{"id":1570,"date":"2026-04-08T01:11:47","date_gmt":"2026-04-07T17:11:47","guid":{"rendered":"https:\/\/mayaharper.showcasingme.net\/vn\/timing-diagram-components-guide\/"},"modified":"2026-04-08T01:11:47","modified_gmt":"2026-04-07T17:11:47","slug":"timing-diagram-components-guide","status":"publish","type":"post","link":"https:\/\/mayaharper.showcasingme.net\/vn\/timing-diagram-components-guide\/","title":{"rendered":"Ph\u00e2n t\u00edch th\u00e0nh ph\u1ea7n: M\u1ecdi kh\u1ed1i x\u00e2y d\u1ef1ng b\u1ea1n c\u1ea7n trong m\u1ed9t s\u01a1 \u0111\u1ed3 th\u1eddi gian"},"content":{"rendered":"<p>S\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t bi\u1ec3u \u0111\u1ed3 tr\u1ef1c quan; n\u00f3 l\u00e0 b\u1ea3n v\u1ebd ph\u00e1c h\u1ecda \u0111\u1ec3 hi\u1ec3u c\u00e1ch c\u00e1c t\u00edn hi\u1ec7u s\u1ed1 t\u01b0\u01a1ng t\u00e1c qua m\u1ed9t kho\u1ea3ng th\u1eddi gian. D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng, g\u1ee1 l\u1ed7i ph\u1ea7n m\u1ec1m hay ph\u00e2n t\u00edch c\u00e1c giao th\u1ee9c truy\u1ec1n d\u1eef li\u1ec7u, kh\u1ea3 n\u0103ng di\u1ec5n gi\u1ea3i ch\u00ednh x\u00e1c c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0 \u0111i\u1ec1u n\u1ec1n t\u1ea3ng. H\u01b0\u1edbng d\u1eabn n\u00e0y ph\u00e2n t\u00edch t\u1eebng th\u00e0nh ph\u1ea7n li\u00ean quan \u0111\u1ebfn vi\u1ec7c x\u00e2y d\u1ef1ng v\u00e0 \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian, \u0111\u1ea3m b\u1ea3o b\u1ea1n c\u00f3 t\u1eeb v\u1ef1ng k\u1ef9 thu\u1eadt v\u00e0 ki\u1ebfn th\u1ee9c c\u1ea5u tr\u00fac c\u1ea7n thi\u1ebft \u0111\u1ec3 ph\u00e2n t\u00edch ch\u00ednh x\u00e1c.<\/p>\n<p>C\u00e1c t\u00edn hi\u1ec7u kh\u00f4ng t\u1ed3n t\u1ea1i m\u1ed9t c\u00e1ch c\u00f4 l\u1eadp. Ch\u00fang t\u01b0\u01a1ng t\u00e1c v\u1edbi \u0111\u1ed3ng h\u1ed3, \u0111\u01b0\u1eddng d\u1eef li\u1ec7u v\u00e0 c\u00e1c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n trong m\u1ed9t \u0111i\u1ec7u nh\u1ea3y nh\u1ecbp nh\u00e0ng. Vi\u1ec7c hi\u1ec3u sai m\u1ed9t c\u1ea1nh t\u00edn hi\u1ec7u hay m\u1ed9t gi\u00e1 tr\u1ecb tr\u1ec5 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 h\u1ec7 th\u1ed1ng. B\u00e0i vi\u1ebft n\u00e0y kh\u00e1m ph\u00e1 chi ti\u1ebft c\u1ea5u t\u1ea1o c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian, t\u1eeb c\u00e1c tr\u1ea1ng th\u00e1i t\u00edn hi\u1ec7u c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c r\u00e0ng bu\u1ed9c th\u1eddi gian ph\u1ee9c t\u1ea1p.<\/p>\n<figure class=\"wp-block-image aligncenter\"><img alt=\"Whimsical educational infographic illustrating the essential components of digital timing diagrams: time axis, signal lines, logic levels (High\/Low\/Hi-Z), rising\/falling edges, clock mechanisms, setup\/hold time windows, and standard symbols, presented with playful characters and colorful hand-drawn visuals for intuitive learning.\" decoding=\"async\" src=\"https:\/\/mayaharper.showcasingme.net\/wp-content\/uploads\/2026\/04\/whimsical-timing-diagram-components-infographic.jpg\"\/><\/figure>\n<h2>1. N\u1ec1n t\u1ea3ng: C\u00e1c tr\u1ee5c v\u00e0 thang \u0111o th\u1eddi gian \u23f1\ufe0f<\/h2>\n<p>M\u1ed7i s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ec1u b\u1eaft \u0111\u1ea7u b\u1eb1ng m\u1ed9t h\u1ec7 t\u1ecda \u0111\u1ed9. Kh\u00f4ng c\u00f3 thang \u0111o th\u1eddi gian x\u00e1c \u0111\u1ecbnh, s\u01a1 \u0111\u1ed3 ch\u1ec9 l\u00e0 m\u1ed9t b\u1ea3n ph\u00e1c h\u1ecda \u0111\u1ecbnh t\u00ednh ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00f4ng c\u1ee5 \u0111\u1ecbnh l\u01b0\u1ee3ng.<\/p>\n<ul>\n<li><strong>Tr\u1ee5c ngang (Th\u1eddi gian):<\/strong>\u0110i\u1ec1u n\u00e0y \u0111\u1ea1i di\u1ec7n cho s\u1ef1 ti\u1ebfn tri\u1ec3n c\u1ee7a th\u1eddi gian. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n t\u1eeb tr\u00e1i sang ph\u1ea3i. \u0110\u01a1n v\u1ecb c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y theo ng\u1eef c\u1ea3nh, bao g\u1ed3m gi\u00e2y, mili gi\u00e2y, vi gi\u00e2y, nano gi\u00e2y ho\u1eb7c chu k\u1ef3 \u0111\u1ed3ng h\u1ed3.<\/li>\n<li><strong>Tr\u1ee5c d\u1ecdc (M\u1ee9c t\u00edn hi\u1ec7u):<\/strong>\u0110i\u1ec1u n\u00e0y \u0111\u1ea1i di\u1ec7n cho tr\u1ea1ng th\u00e1i c\u1ee7a t\u00edn hi\u1ec7u. Th\u01b0\u1eddng l\u00e0 nh\u1ecb ph\u00e2n, hi\u1ec3n th\u1ecb Cao (1) ho\u1eb7c Th\u1ea5p (0), nh\u01b0ng c\u0169ng c\u00f3 th\u1ec3 bao g\u1ed3m c\u00e1c m\u1ee9c \u0111i\u1ec7n \u00e1p t\u01b0\u01a1ng t\u1ef1 ho\u1eb7c c\u00e1c gi\u00e1 tr\u1ecb logic \u0111a tr\u1ea1ng th\u00e1i.