b\u1eb1ng m\u1ed9t n\u1eeda t\u1ea7n s\u1ed1 \u0111\u1ed3ng h\u1ed3.<\/li>\n
                  • Q1:<\/strong> Thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i \u1edf m\u1ed7i c\u1ea1nh t\u0103ng c\u1ee7a Q0. T\u1ea7n s\u1ed1 b\u1eb1ng m\u1ed9t n\u1eeda t\u1ea7n s\u1ed1 Q0.<\/li>\n
                  • Q2 (bit cao nh\u1ea5t):<\/strong> Thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i \u1edf m\u1ed7i c\u1ea1nh t\u0103ng c\u1ee7a Q1. T\u1ea7n s\u1ed1 b\u1eb1ng m\u1ed9t n\u1eeda t\u1ea7n s\u1ed1 Q1.<\/li>\n<\/ul>\n

                    Khi v\u1ebd s\u01a1 \u0111\u1ed3 n\u00e0y, b\u1ea1n s\u1ebd nh\u1eadn th\u1ea5y hi\u1ec7u \u1ee9ng lan truy\u1ec1n. Q0 thay \u0111\u1ed5i tr\u01b0\u1edbc ti\u00ean. Q1 ch\u1edd Q0 \u1ed5n \u0111\u1ecbnh tr\u01b0\u1edbc khi thay \u0111\u1ed5i. Q2 ch\u1edd Q1. S\u1ef1 t\u00edch l\u0169y \u0111\u1ed9 tr\u1ec5 n\u00e0y ch\u00ednh l\u00e0 b\u1ea3n ch\u1ea5t c\u1ee7a b\u1ed9 \u0111\u1ebfm lan truy\u1ec1n.<\/p>\n\n\n\n\n\n\n\n\n\n
                    Chu k\u1ef3 \u0111\u1ed3ng h\u1ed3<\/th>\nQ2<\/th>\nQ1<\/th>\nQ0<\/th>\nGi\u00e1 tr\u1ecb th\u1eadp ph\u00e2n<\/th>\n<\/tr>\n<\/thead>\n
                    1<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n<\/tr>\n
                    2<\/td>\n0<\/td>\n0<\/td>\n1<\/td>\n1<\/td>\n<\/tr>\n
                    3<\/td>\n0<\/td>\n1<\/td>\n0<\/td>\n2<\/td>\n<\/tr>\n
                    4<\/td>\n0<\/td>\n1<\/td>\n1<\/td>\n3<\/td>\n<\/tr>\n
                    5<\/td>\n1<\/td>\n0<\/td>\n0<\/td>\n4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                    \u26a0\ufe0f Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh<\/h2>\n

                    Ngay c\u1ea3 nh\u1eefng k\u1ef9 s\u01b0 c\u00f3 kinh nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 m\u1eafc sai l\u1ea7m khi \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian. H\u00e3y c\u1ea3nh gi\u00e1c v\u1edbi nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn n\u00e0y.<\/p>\n

