{"id":1542,"date":"2026-04-10T11:57:37","date_gmt":"2026-04-10T03:57:37","guid":{"rendered":"https:\/\/mayaharper.showcasingme.net\/vn\/quick-start-guide-drawing-timing-diagram-firmware\/"},"modified":"2026-04-10T11:57:37","modified_gmt":"2026-04-10T03:57:37","slug":"quick-start-guide-drawing-timing-diagram-firmware","status":"publish","type":"post","link":"https:\/\/mayaharper.showcasingme.net\/vn\/quick-start-guide-drawing-timing-diagram-firmware\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn nhanh: V\u1ebd s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ea7u ti\u00ean c\u1ee7a b\u1ea1n cho c\u00e1c d\u1ef1 \u00e1n ph\u1ea7n m\u1ec1m nh\u00fang"},"content":{"rendered":"<p>Ph\u00e1t tri\u1ec3n nh\u00fang ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o vi\u1ec7c \u0111\u1ed3ng b\u1ed9 h\u00f3a gi\u1eefa c\u00e1c l\u1ec7nh ph\u1ea7n m\u1ec1m v\u00e0 c\u00e1c t\u00edn hi\u1ec7u v\u1eadt l\u00fd t\u1eeb ph\u1ea7n c\u1ee9ng. Khi ph\u1ea7n m\u1ec1m nh\u00fang t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u1ea3m bi\u1ebfn, m\u00e0n h\u00ecnh hay c\u00e1c bus giao ti\u1ebfp, \u0111\u1ed9 ch\u00ednh x\u00e1c l\u00e0 \u0111i\u1ec1u kh\u00f4ng th\u1ec3 th\u01b0\u01a1ng l\u01b0\u1ee3ng. S\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u00f3ng vai tr\u00f2 nh\u01b0 b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf cho s\u1ef1 t\u01b0\u01a1ng t\u00e1c n\u00e0y, tr\u1ef1c quan h\u00f3a c\u00e1ch c\u00e1c t\u00edn hi\u1ec7u thay \u0111\u1ed5i theo th\u1eddi gian. H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c c\u00f4ng c\u1ee5 \u0111\u1eb7c th\u00f9, t\u1eadp trung v\u00e0o nh\u1eefng nguy\u00ean l\u00fd c\u1ed1t l\u00f5i \u0111\u1ea3m b\u1ea3o ph\u1ea7n m\u1ec1m nh\u00fang c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c trong m\u00f4i tr\u01b0\u1eddng ph\u1ea7n c\u1ee9ng c\u1ee7a n\u00f3.<\/p>\n<p>D\u00f9 b\u1ea1n \u0111ang x\u1eed l\u00fd s\u1ef1 c\u1ed1 giao ti\u1ebfp I2C kh\u00f3 ch\u1ecbu hay \u0111ang \u0111\u1ecbnh ngh\u0129a m\u1ed9t giao di\u1ec7n m\u1edbi cho vi \u0111i\u1ec1u khi\u1ec3n, vi\u1ec7c hi\u1ec3u r\u00f5 m\u1ed1i quan h\u1ec7 theo th\u1eddi gian gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u l\u00e0 \u0111i\u1ec1u then ch\u1ed1t. T\u00e0i li\u1ec7u n\u00e0y ph\u00e2n t\u00edch c\u00e1c y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu, quy tr\u00ecnh t\u1ea1o d\u1ef1ng t\u1eebng b\u01b0\u1edbc v\u00e0 nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh. Sau khi \u0111\u1ecdc xong, b\u1ea1n s\u1ebd c\u00f3 n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc \u0111\u1ec3 ghi ch\u00e9p h\u00e0nh vi t\u00edn hi\u1ec7u, gi\u00fap c\u1ea7u n\u1ed1i kho\u1ea3ng c\u00e1ch gi\u1eefa logic m\u00e3 ngu\u1ed3n v\u00e0 th\u1ef1c t\u1ebf \u0111i\u1ec7n h\u1ecdc.