<\/li>\n<\/ul>\n<p>Khi thi\u1ebft l\u1eadp tr\u1ee5c ngang, t\u00ednh nh\u1ea5t qu\u00e1n l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t. N\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng thang \u0111o 10 nano gi\u00e2y cho m\u1ed7i \u0111\u01b0\u1eddng k\u1ebb l\u01b0\u1edbi, t\u1ea5t c\u1ea3 c\u00e1c t\u00edn hi\u1ec7u \u0111\u1ec1u ph\u1ea3i tu\u00e2n theo thang \u0111o n\u00e0y. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p \u0111o ch\u00ednh x\u00e1c c\u00e1c kho\u1ea3ng tr\u1ec5 v\u00e0 chu k\u1ef3 gi\u1eefa c\u00e1c s\u1ef1 ki\u1ec7n.<\/p>\n<h2>2. C\u00e1c \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u v\u00e0 nh\u1eadn di\u1ec7n \ud83d\udd0c<\/h2>\n<p>M\u1ed7i \u0111\u01b0\u1eddng ngang trong s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ea1i di\u1ec7n cho m\u1ed9t t\u00edn hi\u1ec7u c\u1ee5 th\u1ec3. Nh\u1eefng \u0111\u01b0\u1eddng n\u00e0y l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n ch\u00ednh truy\u1ec1n t\u1ea3i th\u00f4ng tin trong h\u1ec7 th\u1ed1ng.<\/p>\n<h3>Quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean t\u00edn hi\u1ec7u<\/h3>\n<ul>\n<li><strong>T\u00ean m\u00f4 t\u1ea3:<\/strong>S\u1eed d\u1ee5ng t\u00ean m\u00f4 t\u1ea3 ch\u1ee9c n\u0103ng, v\u00ed d\u1ee5 nh\u01b0<em>B\u1ed9 bus \u0111\u1ecba ch\u1ec9<\/em>, <em>D\u1eef li\u1ec7u h\u1ee3p l\u1ec7<\/em>, ho\u1eb7c<em>K\u00edch ho\u1ea1t \u0111\u1ed3ng h\u1ed3<\/em>.<\/li>\n<li><strong>Bi\u1ec3u t\u01b0\u1ee3ng t\u00edn hi\u1ec7u ho\u1ea1t \u0111\u1ed9ng th\u1ea5p:<\/strong>C\u00e1c t\u00edn hi\u1ec7u ho\u1ea1t \u0111\u1ed9ng khi \u1edf m\u1ee9c th\u1ea5p th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u b\u1eb1ng m\u1ed9t g\u1ea1ch ngang tr\u00ean t\u00ean (v\u00ed d\u1ee5 nh\u01b0<em>Ch\u1ecdn chip<\/em> ho\u1eb7c<em>nCS<\/em>), ho\u1eb7c b\u1eb1ng k\u00fd hi\u1ec7u t\u00edn hi\u1ec7u ho\u1ea1t \u0111\u1ed9ng th\u1ea5p.<\/li>\n<li><strong>Nh\u00f3m bus:<\/strong>Nhi\u1ec1u t\u00edn hi\u1ec7u \u0111\u1ea1i di\u1ec7n cho m\u1ed9t bus (nh\u01b0 Data 0-7) th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u00f3m l\u1ea1i v\u1edbi nhau b\u1eb1ng d\u1ea5u ngo\u1eb7c ho\u1eb7c d\u1ea5u g\u1ea1ch ch\u00e9o \u0111\u1ec3 ch\u1ec9 \u0111\u1ed9 r\u1ed9ng.<\/li>\n<\/ul>\n<h3>D\u1ea5u v\u1ebft t\u00edn hi\u1ec7u<\/h3>\n<p>D\u1ea5u v\u1ebft l\u00e0 \u0111\u01b0\u1eddng n\u1ed1i c\u00e1c \u0111i\u1ec3m tr\u00ean \u0111\u1ed3 th\u1ecb. H\u00ecnh d\u1ea1ng c\u1ee7a d\u1ea5u v\u1ebft cho th\u1ea5y h\u00e0nh vi c\u1ee7a t\u00edn hi\u1ec7u.<\/p>\n<ul>\n<li><strong>\u0110\u01b0\u1eddng th\u1eb3ng kh\u00f4ng \u0111\u1ed5i:<\/strong>M\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng n\u1eb1m ngang cho th\u1ea5y tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh. N\u1ebfu n\u00f3 duy tr\u00ec \u1edf m\u1ee9c cao, t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn v\u0129nh vi\u1ec5n. N\u1ebfu n\u00f3 duy tr\u00ec \u1edf m\u1ee9c th\u1ea5p, t\u00edn hi\u1ec7u b\u1ecb b\u1ecf x\u00e1c nh\u1eadn.<\/li>\n<li><strong>\u0110\u01b0\u1eddng b\u01b0\u1edbc:<\/strong>C\u00e1c chuy\u1ec3n ti\u1ebfp th\u1eb3ng \u0111\u1ee9ng gi\u1eefa c\u00e1c m\u1ee9c \u0111\u1ea1i di\u1ec7n cho s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i. Ch\u00fang n\u00ean \u0111\u01b0\u1ee3c v\u1ebd b\u1eb1ng c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng \u0111\u1ec3 ng\u1ee5 \u00fd s\u1ef1 chuy\u1ec3n \u0111\u1ed5i t\u1ee9c th\u00ec trong m\u00f4 h\u00ecnh l\u00fd t\u01b0\u1edfng, m\u1eb7c d\u00f9 v\u1eadt l\u00fd th\u1ef1c t\u1ebf t\u1ea1o ra th\u1eddi gian chuy\u1ec3n ti\u1ebfp.<\/li>\n<li><strong>\u0110\u01b0\u1eddng ch\u00e9o zigzag:<\/strong>Ch\u00fang th\u01b0\u1eddng \u0111\u1ea1i di\u1ec7n cho nhi\u1ec5u, l\u1ed7i xung, ho\u1eb7c dao \u0111\u1ed9ng t\u1ea7n s\u1ed1 cao c\u00f3 th\u1ec3 x\u1ea3y ra trong c\u00e1c chuy\u1ec3n ti\u1ebfp kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n<h2>3. Tr\u1ea1ng th\u00e1i t\u00edn hi\u1ec7u v\u00e0 m\u1ee9c logic \ud83d\udfe2\ud83d\udd34<\/h2>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c m\u1ee9c logic \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n tr\u00ean tr\u1ee5c \u0111\u1ee9ng l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 di\u1ec5n gi\u1ea3i ch\u00ednh x\u00e1c.