{"id":1568,"date":"2026-04-08T07:16:55","date_gmt":"2026-04-07T23:16:55","guid":{"rendered":"https:\/\/mayaharper.showcasingme.net\/vn\/timing-diagrams-beginners-guide-event-sequences\/"},"modified":"2026-04-08T07:16:55","modified_gmt":"2026-04-07T23:16:55","slug":"timing-diagrams-beginners-guide-event-sequences","status":"publish","type":"post","link":"https:\/\/mayaharper.showcasingme.net\/vn\/timing-diagrams-beginners-guide-event-sequences\/","title":{"rendered":"S\u01a1 \u0111\u1ed3 th\u1eddi gian: H\u01b0\u1edbng d\u1eabn d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u v\u1ec1 vi\u1ec7c tr\u1ef1c quan h\u00f3a c\u00e1c tr\u00ecnh t\u1ef1 s\u1ef1 ki\u1ec7n"},"content":{"rendered":"

Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1ch c\u00e1c h\u1ec7 th\u1ed1ng s\u1ed1 ho\u1ea1t \u0111\u1ed9ng \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c bi\u1ebft c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0o \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i; b\u1ea1n ph\u1ea3i hi\u1ec3ukhi<\/strong>c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00f3 t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau. S\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u00f3ng vai tr\u00f2 nh\u01b0 ng\u00f4n ng\u1eef tr\u1ef1c quan cho ph\u00e2n t\u00edch theo th\u1eddi gian n\u00e0y. Ch\u00fang m\u00f4 t\u1ea3 tr\u00ecnh t\u1ef1 c\u00e1c s\u1ef1 ki\u1ec7n, thay \u0111\u1ed5i t\u00edn hi\u1ec7u v\u00e0 tr\u1ea1ng th\u00e1i logic theo m\u1ed9t khung th\u1eddi gian c\u1ee5 th\u1ec3. D\u00f9 b\u1ea1n \u0111ang g\u1ee1 l\u1ed7i m\u1ed9t giao th\u1ee9c truy\u1ec1n th\u00f4ng hay thi\u1ebft k\u1ebf m\u1ed9t m\u1ea1ch logic m\u1edbi, nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p s\u1ef1 r\u00f5 r\u00e0ng c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ed3ng b\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y ph\u00e2n t\u00edch c\u00e1c y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian, c\u00e1ch hi\u1ec3u ch\u00fang v\u00e0 l\u00fd do t\u1ea1i sao ch\u00fang r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111\u00e1ng tin c\u1eady. Ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c t\u00edn hi\u1ec7u, c\u00e1c tr\u1ee5c v\u00e0 c\u00e1c tham s\u1ed1 then ch\u1ed1t \u0111\u1ecbnh ngh\u0129a cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u th\u00e0nh c\u00f4ng. \u0110\u1ebfn cu\u1ed1i v\u0103n b\u1ea3n n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc \u0111\u1ec3 \u0111\u1ecdc v\u00e0 t\u1ea1o ra nh\u1eefng c\u00f4ng c\u1ee5 tr\u1ef1c quan n\u00e0y.<\/p>\n

\"Cartoon<\/figure>\n

\ud83e\udde9 Gi\u1ea3i ph\u1eabu c\u1ee7a m\u1ed9t s\u01a1 \u0111\u1ed3 th\u1eddi gian<\/h2>\n

S\u01a1 \u0111\u1ed3 th\u1eddi gian v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t \u0111\u1ed3 th\u1ecb m\u00e0 th\u1eddi gian ch\u1ea3y theo chi\u1ec1u ngang, c\u00f2n tr\u1ea1ng th\u00e1i t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n theo chi\u1ec1u d\u1ecdc. N\u00f3 gi\u00fap c\u00e1c k\u1ef9 s\u01b0 nh\u00ecn th\u1ea5y m\u1ed1i quan h\u1ec7 gi\u1eefa nhi\u1ec1u t\u00edn hi\u1ec7u c\u00f9ng l\u00fac. Kh\u00f4ng c\u00f3 s\u1ef1 tr\u1ef1c quan h\u00f3a n\u00e0y, vi\u1ec7c theo d\u00f5i t\u01b0\u01a1ng t\u00e1c gi\u1eefa t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3, \u0111\u01b0\u1eddng d\u1eef li\u1ec7u v\u00e0 t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n s\u1ebd g\u1ea7n nh\u01b0 l\u00e0 b\u1ea5t kh\u1ea3 thi.<\/p>\n

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

Tr\u1ee5c ngang \u0111\u1ea1i di\u1ec7n cho th\u1eddi gian. R\u1ea5t quan tr\u1ecdng khi hi\u1ec3u r\u1eb1ng tr\u1ee5c n\u00e0y kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng tuy\u1ebfn t\u00ednh trong m\u1ecdi g\u00f3c nh\u00ecn, m\u1eb7c d\u00f9 c\u00e1c s\u01a1 \u0111\u1ed3 ti\u00eau chu\u1ea9n gi\u1ea3 \u0111\u1ecbnh s\u1ef1 ti\u1ebfn tri\u1ec3n tuy\u1ebfn t\u00ednh. Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c d\u1ea5u tr\u00ean tr\u1ee5c n\u00e0y c\u00f3 th\u1ec3 \u0111\u1ea1i di\u1ec7n cho nanosecond, microsecond ho\u1eb7c chu k\u1ef3 \u0111\u1ed3ng h\u1ed3, t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ea7n thi\u1ebft.<\/p>\n

    \n
  • T\u1ef7 l\u1ec7:<\/strong>Lu\u00f4n ki\u1ec3m tra t\u1ef7 l\u1ec7 th\u1eddi gian \u0111\u01b0\u1ee3c cung c\u1ea5p. M\u1ed9t s\u1ef1 d\u1ecbch chuy\u1ec3n m\u1ed9t \u0111\u01a1n v\u1ecb c\u00f3 th\u1ec3 ngh\u0129a l\u00e0 m\u1ed9t \u0111\u1ed9 tr\u1ec5 \u0111\u00e1ng k\u1ec3 trong c\u00e1c m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao.<\/li>\n
  • D\u1ea5u hi\u1ec7u:<\/strong>C\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng th\u01b0\u1eddng ch\u1ec9 ra c\u00e1c s\u1ef1 ki\u1ec7n c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u1ea1nh \u0111\u1ed3ng h\u1ed3 ho\u1eb7c t\u00edn hi\u1ec7u kh\u1edfi \u0111\u1ed9ng l\u1ea1i.<\/li>\n
  • Kho\u1ea3ng c\u00e1ch:<\/strong>Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c s\u1ef1 ki\u1ec7n l\u00e0 n\u01a1i \u0111o th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 th\u1eddi gian gi\u1eef.<\/li>\n<\/ul>\n