<\/p>\n<figure class=\"wp-block-image aligncenter\"><img alt=\"Kawaii-style infographic guide for creating firmware timing diagrams: illustrates fundamentals (time axis, signal levels, logic states), anatomy of professional diagrams, 6-step creation process, popular protocols (UART, I2C, SPI, 1-Wire), critical timing parameters (setup time, hold time, propagation delay), firmware considerations, common pitfalls to avoid, and collaboration tips with hardware teams - all presented with cute pastel illustrations, smiling microcontroller characters, and playful icons for embedded developers\" decoding=\"async\" src=\"https:\/\/mayaharper.showcasingme.net\/wp-content\/uploads\/2026\/04\/kawaii-timing-diagram-firmware-guide-infographic-16x9-1.jpg\"\/><\/figure>\n<h2>Hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean l\u00fd c\u01a1 b\u1ea3n v\u1ec1 th\u1eddi gian t\u00edn hi\u1ec7u \ud83e\udde9<\/h2>\n<p>S\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 m\u1ed9t bi\u1ec3u di\u1ec5n \u0111\u1ed3 h\u1ecda v\u1ec1 c\u00e1ch c\u00e1c t\u00edn hi\u1ec7u \u0111i\u1ec7n thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i theo th\u1eddi gian. Trong b\u1ed1i c\u1ea3nh ph\u1ea7n m\u1ec1m nh\u00fang, c\u00e1c t\u00edn hi\u1ec7u n\u00e0y \u0111\u1ea1i di\u1ec7n cho c\u00e1c \u0111\u01b0\u1eddng d\u00e2y v\u1eadt l\u00fd k\u1ebft n\u1ed1i b\u1ed9 x\u1eed l\u00fd c\u1ee7a b\u1ea1n v\u1edbi c\u00e1c thi\u1ebft b\u1ecb ngo\u1ea1i vi. Tr\u1ee5c ho\u00e0nh \u0111\u1ea1i di\u1ec7n cho th\u1eddi gian, di chuy\u1ec3n t\u1eeb tr\u00e1i sang ph\u1ea3i. Tr\u1ee5c tung \u0111\u1ea1i di\u1ec7n cho m\u1ee9c logic ho\u1eb7c tr\u1ea1ng th\u00e1i \u0111i\u1ec7n \u00e1p c\u1ee7a t\u00edn hi\u1ec7u.<\/p>\n<ul>\n<li><strong>Tr\u1ee5c th\u1eddi gian:<\/strong> \u0110\u00e2y l\u00e0 tham chi\u1ebfu \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m c\u00e1c s\u1ef1 ki\u1ec7n x\u1ea3y ra. Trong ph\u1ea7n m\u1ec1m nh\u00fang, \u0111i\u1ec1u n\u00e0y th\u01b0\u1eddng t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c chu k\u1ef3 \u0111\u1ed3ng h\u1ed3, c\u00e1c chu k\u1ef3 l\u1ec7nh ho\u1eb7c th\u1eddi gian tuy\u1ec7t \u0111\u1ed1i t\u00ednh b\u1eb1ng mili gi\u00e2y.<\/li>\n<li><strong>Tr\u1ee5c t\u00edn hi\u1ec7u:<\/strong> M\u1ed7i \u0111\u01b0\u1eddng ngang \u0111\u1ea1i di\u1ec7n cho m\u1ed9t d\u00e2y d\u1eabn ho\u1eb7c m\u1ea1ng c\u1ee5 th\u1ec3. C\u00e1c nh\u00e3n ph\u1ea3i x\u00e1c \u0111\u1ecbnh r\u00f5 ch\u1ee9c n\u0103ng, v\u00ed d\u1ee5 nh\u01b0 &#8220;<code>CLK<\/code>, <code>DATA<\/code>, ho\u1eb7c &#8220;<code>CS<\/code> (Ch\u1ecdn chip).<\/li>\n<li><strong>M\u1ee9c logic:<\/strong> C\u00e1c t\u00edn hi\u1ec7u th\u01b0\u1eddng l\u00e0 nh\u1ecb ph\u00e2n. \u0110i\u1ec7n \u00e1p cao (v\u00ed d\u1ee5: 3,3V) \u0111\u1ea1i di\u1ec7n cho logic 1, v\u00e0 \u0111i\u1ec7n \u00e1p th\u1ea5p (v\u00ed d\u1ee5: 0V) \u0111\u1ea1i di\u1ec7n cho logic 0. M\u1ed9t s\u1ed1 giao th\u1ee9c s\u1eed d\u1ee5ng tr\u1ea1ng th\u00e1i High-Z (tr\u1edf kh\u00e1ng cao) khi ch\u00e2n \u0111\u01b0\u1ee3c ng\u1eaft k\u1ebft n\u1ed1i \u0111i\u1ec7n.<\/li>\n<\/ul>\n<p>\u0110\u1ed9 ch\u00ednh x\u00e1c trong c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1ed9t c\u1ea1nh kh\u00f4ng \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh \u0111\u00fang trong s\u01a1 \u0111\u1ed3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n ph\u1ea7n m\u1ec1m ghi d\u1eef li\u1ec7u v\u00e0o th\u1eddi \u0111i\u1ec3m sai, g\u00e2y ra l\u1ed7i d\u1eef li\u1ec7u ho\u1eb7c treo ph\u1ea7n c\u1ee9ng. S\u01a1 \u0111\u1ed3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng gi\u1eefa nh\u00e0 thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng v\u00e0 k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m.