                      \n
                    • B\u1ecf qua c\u00e1c xung nhi\u1ec5u:<\/strong>M\u1ed9t xung ng\u1eafn c\u00f3 th\u1ec3 kh\u00f4ng hi\u1ec3n th\u1ecb r\u00f5 n\u1ebfu thang th\u1eddi gian qu\u00e1 l\u1edbn, nh\u01b0ng n\u00f3 v\u1eabn c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t m\u1ed9t b\u1ed9 nh\u1edb gi\u1eef. Lu\u00f4n ki\u1ec3m tra c\u00e1c xung h\u1eb9p.<\/li>\n
                    • Hi\u1ec3u sai chu k\u1ef3 l\u00e0m vi\u1ec7c:<\/strong>Cho r\u1eb1ng t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 l\u00e0 50% khi th\u1ef1c t\u1ebf l\u1ea1i b\u1ecb l\u1ec7ch. \u0110i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kho\u1ea3ng th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng.<\/li>\n
                    • B\u1ecf qua tr\u1ea1ng th\u00e1i High-Z:<\/strong>Trong c\u00e1c h\u1ec7 th\u1ed1ng bus, c\u00e1c \u0111\u01b0\u1eddng d\u00e2y s\u1ebd \u1edf tr\u1ea1ng th\u00e1i tr\u00f4i. S\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3i th\u1ec3 hi\u1ec7n r\u00f5 khi n\u00e0o m\u1ed9t \u0111\u01b0\u1eddng d\u00e2y \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n v\u00e0 khi n\u00e0o n\u00f3 \u0111ang tr\u00f4i.<\/li>\n
                    • Nh\u1ea7m l\u1eabn gi\u1eefa Setup v\u00e0 Hold:<\/strong>Setup x\u1ea3y ra tr\u01b0\u1edbc c\u1ea1nh; Hold x\u1ea3y ra sau. Vi\u1ec7c nh\u1ea7m l\u1eabn gi\u1eefa hai kh\u00e1i ni\u1ec7m n\u00e0y d\u1eabn \u0111\u1ebfn thi\u1ebft k\u1ebf m\u1ea1ch sai.<\/li>\n
                    • B\u1ecf qua tham chi\u1ebfu \u0111\u1ea5t:<\/strong> T\u1ea5t c\u1ea3 c\u00e1c m\u1ee9c \u0111i\u1ec7n \u00e1p ph\u1ea3i \u0111\u01b0\u1ee3c \u0111o so v\u1edbi c\u00f9ng m\u1ed9t \u0111i\u1ec3m \u0111\u1ea5t. N\u1ebfu c\u00e1c \u0111i\u1ec3m \u0111\u1ea5t kh\u00e1c nhau, c\u00e1c m\u1ee9c logic s\u1ebd kh\u00f4ng h\u1ee3p l\u1ec7.<\/li>\n<\/ul>\n

                      \ud83d\udee0 C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho t\u00e0i li\u1ec7u<\/h2>\n

                      Khi t\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian cho m\u1ee5c \u0111\u00edch t\u00e0i li\u1ec7u ho\u1eb7c g\u1ee1 l\u1ed7i, h\u00e3y tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 r\u00f5 r\u00e0ng.<\/p>\n

                        \n
                      • S\u1eed d\u1ee5ng thang \u0111o nh\u1ea5t qu\u00e1n:<\/strong> \u0110\u1ea3m b\u1ea3o tr\u1ee5c th\u1eddi gian l\u00e0 tuy\u1ebfn t\u00ednh. Kh\u00f4ng \u0111\u01b0\u1ee3c n\u00e9n m\u1ed9t ph\u1ea7n v\u00e0 k\u00e9o d\u00e0i ph\u1ea7n kh\u00e1c tr\u1eeb khi \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u r\u00f5 r\u00e0ng.<\/li>\n
                      • \u0110\u1ed3ng b\u1ed9 c\u00e1c c\u1ea1nh quan tr\u1ecdng:<\/strong> \u0110\u1ea3m b\u1ea3o c\u1ea1nh xung nh\u1ecbp \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 ho\u00e0n h\u1ea3o v\u1edbi \u0111i\u1ec3m l\u1ea5y m\u1eabu d\u1eef li\u1ec7u.<\/li>\n
                      • Ghi nh\u00e3n c\u00e1c kho\u1ea3ng tr\u1ed1ng:<\/strong> N\u1ebfu c\u00f3 \u0111\u1ed9 tr\u1ec5, h\u00e3y ghi nh\u00e3n b\u1eb1ng gi\u00e1 tr\u1ecb th\u1eddi gian c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: tpd<\/sub> = 5ns).<\/li>\n
                      • M\u00e3 m\u00e0u:<\/strong> S\u1eed d\u1ee5ng c\u00e1c m\u00e0u kh\u00e1c nhau cho c\u00e1c lo\u1ea1i t\u00edn hi\u1ec7u kh\u00e1c nhau (v\u00ed d\u1ee5: xanh d\u01b0\u01a1ng cho xung nh\u1ecbp, \u0111\u1ecf cho d\u1eef li\u1ec7u, xanh l\u00e1 cho \u0111i\u1ec1u khi\u1ec3n).<\/li>\n
                      • Ghi ch\u00fa tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng:<\/strong> R\u00f5 r\u00e0ng ch\u1ec9 ra t\u00edn hi\u1ec7u \u0111ang ho\u1ea1t \u0111\u1ed9ng cao hay ho\u1ea1t \u0111\u1ed9ng th\u1ea5p (v\u00ed d\u1ee5: s\u1eed d\u1ee5ng thanh g\u1ea1ch tr\u00ean t\u00ean nh\u01b0 \/CS).<\/li>\n<\/ul>\n