<\/p>\n<h3>Tr\u1ea1ng th\u00e1i nh\u1ecb ph\u00e2n<\/h3>\n<ul>\n<li><strong>M\u1ee9c logic cao (1):<\/strong>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng v\u1ecb tr\u00ed tr\u00ean c\u00f9ng tr\u00ean tr\u1ee5c \u0111\u1ee9ng. Trong logic TTL, th\u01b0\u1eddng l\u00e0 5V. Trong CMOS, g\u1ea7n b\u1eb1ng \u0111i\u1ec7n \u00e1p ngu\u1ed3n.<\/li>\n<li><strong>M\u1ee9c logic th\u1ea5p (0):<\/strong>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng v\u1ecb tr\u00ed d\u01b0\u1edbi c\u00f9ng tr\u00ean tr\u1ee5c \u0111\u1ee9ng. Th\u01b0\u1eddng l\u00e0 0V ho\u1eb7c mass (\u0111\u1ea5t).<\/li>\n<\/ul>\n<h3>Tr\u1ea1ng th\u00e1i \u0111\u1eb7c bi\u1ec7t<\/h3>\n<ul>\n<li><strong>Tr\u1edf kh\u00e1ng cao (Z):<\/strong>C\u0169ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Hi-Z. Tr\u1ea1ng th\u00e1i n\u00e0y ng\u1eaft t\u00edn hi\u1ec7u kh\u1ecfi b\u1ed9 ph\u00e1t, cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c tr\u00ean bus \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1eddng d\u00e2y. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t ho\u1eb7c nh\u00e3n \u0111\u1eb7c bi\u1ec7t \u201cZ\u201d.<\/li>\n<li><strong>Kh\u00f4ng quan t\u00e2m (X):<\/strong>Ch\u1ec9 ra r\u1eb1ng gi\u00e1 tr\u1ecb c\u1ee7a t\u00edn hi\u1ec7u kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3 c\u1ee7a thao t\u00e1c. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng k\u00fd hi\u1ec7u \u201cX\u201d.<\/li>\n<li><strong>Kh\u00f4ng bi\u1ebft (U):<\/strong>D\u00f9ng khi tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u ch\u01b0a x\u00e1c \u0111\u1ecbnh t\u1ea1i th\u1eddi \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u m\u00f4 ph\u1ecfng.<\/li>\n<\/ul>\n<h2>4. Chuy\u1ec3n ti\u1ebfp v\u00e0 c\u1ea1nh \ud83d\udcc9\ud83d\udcc8<\/h2>\n<p>Chuy\u1ec3n ti\u1ebfp l\u00e0 nh\u1eefng kho\u1ea3nh kh\u1eafc t\u00edn hi\u1ec7u thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i. \u0110\u00e2y l\u00e0 ph\u1ea7n quan tr\u1ecdng nh\u1ea5t trong s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ec3 \u0111\u1ed3ng b\u1ed9 v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u.<\/p>\n<h3>C\u1ea1nh t\u0103ng<\/h3>\n<p>C\u1ea1nh t\u0103ng x\u1ea3y ra khi t\u00edn hi\u1ec7u chuy\u1ec3n t\u1eeb th\u1ea5p sang cao. Trong logic s\u1ed1, \u0111\u00e2y th\u01b0\u1eddng l\u00e0 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t cho c\u00e1c flip-flop \u0111\u01b0\u1ee3c k\u00edch b\u1eb1ng c\u1ea1nh t\u0103ng. N\u00f3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n tr\u1ef1c quan b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng \u0111i l\u00ean.<\/p>\n<h3>C\u1ea1nh gi\u1ea3m<\/h3>\n<p>C\u1ea1nh gi\u1ea3m x\u1ea3y ra khi t\u00edn hi\u1ec7u chuy\u1ec3n t\u1eeb cao sang th\u1ea5p. C\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u00edch b\u1eb1ng c\u1ea1nh gi\u1ea3m s\u1ebd ph\u1ea3n \u1ee9ng v\u1edbi chuy\u1ec3n ti\u1ebfp n\u00e0y. N\u00f3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n tr\u1ef1c quan b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng \u0111i xu\u1ed1ng.<\/p>\n<h3>Th\u1eddi gian chuy\u1ec3n ti\u1ebfp<\/h3>\n<p>Trong khi s\u01a1 \u0111\u1ed3 l\u00fd t\u01b0\u1edfng th\u1ec3 hi\u1ec7n c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng t\u1ee9c th\u00ec, t\u00edn hi\u1ec7u th\u1ef1c t\u1ebf c\u00f3 th\u1eddi gian chuy\u1ec3n ti\u1ebfp h\u1eefu h\u1ea1n. \u0110\u00e2y l\u00e0 kho\u1ea3ng th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111i\u1ec7n \u00e1p di chuy\u1ec3n t\u1eeb ng\u01b0\u1ee1ng logic n\u00e0y sang ng\u01b0\u1ee1ng logic kh\u00e1c. Trong c\u00e1c thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao, th\u1eddi gian n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec n\u00f3 x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng b\u0103ng th\u00f4ng m\u00e0 t\u00edn hi\u1ec7u ti\u00eau th\u1ee5.<\/p>\n<h2>5. C\u01a1 ch\u1ebf \u0111\u1ed3ng b\u1ed9 \u2699\ufe0f<\/h2>\n<p>\u0110\u1ed3ng h\u1ed3 \u0111\u1ed3ng b\u1ed9 h\u00f3a c\u00e1c thao t\u00e1c. Kh\u00f4ng c\u00f3 \u0111\u1ed3ng h\u1ed3, c\u00e1c h\u1ec7 th\u1ed1ng b\u1ea5t \u0111\u1ed3ng b\u1ed9 ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c t\u00edn hi\u1ec7u x\u00e1c nh\u1eadn, nh\u01b0ng ph\u1ea7n l\u1edbn c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nh\u1ecbp \u0111\u1ed9 x\u1eed l\u00fd d\u1eef li\u1ec7u.