<\/p>\n<h2>C\u1ea5u tr\u00fac c\u1ee7a m\u1ed9t s\u01a1 \u0111\u1ed3 th\u1eddi gian chuy\u00ean nghi\u1ec7p \ud83d\udcca<\/h2>\n<p>\u0110\u1ec3 t\u1ea1o ra m\u1ed9t t\u00e0i li\u1ec7u h\u1eefu \u00edch cho vi\u1ec7c g\u1ee1 l\u1ed7i v\u00e0 t\u00e0i li\u1ec7u h\u00f3a, b\u1ea1n ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n c\u1ea5u tr\u00fac c\u1ee5 th\u1ec3. M\u1ed9t s\u01a1 \u0111\u1ed3 l\u1ed9n x\u1ed9n r\u1ea5t kh\u00f3 \u0111\u1ecdc v\u00e0 d\u1ec5 b\u1ecb hi\u1ec3u nh\u1ea7m. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ea7n thi\u1ebft \u0111\u1ec3 bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng.<\/p>\n<ul>\n<li><strong>T\u00ean t\u00edn hi\u1ec7u:<\/strong> M\u1ed7i \u0111\u01b0\u1eddng ph\u1ea3i c\u00f3 nh\u00e3n duy nh\u1ea5t. Tr\u00e1nh d\u00f9ng c\u00e1c t\u00ean chung chung nh\u01b0 &#8220;<code>Signal_1<\/code>. S\u1eed d\u1ee5ng c\u00e1c ch\u1eef vi\u1ebft t\u1eaft chu\u1ea9n nh\u01b0 &#8220;<code>MOSI<\/code> ho\u1eb7c &#8220;<code>RST<\/code>.<\/li>\n<li><strong>\u0110i\u1ec3m \u0111\u00e1nh d\u1ea5u th\u1eddi gian:<\/strong> C\u00e1c \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t \u0111\u1ee9ng th\u01b0\u1eddng ch\u1ec9 ra c\u00e1c \u0111i\u1ec3m quan tr\u1ecdng c\u1ee5 th\u1ec3. Ch\u00fang gi\u00fap c\u0103n ch\u1ec9nh c\u00e1c s\u1ef1 ki\u1ec7n gi\u1eefa nhi\u1ec1u t\u00edn hi\u1ec7u, v\u00ed d\u1ee5 nh\u01b0 m\u1ed9t c\u1ea1nh \u0111\u1ed3ng h\u1ed3 k\u00edch ho\u1ea1t vi\u1ec7c \u0111\u1ecdc d\u1eef li\u1ec7u.<\/li>\n<li><strong>D\u1ea1ng s\u00f3ng:<\/strong>C\u00e1c t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 l\u00e0 h\u00ecnh vu\u00f4ng, h\u00ecnh tam gi\u00e1c ho\u1eb7c h\u00ecnh sin. \u0110\u1ed1i v\u1edbi ph\u1ea7n m\u1ec1m vi \u0111i\u1ec1u khi\u1ec3n, s\u00f3ng vu\u00f4ng l\u00e0 ti\u00eau chu\u1ea9n. C\u00e1c chuy\u1ec3n ti\u1ebfp s\u1eafc n\u00e9t cho th\u1ea5y vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i s\u1ea1ch s\u1ebd, trong khi c\u00e1c c\u1ea1nh tr\u00f2n c\u00f3 th\u1ec3 cho th\u1ea5y nhi\u1ec5u ho\u1eb7c gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng.<\/li>\n<li><strong>Ghi ch\u00fa:<\/strong>C\u00e1c ghi ch\u00fa v\u0103n b\u1ea3n gi\u1ea3i th\u00edch c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3. V\u00ed d\u1ee5, ghi ch\u00fa r\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c th\u1ea5p c\u00f3 ngh\u0129a l\u00e0 t\u00edn hi\u1ec7u th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3 khi \u0111i\u1ec7n \u00e1p th\u1ea5p.<\/li>\n<li><strong>Tham s\u1ed1:<\/strong>C\u00e1c gi\u00e1 tr\u1ecb th\u1eddi gian c\u1ee5 th\u1ec3 (nh\u01b0 &#8220;<code>t<sub>su<\/sub><\/code> cho th\u1eddi gian thi\u1ebft l\u1eadp) c\u1ea7n \u0111\u01b0\u1ee3c ghi ch\u00fa tr\u00ean s\u01a1 \u0111\u1ed3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c gi\u1edbi h\u1ea1n.