    2. Tr\u1ee5c t\u00edn hi\u1ec7u<\/h3>\n

    M\u1ed7i \u0111\u01b0\u1eddng ngang \u0111\u1ea1i di\u1ec7n cho m\u1ed9t t\u00edn hi\u1ec7u c\u1ee5 th\u1ec3. C\u00e1c t\u00edn hi\u1ec7u n\u00e0y th\u01b0\u1eddng l\u00e0 nh\u1ecb ph\u00e2n (Cao\/Th\u1ea5p) ho\u1eb7c \u0111a m\u1ee9c (c\u00e1c m\u1ee9c \u0111i\u1ec7n \u00e1p). V\u1ecb tr\u00ed theo chi\u1ec1u d\u1ecdc c\u1ee7a \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u gi\u00fap b\u1ea1n ph\u00e2n bi\u1ec7t n\u00f3 v\u1edbi c\u00e1c t\u00edn hi\u1ec7u kh\u00e1c m\u00e0 kh\u00f4ng b\u1ecb nh\u1ea7m l\u1eabn.<\/p>\n

      \n
    • M\u1ee9c logic:<\/strong>Cao (1) v\u00e0 Th\u1ea5p (0) l\u00e0 c\u00e1c tr\u1ea1ng th\u00e1i ti\u00eau chu\u1ea9n. \u0110\u00f4i khi, tr\u1ea1ng th\u00e1i tr\u1edf kh\u00e1ng cao (Z) \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ch\u1ec9 tr\u1ea1ng th\u00e1i ng\u1eaft k\u1ebft n\u1ed1i.<\/li>\n
    • Tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng:<\/strong>M\u1ed9t s\u1ed1 t\u00edn hi\u1ec7u l\u00e0 ho\u1ea1t \u0111\u1ed9ng th\u1ea5p, ngh\u0129a l\u00e0 tr\u1ea1ng th\u00e1i Th\u1ea5p s\u1ebd k\u00edch ho\u1ea1t h\u00e0nh \u0111\u1ed9ng. \u0110i\u1ec1u n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c ghi r\u00f5 r\u00e0ng trong ch\u00fa th\u00edch s\u01a1 \u0111\u1ed3.<\/li>\n
    • D\u1ea1ng s\u00f3ng:<\/strong>H\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u01b0\u1eddng bi\u1ec3u th\u1ecb qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i. M\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng cho th\u1ea5y s\u1ef1 thay \u0111\u1ed5i t\u1ee9c th\u00ec, trong khi \u0111\u01b0\u1eddng xi\u00ean cho th\u1ea5y \u0111\u1ed9 tr\u1ec5 lan truy\u1ec1n ho\u1eb7c th\u1eddi gian t\u0103ng\/gi\u1ea3m.<\/li>\n<\/ul>\n

      \u2699\ufe0f C\u00e1c tham s\u1ed1 v\u00e0 \u0111\u1ecbnh ngh\u0129a ch\u00ednh<\/h2>\n

      Vi\u1ec7c \u0111\u1ecdc m\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u00f2i h\u1ecfi hi\u1ec3u r\u00f5 c\u00e1c ch\u1ec9 s\u1ed1 c\u1ee5 th\u1ec3. C\u00e1c tham s\u1ed1 n\u00e0y x\u00e1c \u0111\u1ecbnh gi\u1edbi h\u1ea1n m\u00e0 trong \u0111\u00f3 h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady. N\u1ebfu v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n n\u00e0y, s\u1ebd x\u1ea3y ra l\u1ed7i d\u1eef li\u1ec7u ho\u1eb7c h\u1ecfng h\u1ec7 th\u1ed1ng.<\/p>\n

      Th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 th\u1eddi gian gi\u1eef<\/h3>\n

      \u0110\u00e2y l\u00e0 nh\u1eefng r\u00e0ng bu\u1ed9c quan tr\u1ecdng nh\u1ea5t trong thi\u1ebft k\u1ebf \u0111\u1ed3ng b\u1ed9. Ch\u00fang x\u00e1c \u0111\u1ecbnh khi n\u00e0o d\u1eef li\u1ec7u ph\u1ea3i \u1ed5n \u0111\u1ecbnh so v\u1edbi c\u1ea1nh \u0111\u1ed3ng h\u1ed3.<\/p>\n

        \n
      • Th\u1eddi gian thi\u1ebft l\u1eadp:<\/strong>Kho\u1ea3ng th\u1eddi gian t\u1ed1i thi\u1ec3u tr\u01b0\u1edbc c\u1ea1nh \u0111\u1ed3ng h\u1ed3 m\u00e0 d\u1eef li\u1ec7u ph\u1ea3i \u1ed5n \u0111\u1ecbnh. N\u1ebfu d\u1eef li\u1ec7u thay \u0111\u1ed5i qu\u00e1 g\u1ea7n c\u1ea1nh \u0111\u1ed3ng h\u1ed3, flip-flop nh\u1eadn c\u00f3 th\u1ec3 kh\u00f4ng ghi nh\u1eadn \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb \u0111\u00fang.<\/li>\n
      • Th\u1eddi gian gi\u1eef:<\/strong> Kho\u1ea3ng th\u1eddi gian t\u1ed1i thi\u1ec3u sau m\u1ed9t c\u1ea1nh \u0111\u1ed3ng h\u1ed3 m\u00e0 d\u1eef li\u1ec7u ph\u1ea3i duy tr\u00ec \u1ed5n \u0111\u1ecbnh. N\u1ebfu d\u1eef li\u1ec7u thay \u0111\u1ed5i qu\u00e1 s\u1edbm sau c\u1ea1nh \u0111\u1ed3ng h\u1ed3, gi\u00e1 tr\u1ecb tr\u01b0\u1edbc \u0111\u00f3 c\u00f3 th\u1ec3 b\u1ecb m\u1ea5t ho\u1eb7c m\u1ea1ch c\u00f3 th\u1ec3 r\u01a1i v\u00e0o tr\u1ea1ng th\u00e1i b\u1ea5t \u1ed5n.<\/li>\n<\/ul>\n\n\n\n\n\n\n\n\n
        Tham s\u1ed1<\/th>\n\u0110\u1ecbnh ngh\u0129a<\/th>\nH\u1ec7 qu\u1ea3 khi vi ph\u1ea1m<\/th>\n<\/tr>\n<\/thead>\n
        Th\u1eddi gian thi\u1ebft l\u1eadp<\/td>\nTh\u1eddi gian tr\u01b0\u1edbc c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u1ed5n \u0111\u1ecbnh<\/td>\nB\u1ecf l\u1ee1 vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u<\/td>\n<\/tr>\n
        Th\u1eddi gian gi\u1eef<\/td>\nTh\u1eddi gian sau c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u1ed5n \u0111\u1ecbnh<\/td>\nTr\u1ea1ng th\u00e1i b\u1ea5t \u1ed5n ho\u1eb7c m\u1ea5t d\u1eef li\u1ec7u<\/td>\n<\/tr>\n
        Th\u1eddi gian lan truy\u1ec1n<\/td>\nTh\u1eddi gian \u0111\u1ec3 t\u00edn hi\u1ec7u di chuy\u1ec3n<\/td>\nS\u1ef1 l\u1ec7ch pha gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u<\/td>\n<\/tr>\n
        Chu k\u1ef3<\/td>\nTh\u1eddi gian cho m\u1ed9t chu k\u1ef3 ho\u00e0n ch\u1ec9nh<\/td>\nGi\u1edbi h\u1ea1n t\u1ea7n s\u1ed1 \u0111\u1ed3ng h\u1ed3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        Th\u1eddi gian lan truy\u1ec1n<\/h3>\n

        Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u n\u00e0o di chuy\u1ec3n t\u1ee9c th\u00ec. Khi m\u1ed9t c\u1ed5ng ho\u1eb7c d\u00e2y d\u1eabn nh\u1eadn \u0111\u01b0\u1ee3c s\u1ef1 thay \u0111\u1ed5i, s\u1ebd m\u1ea5t m\u1ed9t kho\u1ea3ng th\u1eddi gian h\u1eefu h\u1ea1n \u0111\u1ec3 thay \u0111\u1ed5i \u0111\u00f3 xu\u1ea5t hi\u1ec7n \u1edf \u0111\u1ea7u ra. \u0110\u00e2y ch\u00ednh l\u00e0 th\u1eddi gian lan truy\u1ec1n. Trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p, nh\u1eefng \u0111\u1ed9 tr\u1ec5 n\u00e0y t\u00edch l\u0169y l\u1ea1i. M\u1ed9t t\u00edn hi\u1ec7u \u0111i qua nhi\u1ec1u c\u1ed5ng s\u1ebd \u0111\u1ebfn mu\u1ed9n h\u01a1n so v\u1edbi t\u00edn hi\u1ec7u \u0111i theo \u0111\u01b0\u1eddng ng\u1eafn h\u01a1n. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian th\u1ec3 hi\u1ec7n \u0111i\u1ec1u n\u00e0y d\u01b0\u1edbi d\u1ea1ng s\u1ef1 d\u1ecbch chuy\u1ec3n ngang gi\u1eefa chuy\u1ec3n ti\u1ebfp \u0111\u1ea7u v\u00e0o v\u00e0 chuy\u1ec3n ti\u1ebfp \u0111\u1ea7u ra.<\/p>\n

        Chu k\u1ef3 v\u00e0 t\u1ea7n s\u1ed1 \u0111\u1ed3ng h\u1ed3<\/h3>\n

        T\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 \u0111i\u1ec1u khi\u1ec3n vi\u1ec7c \u0111\u1ed3ng b\u1ed9 h\u00f3a c\u1ee7a h\u1ec7 th\u1ed1ng. Chu k\u1ef3 l\u00e0 kho\u1ea3ng th\u1eddi gian c\u1ee7a m\u1ed9t chu k\u1ef3 ho\u00e0n ch\u1ec9nh (Cao + Th\u1ea5p). T\u1ea7n s\u1ed1 l\u00e0 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a chu k\u1ef3. \u0110\u1ed3ng h\u1ed3 nhanh h\u01a1n c\u00f3 ngh\u0129a l\u00e0 chu k\u1ef3 ng\u1eafn h\u01a1n, \u0111i\u1ec1u n\u00e0y \u0111\u1ec3 l\u1ea1i \u00edt th\u1eddi gian h\u01a1n cho d\u1eef li\u1ec7u lan truy\u1ec1n gi\u1eefa c\u00e1c giai \u0111o\u1ea1n. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3i \u0111\u00e1nh d\u1ea5u r\u00f5 r\u00e0ng c\u00e1c c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m tham chi\u1ebfu cho t\u1ea5t c\u1ea3 c\u00e1c t\u00edn hi\u1ec7u kh\u00e1c.<\/p>\n

        \ud83d\udd04 C\u00e1c lo\u1ea1i t\u01b0\u01a1ng t\u00e1c t\u00edn hi\u1ec7u<\/h2>\n

        C\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau s\u1eed d\u1ee5ng c\u00e1c chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a kh\u00e1c nhau. S\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3n \u00e1nh c\u00e1c chi\u1ebfn l\u01b0\u1ee3c n\u00e0y.<\/p>\n

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

        Trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1ed3ng b\u1ed9, m\u1ecdi thao t\u00e1c \u0111\u1ec1u \u0111\u01b0\u1ee3c \u0111i\u1ec1u ph\u1ed1i b\u1edfi m\u1ed9t 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 m\u1ed9t c\u1ea1nh \u0111\u1ed3ng h\u1ed3 c\u1ee5 th\u1ec3 (l\u00ean ho\u1eb7c xu\u1ed1ng). \u0110i\u1ec1u n\u00e0y khi\u1ebfn ph\u00e2n t\u00edch th\u1eddi gian tr\u1edf n\u00ean d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c nh\u01b0ng l\u1ea1i gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a d\u1ef1a tr\u00ean \u0111\u1ed9 tr\u1ec5 \u0111\u01b0\u1eddng \u0111i d\u00e0i nh\u1ea5t.<\/p>\n

          \n
        • K\u00edch ho\u1ea1t theo c\u1ea1nh:<\/strong> Nh\u1eefng thay \u0111\u1ed5i ch\u1ec9 x\u1ea3y ra khi \u0111\u1ed3ng h\u1ed3 chuy\u1ec3n tr\u1ea1ng th\u00e1i (v\u00ed d\u1ee5: 0 sang 1).<\/li>\n
        • K\u00edch ho\u1ea1t theo m\u1ee9c:<\/strong> Nh\u1eefng thay \u0111\u1ed5i x\u1ea3y ra khi \u0111\u1ed3ng h\u1ed3 \u1edf tr\u1ea1ng th\u00e1i c\u1ee5 th\u1ec3 n\u00e0o \u0111\u00f3 (v\u00ed d\u1ee5: Cao).<\/li>\n<\/ul>\n

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

          C\u00e1c h\u1ec7 th\u1ed1ng b\u1ea5t \u0111\u1ed3ng b\u1ed9 kh\u00f4ng d\u1ef1a v\u00e0o \u0111\u1ed3ng h\u1ed3 to\u00e0n c\u1ee5c. C\u00e1c s\u1ef1 ki\u1ec7n \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1edfi vi\u1ec7c ho\u00e0n th\u00e0nh c\u00e1c thao t\u00e1c tr\u01b0\u1edbc \u0111\u00f3. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian cho c\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y th\u1ec3 hi\u1ec7n c\u00e1c t\u00edn hi\u1ec7u trao \u0111\u1ed5i. M\u1ed9t t\u00edn hi\u1ec7u y\u00eau c\u1ea7u d\u1eef li\u1ec7u, t\u00edn hi\u1ec7u kia x\u00e1c nh\u1eadn vi\u1ec7c nh\u1eadn d\u1eef li\u1ec7u. Th\u1eddi gian gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u n\u00e0y l\u00e0 thay \u0111\u1ed5i \u0111\u01b0\u1ee3c v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd.<\/p>\n

          3. Ch\u1ebf \u0111\u1ed9 h\u1ed7n h\u1ee3p<\/h3>\n

          Nhi\u1ec1u h\u1ec7 th\u1ed1ng hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p. M\u1ed9t bus t\u1ed1c \u0111\u1ed9 cao c\u00f3 th\u1ec3 l\u00e0 b\u1ea5t \u0111\u1ed3ng b\u1ed9, trong khi logic n\u1ed9i b\u1ed9 v\u1eabn duy tr\u00ec \u0111\u1ed3ng b\u1ed9. S\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3i r\u00f5 r\u00e0ng ph\u00e2n bi\u1ec7t ph\u1ea7n n\u00e0o c\u1ee7a h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi \u0111\u1ed3ng h\u1ed3 v\u00e0 ph\u1ea7n n\u00e0o \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi c\u00e1c s\u1ef1 ki\u1ec7n b\u00ean ngo\u00e0i.<\/p>\n