<\/p>\n<h3>Chu k\u1ef3 \u0111\u1ed3ng h\u1ed3 v\u00e0 t\u1ea7n s\u1ed1<\/h3>\n<ul>\n<li><strong>Chu k\u1ef3 (T):<\/strong> Th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 ho\u00e0n th\u00e0nh m\u1ed9t chu k\u1ef3 ho\u00e0n ch\u1ec9nh c\u1ee7a t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 (t\u1eeb c\u1ea1nh t\u0103ng \u0111\u1ebfn c\u1ea1nh t\u0103ng ti\u1ebfp theo).<\/li>\n<li><strong>T\u1ea7n s\u1ed1 (f):<\/strong> S\u1ed1 chu k\u1ef3 m\u1ed7i gi\u00e2y, \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng Hertz (Hz). T\u1ea7n s\u1ed1 l\u00e0 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a chu k\u1ef3 (f = 1\/T).<\/li>\n<\/ul>\n<h3>Chu k\u1ef3 l\u00e0m vi\u1ec7c<\/h3>\n<p>Chu k\u1ef3 l\u00e0m vi\u1ec7c l\u00e0 ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t chu k\u1ef3 m\u00e0 t\u00edn hi\u1ec7u \u1edf m\u1ee9c cao. Chu k\u1ef3 l\u00e0m vi\u1ec7c 50% c\u00f3 ngh\u0129a l\u00e0 t\u00edn hi\u1ec7u \u1edf m\u1ee9c cao trong n\u1eeda chu k\u1ef3 v\u00e0 m\u1ee9c th\u1ea5p trong n\u1eeda c\u00f2n l\u1ea1i. Nh\u1eefng l\u1ec7ch kh\u1ecfi 50% c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian c\u1ee7a c\u00e1c c\u1ed5ng logic c\u1ee5 th\u1ec3.<\/p>\n<h3>\u0110\u1ed3ng b\u1ed9 pha<\/h3>\n<p>Trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111a \u0111\u1ed3ng h\u1ed3, m\u1ed1i quan h\u1ec7 pha gi\u1eefa c\u00e1c \u0111\u1ed3ng h\u1ed3 l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng. Hai \u0111\u1ed3ng h\u1ed3 c\u00f3 th\u1ec3 ch\u1ea1y v\u1edbi c\u00f9ng t\u1ea7n s\u1ed1 nh\u01b0ng b\u1eaft \u0111\u1ea7u t\u1ea1i c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau trong chu k\u1ef3 c\u1ee7a ch\u00fang. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 nhi\u1ec1u mi\u1ec1n \u0111\u1ed3ng h\u1ed3.<\/p>\n<h2>6. Gi\u1edbi h\u1ea1n th\u1eddi gian v\u00e0 \u0111\u1ed9 tr\u1ec5 \u23f3<\/h2>\n<p>C\u00e1c gi\u1edbi h\u1ea1n th\u1eddi gian x\u00e1c \u0111\u1ecbnh kho\u1ea3ng th\u1eddi gian ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ec3 t\u00edn hi\u1ec7u thay \u0111\u1ed5i. Vi ph\u1ea1m c\u00e1c gi\u1edbi h\u1ea1n n\u00e0y d\u1eabn \u0111\u1ebfn l\u1ed7i ch\u1ee9c n\u0103ng.<\/p>\n<h3>Th\u1eddi gian thi\u1ebft l\u1eadp<\/h3>\n<p>Th\u1eddi gian thi\u1ebft l\u1eadp l\u00e0 kho\u1ea3ng th\u1eddi gian t\u1ed1i thi\u1ec3u tr\u01b0\u1edbc c\u1ea1nh \u0111\u1ed3ng h\u1ed3 m\u00e0 t\u00edn hi\u1ec7u 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, thi\u1ebft b\u1ecb nh\u1eadn c\u00f3 th\u1ec3 kh\u00f4ng thu \u0111\u01b0\u1ee3c n\u00f3 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n<ul>\n<li><strong>Y\u00eau c\u1ea7u:<\/strong>D\u1eef li\u1ec7u ph\u1ea3i \u1ed5n \u0111\u1ecbnh trong X nanosecond tr\u01b0\u1edbc c\u1ea1nh t\u0103ng.<\/li>\n<li><strong>H\u1eadu qu\u1ea3 khi vi ph\u1ea1m:<\/strong>T\u00ecnh tr\u1ea1ng b\u1ea5t \u1ed5n ho\u1eb7c thu d\u1eef li\u1ec7u sai.<\/li>\n<\/ul>\n<h3>Th\u1eddi gian gi\u1eef<\/h3>\n<p>Th\u1eddi gian gi\u1eef l\u00e0 kho\u1ea3ng th\u1eddi gian t\u1ed1i thi\u1ec3u sau c\u1ea1nh \u0111\u1ed3ng h\u1ed3 m\u00e0 t\u00edn hi\u1ec7u d\u1eef li\u1ec7u ph\u1ea3i duy tr\u00ec \u1ed5n \u0111\u1ecbnh. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c ghi nh\u1edb m\u1ed9t c\u00e1ch an to\u00e0n.<\/p>\n<ul>\n<li><strong>Y\u00eau c\u1ea7u:<\/strong>D\u1eef li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c thay \u0111\u1ed5i trong Y nanosecond sau c\u1ea1nh t\u0103ng.<\/li>\n<li><strong>H\u1eadu qu\u1ea3 khi vi ph\u1ea1m:<\/strong>L\u1ed7i d\u1eef li\u1ec7u ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n c\u1ea1nh tranh.<\/li>\n<\/ul>\n<h3>\u0110\u1ed9 tr\u1ec5 lan truy\u1ec1n<\/h3>\n<p>\u0110\u00e2y l\u00e0 kho\u1ea3ng th\u1eddi gian \u0111\u1ec3 t\u00edn hi\u1ec7u \u0111i t\u1eeb \u0111\u1ea7u v\u00e0o c\u1ee7a m\u1ed9t th\u00e0nh ph\u1ea7n \u0111\u1ebfn \u0111\u1ea7u ra c\u1ee7a n\u00f3. Kho\u1ea3ng th\u1eddi gian n\u00e0y thay \u0111\u1ed5i t\u00f9y theo \u0111\u01b0\u1eddng \u0111i v\u1eadt l\u00fd v\u00e0 lo\u1ea1i c\u1ed5ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n<h3>Sai l\u1ec7ch pha<\/h3>\n<p>Sai l\u1ec7ch x\u1ea3y ra khi c\u00f9ng m\u1ed9t 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. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra do s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn tr\u00ean bo m\u1ea1ch. Sai l\u1ec7ch l\u00e0m gi\u1ea3m kho\u1ea3ng th\u1eddi gian hi\u1ec7u qu\u1ea3 cho thi\u1ebft l\u1eadp v\u00e0 gi\u1eef.