<\/li>\n<\/ul>\n<p>Khi v\u1ebd b\u1eb1ng tay ho\u1eb7c s\u1eed d\u1ee5ng b\u1ea3ng v\u1ebd th\u00f4ng th\u01b0\u1eddng, t\u00ednh nh\u1ea5t qu\u00e1n l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t. \u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c chuy\u1ec3n ti\u1ebfp th\u1eb3ng \u0111\u1ee9ng \u0111\u1ec1u tr\u00f9ng kh\u1edbp ho\u00e0n h\u1ea3o v\u1edbi c\u00e1c m\u1ed1c th\u1eddi gian b\u1ea1n x\u00e1c \u0111\u1ecbnh. S\u1ef1 sai l\u1ec7ch s\u1ebd t\u1ea1o ra s\u1ef1 m\u01a1 h\u1ed3.<\/p>\n<h2>Quy tr\u00ecnh t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 t\u1ea1o ra \ud83d\udcdd<\/h2>\n<p>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. N\u00f3 b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c thu th\u1eadp y\u00eau c\u1ea7u v\u00e0 k\u1ebft th\u00fac b\u1eb1ng vi\u1ec7c ki\u1ec3m tra \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u00f5 r\u00e0ng. H\u00e3y tu\u00e2n theo c\u00e1c b\u01b0\u1edbc n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 ph\u1ea3n \u00e1nh ch\u00ednh x\u00e1c h\u00e0nh vi mong mu\u1ed1n.<\/p>\n<ol>\n<li><strong>X\u00e1c \u0111\u1ecbnh c\u00e1c t\u00edn hi\u1ec7u:<\/strong>Li\u1ec7t k\u00ea t\u1ea5t c\u1ea3 c\u00e1c ch\u00e2n tham gia v\u00e0o t\u01b0\u01a1ng t\u00e1c. Bao g\u1ed3m c\u00e1c \u0111\u01b0\u1eddng d\u1eef li\u1ec7u, \u0111\u01b0\u1eddng \u0111i\u1ec1u khi\u1ec3n v\u00e0 ngu\u1ed3n \u0111\u1ed3ng h\u1ed3.<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng:<\/strong>Quy\u1ebft \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p n\u00e0o k\u00edch ho\u1ea1t h\u00e0nh \u0111\u1ed9ng. Ch\u00e2n ch\u1ecdn chip ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c cao hay m\u1ee9c th\u1ea5p? \u0110i\u1ec1u n\u00e0y ph\u1ea3i r\u00f5 r\u00e0ng trong s\u01a1 \u0111\u1ed3.<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh ngu\u1ed3n \u0111\u1ed3ng h\u1ed3:<\/strong>X\u00e1c \u0111\u1ecbnh n\u01a1i b\u1eaft ngu\u1ed3n c\u1ee7a th\u1eddi gian. N\u00f3 c\u00f3 n\u1eb1m b\u00ean trong vi \u0111i\u1ec1u khi\u1ec3n hay \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi m\u1ed9t tinh th\u1ec3 b\u00ean ngo\u00e0i?<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh tr\u00ecnh t\u1ef1:<\/strong>V\u1ebd tr\u00ecnh t\u1ef1 c\u00e1c s\u1ef1 ki\u1ec7n. B\u1eaft \u0111\u1ea7u b\u1eb1ng t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t, ti\u1ebfp theo l\u00e0 truy\u1ec1n d\u1eef li\u1ec7u, v\u00e0 k\u1ebft th\u00fac b\u1eb1ng t\u00edn hi\u1ec7u ho\u00e0n t\u1ea5t.<\/li>\n<li><strong>Ghi ch\u00fa c\u00e1c tham s\u1ed1 th\u1eddi gian:<\/strong>Th\u00eam c\u00e1c gi\u00e1 tr\u1ecb th\u1eddi gian c\u1ee5 th\u1ec3 y\u00eau c\u1ea7u b\u1edfi t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt. Kh\u00f4ng \u0111\u01b0\u1ee3c \u0111o\u00e1n c\u00e1c gi\u00e1 tr\u1ecb n\u00e0y.<\/li>\n<li><strong>Ki\u1ec3m tra \u0111\u1ed1i chi\u1ebfu v\u1edbi ph\u1ea7n c\u1ee9ng:<\/strong>So s\u00e1nh s\u01a1 \u0111\u1ed3 v\u1edbi s\u01a1 \u0111\u1ed3 m\u1ea1ch v\u00e0 t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n.<\/li>\n<\/ol>\n<p>Th\u01b0\u1eddng xuy\u00ean h\u1eefu \u00edch khi v\u1ebd ra t\u00ecnh hu\u1ed1ng x\u1ea5u nh\u1ea5t. N\u1ebfu ph\u1ea7n m\u1ec1m c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n th\u1eddi gian x\u1ea5u nh\u1ea5t, th\u00ec n\u00f3 s\u1ebd ho\u1ea1t \u0111\u1ed9ng trong m\u1ecdi \u0111i\u1ec1u ki\u1ec7n.