          \ud83d\udd0d C\u00e1ch \u0111\u1ecdc v\u00e0 ph\u00e2n t\u00edch d\u1ea1ng s\u00f3ng<\/h2>\n

          Vi\u1ec7c di\u1ec5n gi\u1ea3i s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh c\u00f3 h\u1ec7 th\u1ed1ng. B\u1ea1n di chuy\u1ec3n t\u1eeb tr\u00e1i sang ph\u1ea3i, quan s\u00e1t c\u00e1ch m\u1ed7i t\u00edn hi\u1ec7u ph\u1ea3n \u1ee9ng v\u1edbi c\u00e1c t\u00edn hi\u1ec7u kh\u00e1c.<\/p>\n

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

          T\u00ecm t\u00edn hi\u1ec7u chu k\u1ef3 \u0111i\u1ec1u khi\u1ec3n h\u1ec7 th\u1ed1ng. \u0110\u00e2y l\u00e0 \u0111i\u1ec3m tham chi\u1ebfu c\u1ee7a b\u1ea1n. T\u1ea5t c\u1ea3 c\u00e1c ph\u00e9p \u0111o th\u1eddi gian kh\u00e1c \u0111\u1ec1u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u1ef1a tr\u00ean c\u00e1c c\u1ea1nh c\u1ee7a t\u00edn hi\u1ec7u n\u00e0y.<\/p>\n

          B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh c\u00e1c chuy\u1ec3n ti\u1ebfp d\u1eef li\u1ec7u<\/h3>\n

          T\u00ecm c\u00e1c \u0111\u01b0\u1eddng d\u1eef li\u1ec7u. Ghi ch\u00fa l\u1ea1i khi t\u00edn hi\u1ec7u thay \u0111\u1ed5i t\u1eeb cao xu\u1ed1ng th\u1ea5p ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i. Ki\u1ec3m tra xem s\u1ef1 thay \u0111\u1ed5i n\u00e0y c\u00f3 tr\u00f9ng v\u1edbi c\u1ea1nh \u0111\u1ed3ng h\u1ed3 hay kh\u00f4ng, ho\u1eb7c c\u00f3 ph\u1ea3i b\u1ea5t \u0111\u1ed3ng b\u1ed9 hay kh\u00f4ng.<\/p>\n

          B\u01b0\u1edbc 3: \u0110o \u0111\u1ed9 tr\u1ec5<\/h3>\n

          So s\u00e1nh t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o v\u1edbi t\u00edn hi\u1ec7u \u0111\u1ea7u ra. \u0110o kho\u1ea3ng c\u00e1ch ngang gi\u1eefa chuy\u1ec3n ti\u1ebfp \u0111\u1ea7u v\u00e0o v\u00e0 chuy\u1ec3n ti\u1ebfp \u0111\u1ea7u ra. \u0110\u00e2y ch\u00ednh l\u00e0 \u0111\u1ed9 tr\u1ec5 lan truy\u1ec1n. N\u1ebfu t\u1ed3n t\u1ea1i nhi\u1ec1u \u0111\u01b0\u1eddng d\u1eabn, h\u00e3y so s\u00e1nh ch\u00fang \u0111\u1ec3 t\u00ecm ra \u0111\u01b0\u1eddng d\u1eabn quan tr\u1ecdng nh\u1ea5t.<\/p>\n

          B\u01b0\u1edbc 4: Ki\u1ec3m tra c\u00e1c xung nhi\u1ec5u<\/h3>\n

          C\u00e1c xung nhi\u1ec5u l\u00e0 nh\u1eefng xung ng\u1eafn, kh\u00f4ng mong mu\u1ed1n. Trong s\u01a1 \u0111\u1ed3 th\u1eddi gian, ch\u00fang xu\u1ea5t hi\u1ec7n nh\u01b0 nh\u1eefng \u0111\u1ec9nh ng\u1eafn gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh. N\u1ebfu m\u1ed9t t\u00edn hi\u1ec7u t\u1ea1m th\u1eddi chuy\u1ec3n sang tr\u1ea1ng th\u00e1i sai tr\u01b0\u1edbc khi \u1ed5n \u0111\u1ecbnh, \u0111i\u1ec1u \u0111\u00f3 cho th\u1ea5y c\u00f3 \u0111i\u1ec1u ki\u1ec7n c\u1ea1nh tranh ho\u1eb7c nguy c\u01a1 logic. Nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y c\u00f3 th\u1ec3 g\u00e2y l\u1ed7i \u1edf c\u00e1c t\u1ea7ng ph\u00eda sau n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c l\u1ecdc.<\/p>\n

          \u26a0\ufe0f Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 vi ph\u1ea1m<\/h2>\n

          Ngay c\u1ea3 khi s\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng, l\u1ed7i v\u1eabn c\u00f3 th\u1ec3 x\u1ea3y ra trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai. Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c vi ph\u1ea1m ph\u1ed5 bi\u1ebfn s\u1ebd gi\u00fap vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n

          1. Vi ph\u1ea1m \u0111i\u1ec1u ki\u1ec7n thi\u1ebft l\u1eadp<\/h3>\n

          \u0110i\u1ec1u n\u00e0y x\u1ea3y ra khi d\u1eef li\u1ec7u \u0111\u1ebfn qu\u00e1 mu\u1ed9n \u0111\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ed3ng h\u1ed3 ghi nh\u1eadn. Chuy\u1ec3n ti\u1ebfp d\u1eef li\u1ec7u x\u1ea3y ra sau khi kho\u1ea3ng th\u1eddi gian thi\u1ebft l\u1eadp \u0111\u00e3 \u0111\u00f3ng l\u1ea1i. Trong s\u01a1 \u0111\u1ed3, c\u1ea1nh d\u1eef li\u1ec7u s\u1ebd qu\u00e1 g\u1ea7n c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u1edf ph\u00eda b\u00ean tr\u00e1i c\u1ee7a c\u1eeda s\u1ed5 ghi nh\u1eadn.<\/p>\n

          2. Vi ph\u1ea1m \u0111i\u1ec1u ki\u1ec7n gi\u1eef<\/h3>\n

          \u0110i\u1ec1u n\u00e0y x\u1ea3y ra khi d\u1eef li\u1ec7u thay \u0111\u1ed5i qu\u00e1 s\u1edbm sau c\u1ea1nh \u0111\u1ed3ng h\u1ed3. D\u1eef li\u1ec7u m\u1edbi ghi \u0111\u00e8 l\u00ean d\u1eef li\u1ec7u c\u0169 tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c ghi v\u00e0o. Trong s\u01a1 \u0111\u1ed3, c\u1ea1nh d\u1eef li\u1ec7u s\u1ebd qu\u00e1 g\u1ea7n c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u1edf ph\u00eda b\u00ean ph\u1ea3i c\u1ee7a c\u1eeda s\u1ed5 ghi nh\u1eadn.<\/p>\n