                        \ud83e\udde9 Hi\u1ec7n t\u01b0\u1ee3ng b\u1ea5t \u1ed5n v\u00e0 nguy c\u01a1 sai l\u1ec7ch th\u1eddi gian<\/h2>\n

                        C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian n\u00e2ng cao th\u01b0\u1eddng ti\u1ebft l\u1ed9 hi\u1ec7n t\u01b0\u1ee3ng g\u1ecdi l\u00e0 b\u1ea5t \u1ed5n. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y x\u1ea3y ra khi m\u1ed9t t\u00edn hi\u1ec7u thay \u0111\u1ed5i \u0111\u00fang v\u00e0o kho\u1ea3ng th\u1eddi gian thi\u1ebft l\u1eadp\/gi\u1eef c\u1ee7a m\u1ed9t flip-flop. \u0110\u1ea7u ra kh\u00f4ng \u1ed5n \u0111\u1ecbnh ngay l\u1eadp t\u1ee9c th\u00e0nh 0 hay 1; thay v\u00e0o \u0111\u00f3, n\u00f3 l\u01a1 l\u1eedng \u1edf m\u1ee9c \u0111i\u1ec7n \u00e1p trung gian.<\/p>\n

                        M\u1eb7c d\u00f9 hi\u1ebfm, nh\u01b0ng hi\u1ec7n t\u01b0\u1ee3ng b\u1ea5t \u1ed5n c\u00f3 th\u1ec3 g\u00e2y s\u1eadp h\u1ec7 th\u1ed1ng. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian gi\u00fap d\u1ef1 \u0111o\u00e1n \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u b\u1ea5t \u0111\u1ed3ng b\u1ed9 v\u00e0 \u0111\u1ed3ng b\u1ed9 nh\u1ecbp. N\u1ebfu m\u1ed9t t\u00edn hi\u1ec7u b\u00ean ngo\u00e0i thay \u0111\u1ed5i qu\u00e1 g\u1ea7n c\u1ea1nh xung nh\u1ecbp, s\u01a1 \u0111\u1ed3 s\u1ebd cho th\u1ea5y d\u1eef li\u1ec7u v\u01b0\u1ee3t ng\u01b0\u1ee1ng v\u00e0o th\u1eddi \u0111i\u1ec3m sai.<\/p>\n

                        \ud83d\udd0d Ph\u00e2n t\u00edch d\u1eef li\u1ec7u th\u1ef1c t\u1ebf<\/h2>\n

                        Khi b\u1ea1n xem m\u1ed9t s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi b\u1ed9 ph\u00e2n t\u00edch logic, c\u00e1c \u0111\u01b0\u1eddng bi\u1ec3u di\u1ec5n hi\u1ebfm khi l\u00e0 h\u00ecnh vu\u00f4ng ho\u00e0n h\u1ea3o. C\u00e1c t\u00edn hi\u1ec7u th\u1ef1c t\u1ebf c\u00f3:<\/p>\n