<\/p>\n<h2>C\u00e1c giao th\u1ee9c truy\u1ec1n th\u00f4ng ph\u1ed5 bi\u1ebfn v\u00e0 s\u01a1 \u0111\u1ed3 c\u1ee7a ch\u00fang \ud83d\udd0c<\/h2>\n<p>C\u00e1c giao di\u1ec7n ph\u1ea7n c\u1ee9ng kh\u00e1c nhau c\u00f3 y\u00eau c\u1ea7u th\u1eddi gian ri\u00eang bi\u1ec7t. Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c m\u1eabu chu\u1ea9n cho c\u00e1c giao th\u1ee9c n\u00e0y gi\u00fap b\u1ea1n nhanh ch\u00f3ng ph\u00e1t hi\u1ec7n v\u1ea5n \u0111\u1ec1 khi s\u01a1 \u0111\u1ed3 kh\u00f4ng kh\u1edbp v\u1edbi h\u00e0nh vi quan s\u00e1t \u0111\u01b0\u1ee3c. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c v\u00ed d\u1ee5 v\u1ec1 c\u00e1ch c\u00e1c giao th\u1ee9c n\u00e0y th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n.<\/p>\n<table>\n<thead>\n<tr>\n<th>Giao th\u1ee9c<\/th>\n<th>C\u00e1c t\u00edn hi\u1ec7u ch\u00ednh<\/th>\n<th>\u0110\u1eb7c \u0111i\u1ec3m th\u1eddi gian<\/th>\n<th>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>UART<\/strong><\/td>\n<td>TX, RX, GND<\/td>\n<td>B\u1ea5t \u0111\u1ed3ng b\u1ed9, bit b\u1eaft \u0111\u1ea7u\/d\u1eebng<\/td>\n<td>\u0110\u1ea7u ra b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, g\u1ee1 l\u1ed7i n\u1ed1i ti\u1ebfp<\/td>\n<\/tr>\n<tr>\n<td><strong>I2C<\/strong><\/td>\n<td>SDA, SCL<\/td>\n<td>\u0110\u1ed3ng b\u1ed9, m\u1edf c\u1eeda<\/td>\n<td>C\u1ea3m bi\u1ebfn, EEPROM<\/td>\n<\/tr>\n<tr>\n<td><strong>SPI<\/strong><\/td>\n<td>SCK, MOSI, MISO, CS<\/td>\n<td>\u0110\u1ed3ng b\u1ed9, to\u00e0n \u0111\u00f4i<\/td>\n<td>B\u1ed9 nh\u1edb flash, M\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb<\/td>\n<\/tr>\n<tr>\n<td><strong>1-Wire<\/strong><\/td>\n<td>D\u1eef li\u1ec7u, GND<\/td>\n<td>D\u00e2y \u0111\u01a1n, khe th\u1eddi gian<\/td>\n<td>C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ed1i v\u1edbi I2C, s\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3i hi\u1ec3n th\u1ecb \u0111i\u1ec1u ki\u1ec7n b\u1eaft \u0111\u1ea7u (SDA xu\u1ed1ng th\u1ea5p khi SCL cao) v\u00e0 \u0111i\u1ec1u ki\u1ec7n d\u1eebng (SDA l\u00ean cao khi SCL cao). Bit x\u00e1c nh\u1eadn (ACK) c\u0169ng r\u1ea5t quan tr\u1ecdng v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u r\u00f5 r\u00e0ng.<\/p>\n<p>\u0110\u1ed1i v\u1edbi SPI, s\u01a1 \u0111\u1ed3 ph\u1ea3i ch\u1ec9 ra c\u1ef1c t\u00ednh c\u1ee7a t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3. D\u1eef li\u1ec7u thay \u0111\u1ed5i \u1edf c\u1ea1nh l\u00ean hay c\u1ea1nh xu\u1ed1ng? \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi c\u00e0i \u0111\u1eb7t pha \u0111\u1ed3ng h\u1ed3 trong thanh ghi c\u1ea5u h\u00ecnh ph\u1ea7n m\u1ec1m.<\/p>\n<h2>C\u00e1c tham s\u1ed1 th\u1eddi gian quan tr\u1ecdng \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch \u23f1\ufe0f<\/h2>\n<p>Khi c\u00e1c k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian, h\u1ecd t\u00ecm ki\u1ebfm c\u00e1c r\u00e0ng bu\u1ed9c c\u1ee5 th\u1ec3 quy\u1ebft \u0111\u1ecbnh c\u00e1ch m\u00e3 ph\u1ea3i \u0111\u01b0\u1ee3c vi\u1ebft. B\u1ecf qua c\u00e1c tham s\u1ed1 n\u00e0y l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y ra l\u1ed7i kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n<h3>Th\u1eddi