          3. T\u00ednh b\u1ea5t \u1ed5n<\/h3>\n

          \u0110\u00e2y l\u00e0 tr\u1ea1ng th\u00e1i m\u00e0 m\u1ed9t flip-flop kh\u00f4ng th\u1ec3 quy\u1ebft \u0111\u1ecbnh gi\u1eefa cao v\u00e0 th\u1ea5p. T\u00ecnh tr\u1ea1ng n\u00e0y x\u1ea3y ra khi vi ph\u1ea1m th\u1eddi gian thi\u1ebft l\u1eadp ho\u1eb7c th\u1eddi gian gi\u1eef. T\u00edn hi\u1ec7u s\u1ebd \u1edf m\u1ee9c \u0111i\u1ec7n \u00e1p trung gian trong m\u1ed9t kho\u1ea3ng th\u1eddi gian kh\u00f4ng th\u1ec3 d\u1ef1 \u0111o\u00e1n. Trong s\u01a1 \u0111\u1ed3 th\u1eddi gian, \u0111i\u1ec1u n\u00e0y tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t t\u00edn hi\u1ec7u kh\u00f4ng \u1ed5n \u0111\u1ecbnh nhanh ch\u00f3ng sau c\u1ea1nh \u0111\u1ed3ng h\u1ed3.<\/p>\n

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

          \u0110\u1ed9 l\u1ec7ch x\u1ea3y ra khi t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfn c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nhau v\u00e0o c\u00e1c th\u1eddi \u0111i\u1ec3m kh\u00e1c nhau. N\u1ebfu c\u1ea1nh \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfn thi\u1ebft b\u1ecb g\u1eedi tr\u01b0\u1edbc thi\u1ebft b\u1ecb nh\u1eadn, d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1eedi tr\u01b0\u1edbc khi thi\u1ebft b\u1ecb nh\u1eadn s\u1eb5n s\u00e0ng. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y th\u1ec3 hi\u1ec7n r\u00f5 qua s\u1ef1 d\u1ecbch chuy\u1ec3n c\u1ee7a \u0111\u01b0\u1eddng \u0111\u1ed3ng h\u1ed3 so v\u1edbi c\u00e1c \u0111\u01b0\u1eddng \u0111\u1ed3ng h\u1ed3 kh\u00e1c.<\/p>\n

          \ud83d\udee0\ufe0f C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho t\u00e0i li\u1ec7u<\/h2>\n

          Vi\u1ec7c t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian r\u00f5 r\u00e0ng \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c k\u1ef9 s\u01b0 kh\u00e1c c\u00f3 th\u1ec3 hi\u1ec3u thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n m\u00e0 kh\u00f4ng b\u1ecb hi\u1ec3u nh\u1ea7m.<\/p>\n

            \n
          • T\u1ef7 l\u1ec7 \u0111\u1ed3ng \u0111\u1ec1u:<\/strong>\u0110\u1ea3m b\u1ea3o thang th\u1eddi gian \u0111\u01b0\u1ee3c \u0111\u1ed3ng nh\u1ea5t tr\u00ean to\u00e0n b\u1ed9 s\u01a1 \u0111\u1ed3. Kh\u00f4ng ph\u00f3ng to m\u1ed9t ph\u1ea7n m\u00e0 kh\u00f4ng ghi ch\u00fa s\u1ef1 thay \u0111\u1ed5i.<\/li>\n
          • Ch\u00fa th\u00edch r\u00f5 r\u00e0ng:<\/strong>X\u00e1c \u0111\u1ecbnh t\u00ean t\u1eebng t\u00edn hi\u1ec7u v\u00e0 m\u1ee9c logic. Ghi ch\u00fa r\u00f5 t\u00edn hi\u1ec7u c\u00f3 m\u1ee9c ho\u1ea1t \u0111\u1ed9ng th\u1ea5p hay kh\u00f4ng.<\/li>\n
          • Ghi ch\u00fa c\u00e1c r\u00e0ng bu\u1ed9c:<\/strong>Ghi r\u00f5 th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 th\u1eddi gian gi\u1eef tr\u1ef1c ti\u1ebfp tr\u00ean s\u01a1 \u0111\u1ed3. Kh\u00f4ng n\u00ean d\u1ef1a v\u00e0o tr\u00ed nh\u1edb.<\/li>\n
          • Nh\u1ea5n m\u1ea1nh c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng:<\/strong>S\u1eed d\u1ee5ng c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eadm ho\u1eb7c m\u00e0u s\u1eafc kh\u00e1c nhau \u0111\u1ec3 l\u00e0m n\u1ed5i b\u1eadt \u0111\u01b0\u1eddng \u0111i quy\u1ebft \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n
          • S\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u ti\u00eau chu\u1ea9n:<\/strong>Tu\u00e2n theo c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh v\u1ec1 c\u00e1c c\u1ea1nh \u0111\u1ed3ng h\u1ed3 v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 hi\u1ec3u bi\u1ebft ph\u1ed5 bi\u1ebfn.<\/li>\n<\/ul>\n

            \ud83c\udf10 \u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf<\/h2>\n

            Bi\u1ec3u \u0111\u1ed3 th\u1eddi gian kh\u00f4ng b\u1ecb gi\u1edbi h\u1ea1n trong m\u1ed9t l\u0129nh v\u1ef1c. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p n\u01a1i \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u l\u00e0 quan tr\u1ecdng.<\/p>\n

            1. C\u00e1c giao th\u1ee9c truy\u1ec1n th\u00f4ng<\/h3>\n

            C\u00e1c giao th\u1ee9c nh\u01b0 I2C, SPI v\u00e0 UART ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o bi\u1ec3u \u0111\u1ed3 th\u1eddi gian. Nh\u1eefng bi\u1ec3u \u0111\u1ed3 n\u00e0y x\u00e1c \u0111\u1ecbnh bit b\u1eaft \u0111\u1ea7u, c\u00e1c bit d\u1eef li\u1ec7u v\u00e0 bit d\u1eebng. Ch\u00fang x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c m\u1ed7i bit ph\u1ea3i k\u00e9o d\u00e0i bao l\u00e2u v\u00e0 khi n\u00e0o t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 chuy\u1ec3n \u0111\u1ed5i so v\u1edbi d\u1eef li\u1ec7u. Kh\u00f4ng c\u00f3 \u0111i\u1ec1u n\u00e0y, hai thi\u1ebft b\u1ecb s\u1ebd kh\u00f4ng th\u1ec3 th\u1ed1ng nh\u1ea5t \u0111\u01b0\u1ee3c \u00fd ngh\u0129a c\u1ee7a m\u1ed9t \u201c1\u201d hay \u201c0\u201d.<\/p>\n