<\/p>\n<h2>7. M\u00e3 h\u00f3a d\u1eef li\u1ec7u v\u00e0 t\u00ednh h\u1ee3p l\u1ec7 \ud83d\udcdd<\/h2>\n<p>S\u01a1 \u0111\u1ed3 th\u1eddi gian th\u01b0\u1eddng cho th\u1ea5y khi n\u00e0o d\u1eef li\u1ec7u h\u1ee3p l\u1ec7 so v\u1edbi t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 ho\u1eb7c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n.<\/p>\n<h3>Kho\u1ea3ng th\u1eddi gian d\u1eef li\u1ec7u h\u1ee3p l\u1ec7<\/h3>\n<p>C\u00f3 m\u1ed9t kho\u1ea3ng th\u1eddi gian c\u1ee5 th\u1ec3 m\u00e0 d\u1eef li\u1ec7u tr\u00ean bus \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o l\u00e0 ch\u00ednh x\u00e1c. Th\u01b0\u1eddng l\u00e0 kho\u1ea3ng th\u1eddi gian gi\u1eefa c\u1ea1nh xung nh\u1ecbp v\u00e0 c\u1ea1nh ti\u1ebfp theo, ho\u1eb7c gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t.<\/p>\n<h3>C\u00e1c ph\u01b0\u01a1ng th\u1ee9c m\u00e3 h\u00f3a<\/h3>\n<ul>\n<li><strong>NRZ (Kh\u00f4ng tr\u1edf v\u1ec1 kh\u00f4ng):<\/strong>D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1edfi m\u1ee9c t\u00edn hi\u1ec7u. \u0110\u01a1n gi\u1ea3n nh\u01b0ng thi\u1ebfu t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 b\u00ean trong lu\u1ed3ng d\u1eef li\u1ec7u.<\/li>\n<li><strong>M\u00e3 h\u00f3a Manchester:<\/strong>M\u1ed7i bit \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t chuy\u1ec3n \u0111\u1ed5i \u1edf gi\u1eefa kho\u1ea3ng th\u1eddi gian bit. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o vi\u1ec7c kh\u00f4i ph\u1ee5c \u0111\u1ed3ng h\u1ed3 l\u00e0 kh\u1ea3 thi.<\/li>\n<li><strong>4B\/5B:<\/strong>M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u00e3 kh\u1ed1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ee7 c\u00e1c chuy\u1ec3n \u0111\u1ed5i cho vi\u1ec7c kh\u00f4i ph\u1ee5c \u0111\u1ed3ng h\u1ed3 trong khi v\u1eabn duy tr\u00ec hi\u1ec7u qu\u1ea3.<\/li>\n<\/ul>\n<h2>8. C\u00e1c lo\u1ea1i s\u01a1 \u0111\u1ed3 th\u1eddi gian \ud83d\udcd1<\/h2>\n<p>C\u00e1c b\u1ed1i c\u1ea3nh kh\u00e1c nhau y\u00eau c\u1ea7u c\u00e1c phong c\u00e1ch s\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00e1c nhau.<\/p>\n<h3>S\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ed3ng b\u1ed9<\/h3>\n<p>Ch\u00fang ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o m\u1ed9t \u0111\u1ed3ng h\u1ed3 ch\u00ednh. T\u1ea5t c\u1ea3 c\u00e1c s\u1ef1 ki\u1ec7n \u0111\u1ec1u \u0111\u01b0\u1ee3c tham chi\u1ebfu \u0111\u1ebfn c\u00e1c c\u1ea1nh xung nh\u1ecbp. \u0110i\u1ec1u n\u00e0y gi\u00fap ph\u00e2n t\u00edch d\u1ec5 d\u00e0ng h\u01a1n v\u00ec th\u1eddi gian l\u00e0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n v\u00e0 chu k\u1ef3.<\/p>\n<h3>S\u01a1 \u0111\u1ed3 th\u1eddi gian b\u1ea5t \u0111\u1ed3ng b\u1ed9<\/h3>\n<p>Ch\u00fang kh\u00f4ng ph\u1ee5 thu\u1ed9c 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 s\u1ef1 ki\u1ec7n tr\u01b0\u1edbc \u0111\u00f3 (th\u1ecfa thu\u1eadn tay). Kho\u1ea3ng th\u1eddi gian gi\u1eefa c\u00e1c s\u1ef1 ki\u1ec7n l\u00e0 thay \u0111\u1ed5i v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd ho\u1eb7c \u0111\u1ed9 tr\u1ec5 m\u1ea1ng.<\/p>\n<h3>S\u01a1 \u0111\u1ed3 th\u1eddi gian giao th\u1ee9c<\/h3>\n<p>Ch\u00fang t\u1eadp trung v\u00e0o c\u00e1c quy t\u1eafc giao ti\u1ebfp gi\u1eefa hai thi\u1ebft b\u1ecb, ch\u1eb3ng h\u1ea1n nh\u01b0 I2C, SPI ho\u1eb7c UART. Ch\u00fang x\u00e1c \u0111\u1ecbnh c\u00e1c bit b\u1eaft \u0111\u1ea7u, bit k\u1ebft th\u00fac, bit d\u1eef li\u1ec7u v\u00e0 t\u00edn hi\u1ec7u x\u00e1c nh\u1eadn.<\/p>\n<h2>9. T\u00f3m t\u1eaft c\u00e1c k\u00fd hi\u1ec7u ph\u1ed5 bi\u1ebfn \ud83d\udccb<\/h2>\n<p>B\u1ea3ng sau t\u00f3m t\u1eaft c\u00e1c k\u00fd hi\u1ec7u chu\u1ea9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u01a1 \u0111\u1ed3 th\u1eddi gian nh\u1eb1m c\u1ea3i thi\u1ec7n \u0111\u1ed9 d\u1ec5 \u0111\u1ecdc v\u00e0 t\u00ednh nh\u1ea5t qu\u00e1n.