gian thi\u1ebft l\u1eadp (<code>t<sub>su<\/sub><\/code>)<\/h3>\n<p>Th\u1eddi gian thi\u1ebft l\u1eadp l\u00e0 kho\u1ea3ng th\u1eddi gian t\u1ed1i thi\u1ec3u m\u00e0 t\u00edn hi\u1ec7u d\u1eef li\u1ec7u ph\u1ea3i \u1ed5n \u0111\u1ecbnh tr\u01b0\u1edbc khi x\u1ea3y ra c\u1ea1nh \u0111\u1ed3ng h\u1ed3. N\u1ebfu ph\u1ea7n m\u1ec1m thay \u0111\u1ed5i d\u1eef li\u1ec7u qu\u00e1 nhanh tr\u01b0\u1edbc khi \u0111\u1ed3ng h\u1ed3 k\u00edch ho\u1ea1t thao t\u00e1c \u0111\u1ecdc, d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c l\u1ea5y m\u1eabu sai. Trong m\u00e3 ngu\u1ed3n, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 c\u00f3 ngh\u0129a l\u00e0 tr\u00ec ho\u00e3n vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i ch\u00e2n \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c \u0111\u1ea3m b\u1ea3o ng\u1eaft \u0111\u01b0\u1ee3c v\u00f4 hi\u1ec7u h\u00f3a trong qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp d\u1eef li\u1ec7u quan tr\u1ecdng.<\/p>\n<h3>Th\u1eddi gian gi\u1eef (<code>t<sub>h<\/sub><\/code>)<\/h3>\n<p>Th\u1eddi gian gi\u1eef l\u00e0 kho\u1ea3ng th\u1eddi gian t\u1ed1i thi\u1ec3u m\u00e0 t\u00edn hi\u1ec7u d\u1eef li\u1ec7u ph\u1ea3i duy tr\u00ec \u1ed5n \u0111\u1ecbnh sau c\u1ea1nh \u0111\u1ed3ng h\u1ed3. N\u1ebfu t\u00edn hi\u1ec7u thay \u0111\u1ed5i qu\u00e1 s\u1edbm sau khi \u0111\u1ed3ng h\u1ed3 x\u1ea3y ra, thi\u1ebft b\u1ecb nh\u1eadn c\u00f3 th\u1ec3 kh\u00f4ng ghi nh\u1eadn \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c giao di\u1ec7n t\u1ed1c \u0111\u1ed9 cao, n\u01a1i b\u1ed9 x\u1eed l\u00fd c\u00f3 th\u1ec3 nhanh h\u01a1n thi\u1ebft b\u1ecb ngo\u1ea1i vi.<\/p>\n<h3>\u0110\u1ed9 tr\u1ec5 lan truy\u1ec1n (<code>t<sub>pd<\/sub><\/code>)<\/h3>\n<p>\u0110\u00e2y l\u00e0 kho\u1ea3ng th\u1eddi gian \u0111\u1ec3 m\u1ed9t t\u00edn hi\u1ec7u \u0111i t\u1eeb \u0111\u1ea7u v\u00e0o c\u1ee7a th\u00e0nh ph\u1ea7n \u0111\u1ebfn \u0111\u1ea7u ra c\u1ee7a n\u00f3. Trong ph\u1ea7n m\u1ec1m, \u0111i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c ph\u1ea3n h\u1ed3i \u0111\u01b0\u1ee3c mong \u0111\u1ee3i nhanh \u0111\u1ebfn m\u1ee9c n\u00e0o sau khi g\u1eedi l\u1ec7nh. N\u1ebfu ph\u1ea7n m\u1ec1m ki\u1ec3m tra tr\u1ea1ng th\u00e1i qu\u00e1 s\u1edbm, n\u00f3 c\u00f3 th\u1ec3 \u0111\u1ecdc d\u1eef li\u1ec7u c\u0169.<\/p>\n<h3>T\u1ea7n s\u1ed1 v\u00e0 chu k\u1ef3 \u0111\u1ed3ng h\u1ed3<\/h3>\n<p>Chu k\u1ef3 \u0111\u1ed3ng h\u1ed3 l\u00e0 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a t\u1ea7n s\u1ed1. N\u1ebfu \u0111\u1ed3ng h\u1ed3 l\u00e0 1 MHz, chu k\u1ef3 l\u00e0 1 vi gi\u00e2y. T\u1ea5t c\u1ea3 c\u00e1c tham s\u1ed1 th\u1eddi gian ph\u1ea3i \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi chu k\u1ef3 n\u00e0y. Th\u1eddi gian thi\u1ebft l\u1eadp 500ns l\u00e0 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c v\u1edbi \u0111\u1ed3ng h\u1ed3 1MHz nh\u01b0ng c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i v\u1edbi \u0111\u1ed3ng h\u1ed3 100MHz.