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

            B\u1ed9 \u0111i\u1ec1u khi\u1ec3n b\u1ed9 nh\u1edb ph\u1ea3i ph\u1ed1i h\u1ee3p ch\u00ednh x\u00e1c v\u1edbi c\u00e1c m\u00f4-\u0111un RAM. Bi\u1ec3u \u0111\u1ed3 th\u1eddi gian x\u00e1c \u0111\u1ecbnh kho\u1ea3ng th\u1eddi gian m\u00e0 d\u1eef li\u1ec7u l\u00e0 h\u1ee3p l\u1ec7 sau khi g\u1eedi l\u1ec7nh \u0111\u1ecdc. N\u1ebfu b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ecdc qu\u00e1 s\u1edbm ho\u1eb7c qu\u00e1 mu\u1ed9n, d\u1eef li\u1ec7u s\u1ebd b\u1ecb l\u1ed7i.<\/p>\n

            3. Qu\u1ea3n l\u00fd ngu\u1ed3n \u0111i\u1ec7n<\/h3>\n

            Th\u1ee9 t\u1ef1 c\u1ea5p ngu\u1ed3n trong c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang th\u01b0\u1eddng y\u00eau c\u1ea7u th\u1eddi gian ch\u00ednh x\u00e1c. M\u1ed9t vi \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 c\u1ea7n ngu\u1ed3n \u1ed5n \u0111\u1ecbnh tr\u01b0\u1edbc khi ph\u00e1t t\u00edn hi\u1ec7u kh\u1edfi \u0111\u1ed9ng l\u1ea1i. Bi\u1ec3u \u0111\u1ed3 th\u1eddi gian m\u00f4 t\u1ea3 c\u00e1c tr\u00ecnh t\u1ef1 kh\u1edfi \u0111\u1ed9ng ngu\u1ed3n n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng kh\u1edfi \u0111\u1ed9ng \u0111\u00fang c\u00e1ch.<\/p>\n

            4. \u0110i\u1ec7n t\u1eed \u00f4 t\u00f4<\/h3>\n

            Trong xe c\u1ed9, an to\u00e0n l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u. Bi\u1ec3u \u0111\u1ed3 th\u1eddi gian x\u00e1c minh r\u1eb1ng c\u00e1c c\u1ea3m bi\u1ebfn ph\u1ea3n \u1ee9ng trong gi\u1edbi h\u1ea1n th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh. N\u1ebfu t\u00edn hi\u1ec7u t\u1eeb c\u1ea3m bi\u1ebfn phanh m\u1ea5t qu\u00e1 nhi\u1ec1u th\u1eddi gian \u0111\u1ec3 \u0111\u1ebfn b\u1ed9 \u0111i\u1ec1u khi\u1ec3n, h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 kh\u00f4ng ph\u1ea3n \u1ee9ng k\u1ecbp th\u1eddi.<\/p>\n

            \ud83d\udcdd T\u1ea1o bi\u1ec3u \u0111\u1ed3 th\u1eddi gian c\u1ee7a ri\u00eang b\u1ea1n<\/h2>\n

            Khi b\u1ea1n c\u1ea7n ghi ch\u00e9p m\u1ed9t chu\u1ed7i s\u1ef1 ki\u1ec7n, h\u00e3y tu\u00e2n theo ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ec3 t\u1ea1o ra m\u1ed9t bi\u1ec3u \u0111\u1ed3 hi\u1ec7u qu\u1ea3.<\/p>\n

            1. X\u00e1c \u0111\u1ecbnh ph\u1ea1m vi<\/h3>\n

            B\u1ea1n \u0111ang c\u1ed1 g\u1eafng gi\u1ea3i th\u00edch \u0111i\u1ec1u g\u00ec? C\u00f3 ph\u1ea3i l\u00e0 m\u1ed9t chu k\u1ef3 \u0111\u1ed3ng h\u1ed3 duy nh\u1ea5t? M\u1ed9t chu\u1ed7i kh\u1edfi \u0111\u1ed9ng l\u1ea1i ho\u00e0n ch\u1ec9nh? X\u00e1c \u0111\u1ecbnh r\u00f5 \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac.<\/p>\n

            2. Li\u1ec7t k\u00ea c\u00e1c t\u00edn hi\u1ec7u<\/h3>\n

            Ghi l\u1ea1i m\u1ecdi t\u00edn hi\u1ec7u thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i trong chu\u1ed7i n\u00e0y. S\u1eafp x\u1ebfp ch\u00fang m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd, th\u01b0\u1eddng l\u00e0 nh\u00f3m c\u00e1c t\u00edn hi\u1ec7u li\u00ean quan l\u1ea1i v\u1edbi nhau.<\/p>\n

            3. X\u00e1c \u0111\u1ecbnh c\u01a1 s\u1edf th\u1eddi gian<\/h3>\n

            Quy\u1ebft \u0111\u1ecbnh \u0111\u01a1n v\u1ecb th\u1eddi gian. B\u1ea1n s\u1ebd d\u00f9ng chu k\u1ef3 \u0111\u1ed3ng h\u1ed3 hay nanosecond? \u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ea7n thi\u1ebft.<\/p>\n

            4. V\u1ebd c\u00e1c chuy\u1ec3n ti\u1ebfp<\/h3>\n

            V\u1ebd c\u00e1c \u0111\u01b0\u1eddng bi\u1ec3u di\u1ec5n c\u00e1c t\u00edn hi\u1ec7u. \u0110\u1ea3m b\u1ea3o c\u00e1c chuy\u1ec3n ti\u1ebfp tr\u00f9ng v\u1edbi c\u00e1c m\u1ed1c th\u1eddi gian \u0111\u00e3 x\u00e1c \u0111\u1ecbnh. D\u00f9ng \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng cho c\u00e1c thay \u0111\u1ed5i t\u1ee9c th\u00ec v\u00e0 \u0111\u01b0\u1eddng ch\u00e9o cho th\u1eddi gian t\u0103ng\/gi\u1ea3m.<\/p>\n

            5. Ki\u1ec3m tra t\u00ednh nh\u1ea5t qu\u00e1n<\/h3>\n

            Ki\u1ec3m tra xem logic c\u00f3 h\u1ee3p l\u00fd hay kh\u00f4ng. N\u1ebfu m\u1ed9t t\u00edn hi\u1ec7u ph\u1ea3i \u1edf m\u1ee9c cao, h\u00e3y \u0111\u1ea3m b\u1ea3o n\u00f3 duy tr\u00ec \u1edf m\u1ee9c cao trong kho\u1ea3ng th\u1eddi gian y\u00eau c\u1ea7u. X\u00e1c minh r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c r\u00e0ng bu\u1ed9c thi\u1ebft l\u1eadp v\u00e0 gi\u1eef \u0111\u1ec1u \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng v\u1ec1 m\u1eb7t tr\u1ef1c quan.<\/p>\n

            \ud83d\udcca So s\u00e1nh c\u00e1c y\u1ebfu t\u1ed1 bi\u1ec3u \u0111\u1ed3<\/h2>\n