<\/p>\n<table>\n<thead>\n<tr>\n<th>K\u00fd hi\u1ec7u<\/th>\n<th>\u00dd ngh\u0129a<\/th>\n<th>B\u1ed1i c\u1ea3nh s\u1eed d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u2197<\/td>\n<td>C\u1ea1nh l\u00ean<\/td>\n<td>Logic k\u00edch ho\u1ea1t b\u1edfi c\u1ea1nh d\u01b0\u01a1ng<\/td>\n<\/tr>\n<tr>\n<td>\u2198<\/td>\n<td>C\u1ea1nh xu\u1ed1ng<\/td>\n<td>Logic k\u00edch ho\u1ea1t b\u1edfi c\u1ea1nh \u00e2m<\/td>\n<\/tr>\n<tr>\n<td>___<\/td>\n<td>M\u1ee9c logic th\u1ea5p (0)<\/td>\n<td>Tr\u1ea1ng th\u00e1i n\u1ed1i \u0111\u1ea5t ho\u1eb7c kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td>___<\/td>\n<td>M\u1ee9c logic cao (1)<\/td>\n<td>VCC ho\u1eb7c tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td>~<\/td>\n<td>Ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c th\u1ea5p<\/td>\n<td>T\u00edn hi\u1ec7u ho\u1ea1t \u0111\u1ed9ng khi \u1edf m\u1ee9c th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td>X<\/td>\n<td>Kh\u00f4ng quan t\u00e2m<\/td>\n<td>Gi\u00e1 tr\u1ecb kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn logic<\/td>\n<\/tr>\n<tr>\n<td>Z<\/td>\n<td>Tr\u1edf kh\u00e1ng cao<\/td>\n<td>Bus hai chi\u1ec1u \u1edf tr\u1ea1ng th\u00e1i tr\u00f4i<\/td>\n<\/tr>\n<tr>\n<td>\u21e8<\/td>\n<td>Th\u1eddi gian tr\u1ec5 lan truy\u1ec1n<\/td>\n<td>Th\u1eddi gian gi\u1eefa thay \u0111\u1ed5i \u0111\u1ea7u v\u00e0o v\u00e0 thay \u0111\u1ed5i \u0111\u1ea7u ra<\/td>\n<\/tr>\n<tr>\n<td>\u23f0<\/td>\n<td>C\u1ea1nh \u0111\u1ed3ng h\u1ed3<\/td>\n<td>\u0110i\u1ec3m \u0111\u1ed3ng b\u1ed9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>10. C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho t\u00e0i li\u1ec7u \ud83d\udcdd<\/h2>\n<p>Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian m\u00e0 ng\u01b0\u1eddi kh\u00e1c c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u00f2i h\u1ecfi tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n. T\u00e0i li\u1ec7u k\u00e9m d\u1eabn \u0111\u1ebfn sai s\u00f3t k\u1ef9 thu\u1eadt.<\/p>\n<ul>\n<li><strong>T\u1ef7 l\u1ec7 nh\u1ea5t qu\u00e1n:<\/strong> \u0110\u1ea3m b\u1ea3o thang th\u1eddi gian l\u00e0 tuy\u1ebfn t\u00ednh. Kh\u00f4ng n\u00e9n th\u1eddi gian \u1edf m\u1ed9t ph\u1ea7n v\u00e0 gi\u00e3n ra \u1edf ph\u1ea7n kh\u00e1c m\u00e0 kh\u00f4ng c\u00f3 ch\u1ec9 d\u1eabn r\u00f5 r\u00e0ng.<\/li>\n<li><strong>Ghi ch\u00fa r\u00f5 r\u00e0ng:<\/strong> Th\u00eam ghi ch\u00fa v\u0103n b\u1ea3n \u0111\u1ec3 gi\u1ea3i th\u00edch c\u00e1c t\u01b0\u01a1ng t\u00e1c ph\u1ee9c t\u1ea1p. M\u1ed9t s\u01a1 \u0111\u1ed3 c\u00f3 th\u1ec3 tr\u1edf n\u00ean r\u1ed1i r\u1eafm n\u1ebfu ch\u1ec9 d\u1ef1a v\u00e0o c\u00e1c \u0111\u01b0\u1eddng n\u00e9t.<\/li>\n<li><strong>Nh\u00f3m c\u00e1c t\u00edn hi\u1ec7u li\u00ean quan:<\/strong> \u0110\u1eb7t c\u00e1c t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u00e1c ch\u1eb7t ch\u1ebd v\u1edbi nhau theo chi\u1ec1u d\u1ecdc. \u0110i\u1ec1u n\u00e0y gi\u1ea3m thi\u1ec3u kho\u1ea3ng c\u00e1ch di chuy\u1ec3n m\u1eaft c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec3u m\u1ed1i quan h\u1ec7.<\/li>\n<li><strong>Ghi ch\u00fa c\u00e1c \u0111i\u1ec3m quan tr\u1ecdng:<\/strong> Nh\u1ea5n m\u1ea1nh r\u00f5 r\u00e0ng th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 th\u1eddi gian gi\u1eef. S\u1eed d\u1ee5ng d\u1ea5u ngo\u1eb7c ho\u1eb7c v\u00f9ng t\u00f4 m\u00e0u \u0111\u1ec3 ch\u1ec9 ra c\u00e1c kho\u1ea3ng th\u1eddi gian h\u1ee3p l\u1ec7.<\/li>\n<li><strong>Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n:<\/strong> N\u1ebfu thi\u1ebft k\u1ebf thay \u0111\u1ed5i, h\u00e3y c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 ngay l\u1eadp t\u1ee9c. Nh\u1eefng s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u1ed7i th\u1eddi c\u00f2n t\u1ec7 h\u01a1n c\u1ea3 kh\u00f4ng c\u00f3 s\u01a1 \u0111\u1ed3 n\u00e0o.<\/li>\n<\/ul>\n<h2>11. Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 hi\u1ec3u nh\u1ea7m \u26a0\ufe0f<\/h2>\n<p>Ngay c\u1ea3 nh\u1eefng k\u1ef9 s\u01b0 c\u00f3 kinh nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 hi\u1ec3u sai s\u01a1 \u0111\u1ed3 th\u1eddi gian. Nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn s\u1ebd gi\u00fap qu\u00e1 tr\u00ecnh ki\u1ec3m ch\u1ee9ng hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<h3>Chuy\u1ec3n ti\u1ebfp m\u01a1 h\u1ed3<\/h3>\n<p>M\u1ed9t s\u1ed1 s\u01a1 \u0111\u1ed3 v\u1ebd c\u00e1c chuy\u1ec3n ti\u1ebfp kh\u00f4ng th\u1eb3ng \u0111\u1ee9ng. N\u1ebfu m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng nghi\u00eang, \u0111i\u1ec1u \u0111\u00f3 ng\u1ee5 \u00fd th\u1eddi gian chuy\u1ec3n ti\u1ebfp. N\u1ebfu \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng, \u0111i\u1ec1u \u0111\u00f3 ng\u1ee5 \u00fd thay \u0111\u1ed5i t\u1ee9c th\u00ec. H\u00e3y r\u00f5 r\u00e0ng v\u1ec1 m\u00f4 h\u00ecnh b\u1ea1n \u0111ang s\u1eed d\u1ee5ng.