<\/p>\n<h2>Xem x\u00e9t ph\u1ea7n m\u1ec1m v\u00e0 th\u1eddi gian th\u1ef1c thi m\u00e3 \ud83d\udda5\ufe0f<\/h2>\n<p>S\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00f4ng ch\u1ec9 li\u00ean quan \u0111\u1ebfn ph\u1ea7n c\u1ee9ng; n\u00f3 c\u00f2n li\u00ean quan \u0111\u1ebfn c\u00e1ch tr\u00ecnh bi\u00ean d\u1ecbch chuy\u1ec3n \u0111\u1ed5i m\u00e3 c\u1ee7a b\u1ea1n th\u00e0nh c\u00e1c l\u1ec7nh m\u00e1y. S\u01a1 \u0111\u1ed3 ph\u1ea3i t\u00ednh \u0111\u1ebfn th\u1eddi gian th\u1ef1c thi c\u1ee7a logic ph\u1ea7n m\u1ec1m ch\u00ednh n\u00f3.<\/p>\n<ul>\n<li><strong>\u0110\u1ed9 tr\u1ec5 ng\u1eaft:<\/strong>Khi m\u1ed9t ng\u1eaft x\u1ea3y ra, b\u1ed9 x\u1eed l\u00fd t\u1ea1m d\u1eebng c\u00f4ng vi\u1ec7c hi\u1ec7n t\u1ea1i \u0111\u1ec3 th\u1ef1c thi Th\u1ee7 t\u1ee5c ph\u1ee5c v\u1ee5 ng\u1eaft (ISR). Th\u1eddi gian \u0111\u1ec3 v\u00e0o ISR ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh v\u00e0o ng\u00e2n s\u00e1ch th\u1eddi gian. N\u1ebfu ISR m\u1ea5t qu\u00e1 l\u00e2u, b\u1ea1n c\u00f3 th\u1ec3 b\u1ecf l\u1ee1 c\u1ea1nh \u0111\u1ed3ng h\u1ed3 ti\u1ebfp theo.<\/li>\n<li><strong>V\u00f2ng l\u1eb7p ki\u1ec3m tra:<\/strong>N\u1ebfu b\u1ea1n ki\u1ec3m tra m\u1ed9t bit tr\u1ea1ng th\u00e1i trong m\u1ed9t v\u00f2ng l\u1eb7p, th\u1eddi gian th\u1ef1c hi\u1ec7n v\u00f2ng l\u1eb7p s\u1ebd x\u00e1c \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng c\u1ee7a b\u1ea1n. M\u1ed9t v\u00f2ng l\u1eb7p ch\u1eb7t ch\u1ebd ti\u00eau t\u1ed1n \u00edt th\u1eddi gian h\u01a1n so v\u1edbi v\u00f2ng l\u1eb7p c\u00f3 c\u00e1c ph\u00e9p t\u00ednh ph\u1ee9c t\u1ea1p.<\/li>\n<li><strong>T\u1ed1i \u01b0u h\u00f3a tr\u00ecnh bi\u00ean d\u1ecbch:<\/strong>Tr\u00ecnh bi\u00ean d\u1ecbch c\u00f3 th\u1ec3 thay \u0111\u1ed5i th\u1ee9 t\u1ef1 c\u00e1c l\u1ec7nh ho\u1eb7c nh\u00fang c\u00e1c h\u00e0m. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 thay \u0111\u1ed5i th\u1eddi gian ch\u00ednh x\u00e1c c\u1ee7a vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i ch\u00e2n. \u0110\u1ed1i v\u1edbi c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ea7n th\u1eddi gian ch\u00ednh x\u00e1c, b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n s\u1eed d\u1ee5ng m\u00e3 h\u1ee3p ng\u1eef ho\u1eb7c c\u00e1c ch\u1ec9 th\u1ecb tr\u00ecnh bi\u00ean d\u1ecbch c\u1ee5 th\u1ec3 \u0111\u1ec3 ng\u0103n t\u1ed1i \u01b0u h\u00f3a l\u00e0m thay \u0111\u1ed5i th\u1ee9 t\u1ef1.<\/li>\n<li><strong>\u0110i\u1ec1u ph\u1ed1i bus:<\/strong>N\u1ebfu nhi\u1ec1u b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u00f9ng ki\u1ec3m so\u00e1t bus, s\u01a1 \u0111\u1ed3 th\u1eddi gian ph\u1ea3i th\u1ec3 hi\u1ec7n qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ph\u1ed1i. Ph\u1ea7n m\u1ec1m ph\u1ea3i bi\u1ebft ph\u1ea3i ch\u1edd bao l\u00e2u cho \u0111\u1ebfn khi bus r\u1ea3nh.<\/li>\n<\/ul>\n<h2>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u26a0\ufe0f<\/h2>\n<p>Ngay c\u1ea3 c\u00e1c k\u1ef9 s\u01b0 c\u00f3 kinh nghi\u1ec7m c\u0169ng m\u1eafc sai l\u1ea7m khi v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y. Nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn s\u1ebd gi\u00fap b\u1ea1n t\u1ea1o ra t\u00e0i li\u1ec7u \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/p>\n<ul>\n<li><strong>B\u1ecf qua tr\u1ea1ng th\u00e1i High-Z:<\/strong>Nhi\u1ec1u s\u01a1 \u0111\u1ed3 ch\u1ec9 th\u1ec3 hi\u1ec7n m\u1ee9c cao v\u00e0 