            \u0110\u1ec3 t\u00f3m t\u1eaft c\u00e1c y\u1ebfu t\u1ed1 tr\u1ef1c quan \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c bi\u1ec3u \u0111\u1ed3 n\u00e0y, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch \u00fd ngh\u0129a c\u1ee7a t\u1eebng ki\u1ec3u \u0111\u01b0\u1eddng v\u00e0 k\u00fd hi\u1ec7u.<\/p>\n\n\n\n\n\n\n\n\n
            Y\u1ebfu t\u1ed1 tr\u1ef1c quan<\/th>\n\u00dd ngh\u0129a<\/th>\nV\u00ed d\u1ee5 s\u1eed d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
            \u0110\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng<\/td>\nChuy\u1ec3n ti\u1ebfp t\u1ee9c th\u00ec<\/td>\nThay \u0111\u1ed5i \u0111\u1ea7u ra c\u1ed5ng logic<\/td>\n<\/tr>\n
            \u0110\u01b0\u1eddng xi\u00ean<\/td>\n\u0110\u1ed9 tr\u1ec5 lan truy\u1ec1n<\/td>\nTh\u1eddi gian t\u0103ng ho\u1eb7c gi\u1ea3m tr\u00ean d\u00e2y d\u1eabn<\/td>\n<\/tr>\n
            \u0110\u01b0\u1eddng n\u00e9t \u0111\u1ee9t<\/td>\nCh\u1ec9 ra tr\u1ea1ng th\u00e1i ti\u1ec1m n\u0103ng<\/td>\nV\u00f9ng b\u1ea5t \u1ed5n \u0111\u1ecbnh<\/td>\n<\/tr>\n
            V\u00f9ng \u0111\u01b0\u1ee3c t\u00f4 \u0111\u1eadm<\/td>\nV\u00f9ng kh\u00f4ng h\u1ee3p l\u1ec7<\/td>\nV\u00f9ng vi ph\u1ea1m \u0111i\u1ec1u ki\u1ec7n thi\u1ebft l\u1eadp\/gi\u1eef<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            Hi\u1ec3u \u0111\u01b0\u1ee3c nh\u1eefng d\u1ea5u hi\u1ec7u tr\u1ef1c quan n\u00e0y gi\u00fap b\u1ea1n nhanh ch\u00f3ng ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n. M\u1ed9t v\u00f9ng \u0111\u01b0\u1ee3c t\u00f4 \u0111\u1eadm trong s\u01a1 \u0111\u1ed3 ngay l\u1eadp t\u1ee9c c\u1ea3nh b\u00e1o v\u1ec1 m\u1ed9t v\u1ea5n \u0111\u1ec1. M\u1ed9t \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t cho th\u1ea5y s\u1ef1 kh\u00f4ng ch\u1eafc ch\u1eafn. C\u00e1ch vi\u1ebft t\u1eaft tr\u1ef1c quan n\u00e0y r\u1ea5t m\u1ea1nh m\u1ebd trong giao ti\u1ebfp.<\/p>\n

            \ud83e\udde0 T\u00ecm hi\u1ec3u s\u00e2u v\u1ec1 tr\u1ea1ng th\u00e1i b\u1ea5t \u1ed5n<\/h2>\n

            Tr\u1ea1ng th\u00e1i b\u1ea5t \u1ed5n l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng th\u01b0\u1eddng l\u00e0m ng\u01b0\u1eddi m\u1edbi b\u1ed1i r\u1ed1i. N\u00f3 x\u1ea3y ra khi m\u1ed9t flip-flop nh\u1eadn d\u1eef li\u1ec7u vi ph\u1ea1m y\u00eau c\u1ea7u th\u1eddi gian thi\u1ebft l\u1eadp ho\u1eb7c th\u1eddi gian gi\u1eef. Thay v\u00ec \u1ed5n \u0111\u1ecbnh v\u1ec1 0 ho\u1eb7c 1 x\u00e1c \u0111\u1ecbnh, \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra s\u1ebd l\u01a1 l\u1eedng \u1edf kho\u1ea3ng gi\u1eefa.<\/p>\n

            T\u1ea1i sao \u0111i\u1ec1u n\u00e0y x\u1ea3y ra? C\u00e1c transistor n\u1ed9i b\u1ed9 trong flip-flop \u0111ang \u1edf tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng. Kh\u00f4ng tr\u1ea1ng th\u00e1i n\u00e0o \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 bu\u1ed9c tr\u1ea1ng th\u00e1i kia. Tr\u1ea1ng th\u00e1i n\u00e0y c\u00f3 th\u1ec3 k\u00e9o d\u00e0i trong th\u1eddi gian d\u00e0i, c\u00f3 th\u1ec3 l\u00e2u h\u01a1n m\u1ed9t chu k\u1ef3 \u0111\u1ed3ng h\u1ed3.<\/p>\n

            Trong s\u01a1 \u0111\u1ed3 th\u1eddi gian, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y m\u1ed9t t\u00edn hi\u1ec7u kh\u00f4ng \u1ed5n \u0111\u1ecbnh ngay l\u1eadp t\u1ee9c sau c\u1ea1nh \u0111\u1ed3ng h\u1ed3. \u0110\u00e2y l\u00e0 m\u1ed9t c\u1ea3nh b\u00e1o \u0111\u1ecf. \u0110\u1ec3 gi\u1ea3m thi\u1ec3u \u0111i\u1ec1u n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf th\u01b0\u1eddng s\u1eed d\u1ee5ng b\u1ed9 \u0111\u1ed3ng b\u1ed9 h\u00f3a. B\u1ed9 \u0111\u1ed3ng b\u1ed9 h\u00f3a l\u00e0 m\u1ed9t chu\u1ed7i c\u00e1c flip-flop gi\u00fap t\u00edn hi\u1ec7u c\u00f3 th\u00eam th\u1eddi gian \u1ed5n \u0111\u1ecbnh tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng. S\u01a1 \u0111\u1ed3 th\u1eddi gian c\u1ea7n th\u1ec3 hi\u1ec7n r\u00f5 v\u00f9ng b\u1ea5t \u1ed5n \u0111\u1ec3 hi\u1ec3u r\u00f5 r\u1ee7i ro.<\/p>\n

            \ud83d\udd17 K\u1ebft n\u1ed1i th\u1eddi gian v\u1edbi logic<\/h2>\n

            Quan tr\u1ecdng l\u00e0 ph\u1ea3i nh\u1edb r\u1eb1ng s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa logic tr\u1eebu t\u01b0\u1ee3ng v\u00e0 th\u1ef1c t\u1ebf v\u1eadt l\u00fd. M\u1ed9t c\u1ed5ng logic c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u00fang l\u00fd thuy\u1ebft, nh\u01b0ng n\u1ebfu th\u1eddi gian sai, m\u1ea1ch v\u1eadt l\u00fd s\u1ebd th\u1ea5t b\u1ea1i. S\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u1ea1i di\u1ec7n cho c\u00e1c gi\u1edbi h\u1ea1n v\u1eadt l\u00fd c\u1ee7a c\u00e1c electron di chuy\u1ec3n qua d\u00e2y d\u1eabn v\u00e0 transistor.<\/p>\n