<\/p>\n<h3>Thi\u1ebfu b\u1ed1i c\u1ea3nh<\/h3>\n<p>M\u1ed9t s\u01a1 \u0111\u1ed3 th\u1ec3 hi\u1ec7n t\u00edn hi\u1ec7u chuy\u1ec3n l\u00ean cao s\u1ebd v\u00f4 d\u1ee5ng n\u1ebfu kh\u00f4ng bi\u1ebft t\u00edn hi\u1ec7u n\u00e0o k\u00edch ho\u1ea1t n\u00f3. Lu\u00f4n lu\u00f4n bao g\u1ed3m c\u00e1c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n g\u00e2y ra s\u1ef1 thay \u0111\u1ed5i c\u1ee7a t\u00edn hi\u1ec7u d\u1eef li\u1ec7u.<\/p>\n<h3>S\u1ef1 nh\u1ea7m l\u1eabn v\u1ec1 thang \u0111o<\/h3>\n<p>M\u1ed9t sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 gi\u1ea3 \u0111\u1ecbnh c\u00f9ng m\u1ed9t thang \u0111o cho nhi\u1ec1u s\u01a1 \u0111\u1ed3. N\u1ebfu S\u01a1 \u0111\u1ed3 A d\u00f9ng micro gi\u00e2y v\u00e0 S\u01a1 \u0111\u1ed3 B d\u00f9ng chu k\u1ef3 \u0111\u1ed3ng h\u1ed3, \u0111\u1eebng so s\u00e1nh ch\u00fang tr\u1ef1c ti\u1ebfp m\u00e0 kh\u00f4ng chuy\u1ec3n \u0111\u1ed5i.<\/p>\n<h3>B\u1ecf qua c\u00e1c xung nhi\u1ec5u<\/h3>\n<p>Nh\u1eefng xung ng\u1eafn (xung nhi\u1ec5u) th\u01b0\u1eddng b\u1ecb b\u1ecf qua \u0111\u1ec3 r\u00f5 r\u00e0ng h\u01a1n. Tuy nhi\u00ean, trong c\u00e1c m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao, nh\u1eefng xung nhi\u1ec5u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra tr\u1ea1ng th\u00e1i sai. Lu\u00f4n ghi ch\u00fa r\u00f5 li\u1ec7u c\u00e1c xung nhi\u1ec5u c\u00f3 \u0111\u01b0\u1ee3c l\u1ecdc hay b\u1ecf qua hay kh\u00f4ng.<\/p>\n<h2>12. \u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf trong vi\u1ec7c g\u1ee1 l\u1ed7i \ud83d\udd0d<\/h2>\n<p>S\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 c\u00f4ng c\u1ee5 ch\u00ednh \u0111\u1ec3 g\u1ee1 l\u1ed7i c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1ed3ng b\u1ed9 h\u00f3a. Khi h\u1ec7 th\u1ed1ng th\u1ea5t b\u1ea1i, s\u01a1 \u0111\u1ed3 gi\u00fap x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c n\u01a1i vi ph\u1ea1m r\u00e0ng bu\u1ed9c th\u1eddi gian.<\/p>\n<h3>G\u1ee1 l\u1ed7i t\u1eebng b\u01b0\u1edbc<\/h3>\n<ol>\n<li><strong>X\u00e1c \u0111\u1ecbnh \u0111\u1ed3ng h\u1ed3:<\/strong> X\u00e1c \u0111\u1ecbnh \u0111\u1ed3ng h\u1ed3 tham chi\u1ebfu cho h\u1ec7 th\u1ed1ng con \u0111ang l\u1ed7i.<\/li>\n<li><strong>Ki\u1ec3m tra \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh d\u1eef li\u1ec7u:<\/strong> X\u00e1c minh r\u1eb1ng c\u00e1c \u0111\u01b0\u1eddng d\u1eef li\u1ec7u \u1ed5n \u0111\u1ecbnh trong kho\u1ea3ng th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 gi\u1eef t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u1ea1nh \u0111\u1ed3ng h\u1ed3.<\/li>\n<li><strong>\u0110o \u0111\u1ed9 tr\u1ec5:<\/strong> D\u00f9ng dao \u0111\u1ed9ng k\u00fd \u0111\u1ec3 \u0111o \u0111\u1ed9 tr\u1ec5 lan truy\u1ec1n th\u1ef1c t\u1ebf v\u00e0 so s\u00e1nh v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 trong s\u01a1 \u0111\u1ed3.<\/li>\n<li><strong>Ph\u00e2n t\u00edch \u0111\u1ed9 l\u1ec7ch:<\/strong> Ki\u1ec3m tra xem t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 c\u00f3 \u0111\u1ebfn c\u00e1c chip kh\u00e1c nhau v\u00e0o c\u00e1c th\u1eddi \u0111i\u1ec3m kh\u00e1c nhau hay kh\u00f4ng.<\/li>\n<li><strong>Xem x\u00e9t l\u1ea1i c\u00e1c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n:<\/strong> \u0110\u1ea3m b\u1ea3o c\u00e1c t\u00edn hi\u1ec7u b\u1eadt \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t \u0111\u00fang c\u00e1ch tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u truy\u1ec1n d\u1eef li\u1ec7u.<\/li>\n<\/ol>\n<h2>13. Nh\u1eefng c\u00e2n nh\u1eafc trong t\u01b0\u01a1ng lai \u0111\u1ed1i v\u1edbi thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao \ud83d\ude80<\/h2>\n<p>Khi c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n, y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi s\u01a1 \u0111\u1ed3 th\u1eddi gian tr\u1edf n\u00ean kh\u1eaft khe h\u01a1n.<\/p>\n<ul>\n<li><strong>Rung \u0111\u1ed9ng (Jitter):<\/strong> \u1ede t\u1ea7n s\u1ed1 r\u1ea5t cao, ch\u00ednh c\u1ea1nh \u0111\u1ed3ng h\u1ed3 c\u00f3 th\u1ec3 dao \u0111\u1ed9ng. S\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3i t\u00ednh \u0111\u1ebfn gi\u1edbi h\u1ea1n rung \u0111\u1ed9ng.