                          \n
                        • Th\u1eddi gian t\u0103ng:<\/strong> Th\u1eddi gian \u0111\u1ec3 chuy\u1ec3n t\u1eeb th\u1ea5p sang cao. Hi\u1ebfm khi x\u1ea3y ra t\u1ee9c th\u00ec.<\/li>\n
                        • Th\u1eddi gian gi\u1ea3m:<\/strong> Th\u1eddi gian \u0111\u1ec3 chuy\u1ec3n t\u1eeb cao sang th\u1ea5p.<\/li>\n
                        • S\u00f3ng qu\u00e1 m\u1ee9c\/Thi\u1ebfu m\u1ee9c:<\/strong> C\u00e1c \u0111\u1ec9nh \u0111i\u1ec7n \u00e1p v\u01b0\u1ee3t qu\u00e1 m\u1ee9c ngu\u1ed3n cung c\u1ea5p.<\/li>\n
                        • Rung \u0111\u1ed9ng:<\/strong> C\u00e1c bi\u1ebfn thi\u00ean v\u1ec1 th\u1eddi gian c\u1ee7a c\u00e1c c\u1ea1nh t\u00edn hi\u1ec7u.<\/li>\n<\/ul>\n

                          Hi\u1ec3u r\u00f5 nh\u1eefng khuy\u1ebft \u0111i\u1ec3m n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao. S\u00f3ng vu\u00f4ng ho\u00e0n h\u1ea3o ch\u1ec9 l\u00e0 m\u1ed9t l\u00fd t\u01b0\u1edfng l\u00fd thuy\u1ebft; c\u00e1c t\u00edn hi\u1ec7u th\u1ef1c t\u1ebf l\u00e0 c\u00e1c d\u1ea1ng s\u00f3ng t\u01b0\u01a1ng t\u1ef1 \u0111\u1ea1i di\u1ec7n cho logic s\u1ed1.<\/p>\n

                          \ud83d\udcda T\u00f3m t\u1eaft nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/h2>\n

                          S\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 ng\u00f4n ng\u1eef c\u1ee7a th\u1eddi gian s\u1ed1. Ch\u00fang chuy\u1ec3n \u0111\u1ed5i logic tr\u1eebu t\u01b0\u1ee3ng th\u00e0nh th\u1ef1c t\u1ebf v\u1eadt l\u00fd. B\u1eb1ng c\u00e1ch th\u00e0nh th\u1ea1o ch\u00fang, b\u1ea1n s\u1ebd c\u00f3 kh\u1ea3 n\u0103ng:<\/p>\n

                            \n
                          • Tr\u1ef1c quan h\u00f3a lu\u1ed3ng d\u1eef li\u1ec7u qua m\u1ed9t h\u1ec7 th\u1ed1ng.<\/li>\n
                          • X\u00e1c \u0111\u1ecbnh n\u01a1i c\u00e1c t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 xung \u0111\u1ed9t.<\/li>\n
                          • \u0110\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady.<\/li>\n
                          • T\u00ednh to\u00e1n t\u1ed1c \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a c\u1ee7a m\u1ed9t m\u1ea1ch.<\/li>\n<\/ul>\n

                            B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch luy\u1ec7n t\u1eadp v\u1edbi c\u00e1c c\u1ed5ng logic \u0111\u01a1n gi\u1ea3n. V\u1ebd \u0111\u1ea7u v\u00e0o, t\u00ednh \u0111\u1ed9 tr\u1ec5 v\u00e0 v\u1ebd \u0111\u1ea7u ra. Khi ti\u1ebfn b\u1ed9, h\u00e3y chuy\u1ec3n sang c\u00e1c bus ph\u1ee9c t\u1ea1p v\u00e0 c\u00e1c mi\u1ec1n \u0111\u1ed3ng h\u1ed3. V\u1edbi s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 luy\u1ec7n t\u1eadp, vi\u1ec7c \u0111\u1ecdc c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y s\u1ebd tr\u1edf n\u00ean t\u1ef1 nhi\u00ean.<\/p>\n