            V\u00ed d\u1ee5, m\u1ed9t d\u00e2y d\u1eabn c\u00f3 \u0111i\u1ec7n dung. Vi\u1ec7c n\u1ea1p \u0111i\u1ec7n dung n\u00e0y m\u1ea5t th\u1eddi gian. Gi\u1edbi h\u1ea1n v\u1eadt l\u00fd n\u00e0y t\u1ea1o ra \u0111\u1ed9 tr\u1ec5 \u0111\u01b0\u1ee3c th\u1ea5y trong s\u01a1 \u0111\u1ed3. N\u1ebfu b\u1ea1n c\u1ed1 g\u1eafng \u0111\u1ed3ng h\u1ed3 h\u00f3a h\u1ec7 th\u1ed1ng nhanh h\u01a1n t\u1ed1c \u0111\u1ed9 d\u00e2y d\u1eabn c\u00f3 th\u1ec3 n\u1ea1p, s\u01a1 \u0111\u1ed3 s\u1ebd hi\u1ec3n th\u1ecb vi ph\u1ea1m. Do \u0111\u00f3, s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 b\u1ea3n \u0111\u1ed3 c\u1ee7a th\u1ebf gi\u1edbi v\u1eadt l\u00fd, kh\u00f4ng ch\u1ec9 l\u00e0 b\u1ea3n \u0111\u1ed3 logic.<\/p>\n

            \ud83d\ude80 Ti\u1ebfn b\u01b0\u1edbc v\u1ec1 ph\u00eda tr\u01b0\u1edbc<\/h2>\n

            Khi h\u1ec7 th\u1ed1ng tr\u1edf n\u00ean nhanh h\u01a1n v\u00e0 ph\u1ee9c t\u1ea1p h\u01a1n, t\u1ea7m quan tr\u1ecdng c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian ng\u00e0y c\u00e0ng t\u0103ng. C\u00e1c chip hi\u1ec7n \u0111\u1ea1i ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 gigahertz, n\u01a1i m\u00e0 nanosecond l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng. \u0110\u1ed9 ch\u00ednh x\u00e1c l\u00e0 ch\u00eca kh\u00f3a. B\u1eb1ng c\u00e1ch th\u00e0nh th\u1ea1o kh\u1ea3 n\u0103ng \u0111\u1ecdc v\u00e0 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y, b\u1ea1n s\u1ebd hi\u1ec3u s\u00e2u s\u1eafc h\u01a1n v\u1ec1 c\u00e1ch c\u00e1c h\u1ec7 th\u1ed1ng s\u1ed1 th\u1ef1c s\u1ef1 ho\u1ea1t \u0111\u1ed9ng.<\/p>\n

            B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch c\u00e1c s\u01a1 \u0111\u1ed3 hi\u1ec7n c\u00f3 trong t\u00e0i li\u1ec7u. T\u00ecm c\u00e1c c\u1ea1nh \u0111\u1ed3ng h\u1ed3. \u0110o \u0111\u1ed9 tr\u1ec5. Ki\u1ec3m tra c\u00e1c c\u1eeda th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 gi\u1eef. Luy\u1ec7n t\u1eadp vi\u1ec7c di\u1ec5n gi\u1ea3i m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u. Theo th\u1eddi gian, nh\u1eefng m\u1eabu n\u00e0y s\u1ebd tr\u1edf n\u00ean tr\u1ef1c gi\u00e1c. B\u1ea1n s\u1ebd b\u1eaft \u0111\u1ea7u nh\u00ecn th\u1ea5y lu\u1ed3ng d\u1eef li\u1ec7u kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t chu\u1ed7i bit, m\u00e0 l\u00e0 m\u1ed9t nh\u1ecbp \u0111i\u1ec7u c\u1ee7a c\u00e1c s\u1ef1 ki\u1ec7n ph\u1ea3i \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p ho\u00e0n h\u1ea3o.<\/p>\n

            H\u00e3y nh\u1edb r\u1eb1ng s\u1ef1 r\u00f5 r\u00e0ng l\u00e0 m\u1ee5c ti\u00eau. M\u1ed9t s\u01a1 \u0111\u1ed3 kh\u00f3 \u0111\u1ecdc l\u00e0 th\u1ea5t b\u1ea1i trong giao ti\u1ebfp. S\u1eed d\u1ee5ng ch\u00fa th\u00edch, nh\u00e3n r\u00f5 r\u00e0ng v\u00e0 t\u1ef7 l\u1ec7 nh\u1ea5t qu\u00e1n. Xem s\u01a1 \u0111\u1ed3 nh\u01b0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng gi\u1eefa nh\u00e0 thi\u1ebft k\u1ebf v\u00e0 ng\u01b0\u1eddi tri\u1ec3n khai. N\u1ebfu th\u1eddi gian \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng, h\u1ec7 th\u1ed1ng s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 mong \u0111\u1ee3i. N\u1ebfu n\u00f3 m\u01a1 h\u1ed3, h\u1ec7 th\u1ed1ng s\u1ebd th\u1ea5t b\u1ea1i.<\/p>\n

            V\u1edbi n\u1ec1n t\u1ea3ng n\u00e0y, b\u1ea1n \u0111\u00e3 s\u1eb5n s\u00e0ng \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng th\u00e1ch th\u1ee9c \u0111\u1ed3ng b\u1ed9 h\u00f3a ph\u1ee9c t\u1ea1p h\u01a1n. D\u00f9 l\u00e0 x\u1eed l\u00fd c\u00e1c \u0111\u1ed3ng h\u1ed3 b\u1ea5t \u0111\u1ed3ng b\u1ed9 hay qu\u1ea3n l\u00fd c\u00e1c li\u00ean k\u1ebft n\u1ed1i serial t\u1ed1c \u0111\u1ed9 cao, c\u00e1c nguy\u00ean t\u1eafc v\u1eabn nh\u01b0 nhau. Th\u1eddi gian l\u00e0 t\u00e0i nguy\u00ean b\u1ea1n \u0111ang qu\u1ea3n l\u00fd. H\u00e3y tr\u00e2n tr\u1ecdng n\u00f3, \u0111o l\u01b0\u1eddng n\u00f3 v\u00e0 tr\u1ef1c quan h\u00f3a n\u00f3 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1ch c\u00e1c h\u1ec7 th\u1ed1ng s\u1ed1 ho\u1ea1t \u0111\u1ed9ng \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c bi\u1ebft c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0o \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i; b\u1ea1n ph\u1ea3i hi\u1ec3ukhic\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00f3 t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau. S\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u00f3ng vai tr\u00f2 nh\u01b0 ng\u00f4n ng\u1eef tr\u1ef1c quan cho ph\u00e2n t\u00edch theo th\u1eddi gian n\u00e0y. Ch\u00fang m\u00f4 t\u1ea3 tr\u00ecnh […]<\/p>\n","protected":false},"author":1,"featured_media":1569,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[13],"tags":[44,47],"class_list":["post-1568","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: H\u01b0\u1edbng d\u1eabn cho ng\u01b0\u1eddi m\u1edbi v\u1ec1 c\u00e1c chu\u1ed7i s\u1ef1 ki\u1ec7n<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch \u0111\u1ecdc v\u00e0 t\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ec3 tr\u1ef1c quan h\u00f3a c\u00e1c chu\u1ed7i s\u1ef1 ki\u1ec7n. 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