<\/li>\n<li><strong>Qu\u1ea3n l\u00fd n\u0103ng l\u01b0\u1ee3ng:<\/strong> Thang \u0111o \u0111i\u1ec7n \u00e1p v\u00e0 t\u1ea7n s\u1ed1 \u0111\u1ed9ng (DVFS) c\u00f3 th\u1ec3 thay \u0111\u1ed5i c\u00e1c tham s\u1ed1 th\u1eddi gian m\u1ed9t c\u00e1ch t\u1ee9c th\u00ec. S\u01a1 \u0111\u1ed3 ph\u1ea3i ph\u1ea3n \u00e1nh c\u00e1c ch\u1ebf \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng \u0111a mi\u1ec1n:<\/strong>C\u00e1c vi m\u1ea1ch hi\u1ec7n \u0111\u1ea1i t\u00edch h\u1ee3p c\u00e1c ph\u1ea7n t\u01b0\u01a1ng t\u1ef1, s\u1ed1 v\u00e0 RF. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3i th\u1ec3 hi\u1ec7n c\u00e1ch c\u00e1c mi\u1ec1n n\u00e0y giao ti\u1ebfp v\u1edbi nhau.<\/li>\n<\/ul>\n<h2>14. T\u00edch h\u1ee3p v\u1edbi c\u00e1c t\u00e0i li\u1ec7u kh\u00e1c \ud83d\udcda<\/h2>\n<p>M\u1ed9t s\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp. N\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t khi \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u1edbi c\u00e1c t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt kh\u00e1c.<\/p>\n<ul>\n<li><strong>S\u01a1 \u0111\u1ed3 m\u1ea1ch:<\/strong>Hi\u1ec3n th\u1ecb c\u00e1c k\u1ebft n\u1ed1i v\u1eadt l\u00fd t\u1ea1o n\u00ean c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n th\u1eddi gian.<\/li>\n<li><strong>M\u00e1y tr\u1ea1ng th\u00e1i:<\/strong>Hi\u1ec3n th\u1ecb lu\u1ed3ng logic \u0111i\u1ec1u khi\u1ec3n c\u00e1c t\u00edn hi\u1ec7u th\u1eddi gian.<\/li>\n<li><strong>B\u1ea3n \u0111\u1ed3 thanh ghi:<\/strong>Hi\u1ec3n th\u1ecb c\u1ea5u h\u00ecnh quy\u1ebft \u0111\u1ecbnh h\u00e0nh vi th\u1eddi gian.<\/li>\n<\/ul>\n<h2>15. Nh\u1eefng suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u \ud83d\udee1\ufe0f<\/h2>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u. N\u00f3 t\u1ea1o n\u00ean c\u1ea7u n\u1ed1i gi\u1eefa logic tr\u1eebu t\u01b0\u1ee3ng v\u00e0 th\u1ef1c t\u1ebf v\u1eadt l\u00fd. B\u1eb1ng c\u00e1ch n\u1eafm v\u1eefng c\u00e1c y\u1ebfu t\u1ed1 v\u1ec1 th\u1eddi gian, tr\u1ea1ng th\u00e1i v\u00e0 c\u1ea1nh, c\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng b\u1ec1n v\u1eefng v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>\n<p>H\u00e3y nh\u1edb r\u1eb1ng s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng gi\u1eefa ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m. N\u00f3 x\u00e1c \u0111\u1ecbnh c\u00e1c quy t\u1eafc tham gia. N\u1ebfu ph\u1ea7n c\u1ee9ng kh\u00f4ng tu\u00e2n theo c\u00e1c quy t\u1eafc th\u1eddi gian, ph\u1ea7n m\u1ec1m s\u1ebd kh\u00f4ng th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang. Do \u0111\u00f3, \u0111\u1ed9 ch\u00ednh x\u00e1c trong c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn m\u00e0 l\u00e0 m\u1ed9t y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c.<\/p>\n<p>D\u00f9 b\u1ea1n \u0111ang ph\u00e2n t\u00edch m\u1ed9t t\u00edn hi\u1ec7u nh\u00e1y LED \u0111\u01a1n gi\u1ea3n hay m\u1ed9t lu\u1ed3ng d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p nhi\u1ec1u gigabit, c\u00e1c th\u00e0nh ph\u1ea7n v\u1eabn nh\u01b0 nhau. T\u1eadp trung v\u00e0o c\u00e1c c\u1ea1nh, t\u00f4n tr\u1ecdng \u0111\u1ed9 tr\u1ec5 v\u00e0 duy tr\u00ec s\u1ef1 r\u00f5 r\u00e0ng trong t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n r\u00f5 r\u00e0ng, c\u00f3 th\u1ec3 ki\u1ec3m ch\u1ee9ng v\u00e0 th\u00e0nh c\u00f4ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>S\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t bi\u1ec3u \u0111\u1ed3 tr\u1ef1c quan; n\u00f3 l\u00e0 b\u1ea3n v\u1ebd ph\u00e1c h\u1ecda \u0111\u1ec3 hi\u1ec3u c\u00e1ch c\u00e1c t\u00edn hi\u1ec7u s\u1ed1 t\u01b0\u01a1ng t\u00e1c qua m\u1ed9t kho\u1ea3ng th\u1eddi gian. D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng, g\u1ee1 l\u1ed7i ph\u1ea7n m\u1ec1m hay ph\u00e2n t\u00edch c\u00e1c giao th\u1ee9c truy\u1ec1n d\u1eef li\u1ec7u, kh\u1ea3 n\u0103ng di\u1ec5n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1571,"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-1570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-timing-diagram"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C\u00e1c th\u00e0nh ph\u1ea7n s\u01a1 \u0111\u1ed3 th\u1eddi gian: H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 ph\u00e2n t\u00edch t\u00edn hi\u1ec7u \u23f1\ufe0f<\/title>\n<meta name=\"description\" content=\"H\u1ecdc t\u1eebng th\u00e0nh ph\u1ea7n s\u01a1 \u0111\u1ed3 th\u1eddi gian, t\u1eeb tr\u1ea1ng th\u00e1i t\u00edn hi\u1ec7u \u0111\u1ebfn th\u1eddi gian chu\u1ea9n b\u1ecb. 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