                            \ud83d\ude80 Ti\u1ebfn b\u01b0\u1edbc ti\u1ebfp theo<\/h2>\n

                            Ti\u1ebfp t\u1ee5c kh\u00e1m ph\u00e1 nh\u1eefng tinh t\u1ebf v\u1ec1 \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 m\u1ea1ng ph\u00e2n ph\u1ed1i \u0111\u1ed3ng h\u1ed3. Khi h\u1ec7 th\u1ed1ng tr\u1edf n\u00ean nhanh h\u01a1n, kho\u1ea3ng c\u00e1ch th\u1eddi gian s\u1ebd nh\u1ecf l\u1ea1i. Kh\u1ea3 n\u0103ng \u0111\u1ecdc ch\u00ednh x\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian s\u1ebd lu\u00f4n l\u00e0 n\u0103ng l\u1ef1c c\u1ed1t l\u00f5i \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 k\u1ef9 s\u01b0 n\u00e0o l\u00e0m vi\u1ec7c v\u1edbi ph\u1ea7n c\u1ee9ng s\u1ed1.<\/p>\n","protected":false},"excerpt":{"rendered":"

                            Trong th\u1ebf gi\u1edbi \u0111i\u1ec7n t\u1eed s\u1ed1 v\u00e0 k\u1ef9 thu\u1eadt m\u00e1y t\u00ednh, c\u00e1c t\u00edn hi\u1ec7u kh\u00f4ng t\u1ed3n t\u1ea1i trong tr\u1ea1ng th\u00e1i tr\u1ed1ng r\u1ed7ng. Ch\u00fang di chuy\u1ec3n qua c\u00e1c \u0111\u01b0\u1eddng d\u1eabn, \u0111i…<\/p>\n","protected":false},"author":1,"featured_media":1744,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"H\u01b0\u1edbng d\u1eabn S\u01a1 \u0111\u1ed3 Th\u1eddi gian: H\u1ecdc v\u1ec1 Th\u1eddi gian T\u00edn hi\u1ec7u S\u1ed1 \ud83d\udcc8","_yoast_wpseo_metadesc":"Th\u00e0nh th\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian cho \u0111i\u1ec7n t\u1eed s\u1ed1. H\u1ecdc c\u00e1ch \u0111\u1ecdc t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3, th\u1eddi gian thi\u1ebft l\u1eadp\/gi\u1eef, v\u00e0 tr\u00e1nh c\u00e1c l\u1ed7i \u0111\u1ed3ng b\u1ed9 h\u00f3a. M\u1ed9t h\u01b0\u1edbng d\u1eabn ho\u00e0n ch\u1ec9nh d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[60],"tags":[87,92],"class_list":["post-1743","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-timing-diagram"],"yoast_head":"\nH\u01b0\u1edbng d\u1eabn S\u01a1 \u0111\u1ed3 Th\u1eddi gian: H\u1ecdc v\u1ec1 Th\u1eddi gian T\u00edn hi\u1ec7u S\u1ed1 \ud83d\udcc8<\/title>\n<meta name=\"description\" content=\"Th\u00e0nh th\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian cho \u0111i\u1ec7n t\u1eed s\u1ed1. H\u1ecdc c\u00e1ch \u0111\u1ecdc t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3, th\u1eddi gian thi\u1ebft l\u1eadp\/gi\u1eef, v\u00e0 tr\u00e1nh c\u00e1c l\u1ed7i \u0111\u1ed3ng b\u1ed9 h\u00f3a. M\u1ed9t h\u01b0\u1edbng d\u1eabn ho\u00e0n ch\u1ec9nh d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u.\" \/>\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-beginners-guide-2\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"H\u01b0\u1edbng d\u1eabn S\u01a1 \u0111\u1ed3 Th\u1eddi gian: H\u1ecdc v\u1ec1 Th\u1eddi gian T\u00edn hi\u1ec7u S\u1ed1 \ud83d\udcc8\" \/>\n<meta property=\"og:description\" content=\"Th\u00e0nh th\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian cho \u0111i\u1ec7n t\u1eed s\u1ed1. H\u1ecdc c\u00e1ch \u0111\u1ecdc t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3, th\u1eddi gian thi\u1ebft l\u1eadp\/gi\u1eef, v\u00e0 tr\u00e1nh c\u00e1c l\u1ed7i \u0111\u1ed3ng b\u1ed9 h\u00f3a. 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