th\u1ea5p. Tuy nhi\u00ean, nhi\u1ec1u giao di\u1ec7n s\u1eed d\u1ee5ng tr\u1ea1ng th\u00e1i High-Z (tr\u00f4i). N\u1ebfu m\u1ed9t ch\u00e2n \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng b\u1edfi b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ch\u00ednh, n\u00f3 s\u1ebd tr\u1edf th\u00e0nh tr\u1ea1ng th\u00e1i High-Z. S\u01a1 \u0111\u1ed3 c\u1ea7n ghi r\u00f5 \u0111i\u1ec1u n\u00e0y, v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch c\u00e1c \u0111i\u1ec7n tr\u1edf k\u00e9o l\u00ean ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li><strong>M\u1ee9c logic kh\u00f4ng ph\u00f9 h\u1ee3p:<\/strong>\u0110\u1ea3m b\u1ea3o c\u00e1c m\u1ee9c \u0111i\u1ec7n \u00e1p trong s\u01a1 \u0111\u1ed3 ph\u00f9 h\u1ee3p v\u1edbi d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt. M\u1ed9t s\u1ed1 chip ho\u1ea1t \u0111\u1ed9ng \u1edf 1,8V trong khi nh\u1eefng chip kh\u00e1c ho\u1ea1t \u0111\u1ed9ng \u1edf 3,3V. K\u1ebft h\u1ee3p ch\u00fang m\u00e0 kh\u00f4ng c\u00f3 b\u1ed9 chuy\u1ec3n m\u1ee9c c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng ph\u1ea7n c\u1ee9ng.<\/li>\n<li><strong>B\u1ecf qua c\u00e1c xung nhi\u1ec5u:<\/strong>Nh\u1eefng xung ng\u1eafn, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nhi\u1ec5u, \u0111\u00f4i khi c\u00f3 th\u1ec3 x\u1ea3y ra trong qu\u00e1 tr\u00ecnh chuy\u1ec3n ti\u1ebfp. N\u1ebfu ph\u1ea7n m\u1ec1m c\u1ee7a b\u1ea1n l\u1ea5y m\u1eabu trong l\u00fac c\u00f3 nhi\u1ec5u, n\u00f3 c\u00f3 th\u1ec3 hi\u1ec3u nh\u1ea7m tr\u1ea1ng th\u00e1i t\u1ea1m th\u1eddi l\u00e0 m\u1ed9t l\u1ec7nh h\u1ee3p l\u1ec7.<\/li>\n<li><strong>Ghi ch\u00fa m\u01a1 h\u1ed3:<\/strong>Tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1c nh\u00e3n nh\u01b0 \u201cch\u1edd\u201d ho\u1eb7c \u201ctr\u1ec5\u201d. H\u00e3y d\u00f9ng c\u00e1c gi\u00e1 tr\u1ecb th\u1eddi gian c\u1ee5 th\u1ec3 nh\u01b0 \u201c10\u00b5s\u201d ho\u1eb7c \u201c2 chu k\u1ef3 \u0111\u1ed3ng h\u1ed3\u201d. C\u00e1c nh\u00e3n m\u01a1 h\u1ed3 d\u1eabn \u0111\u1ebfn vi\u1ec7c suy \u0111o\u00e1n trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai.<\/li>\n<li><strong>Thi\u1ebfu ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n:<\/strong>S\u01a1 \u0111\u1ed3 th\u1eddi gian thay \u0111\u1ed5i theo s\u1ef1 thay \u0111\u1ed5i ph\u1ea7n c\u1ee9ng. Lu\u00f4n lu\u00f4n ghi s\u1ed1 phi\u00ean b\u1ea3n v\u00e0 ng\u00e0y th\u00e1ng v\u00e0o t\u00e0i li\u1ec7u. \u0110i\u1ec1u n\u00e0y ng\u0103n \u0111\u1ed9i ph\u1ea7n m\u1ec1m l\u00e0m vi\u1ec7c d\u1ef1a tr\u00ean th\u00f4ng s\u1ed1 \u0111\u00e3 l\u1ed7i th\u1eddi.<\/li>\n<\/ul>\n<h2>H\u1ee3p t\u00e1c v\u1edbi c\u00e1c nh\u00f3m ph\u1ea7n c\u1ee9ng \ud83e\udd1d<\/h2>\n<p>S\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 ng\u00f4n ng\u1eef chung gi\u1eefa c\u00e1c k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m v\u00e0 ph\u1ea7n c\u1ee9ng. H\u1ee3p t\u00e1c hi\u1ec7u qu\u1ea3 \u0111\u1ea3m b\u1ea3o c\u1ea3 hai b\u00ean th\u1ed1ng nh\u1ea5t v\u1ec1 h\u00e0nh vi giao di\u1ec7n tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u vi\u1ebft m\u00e3.<\/p>\n<ul>\n<li><strong>Xem x\u00e9t s\u1edbm:<\/strong>Chia s\u1ebb s\u01a1 \u0111\u1ed3 b\u1ea3n nh\u00e1p v\u1edbi nh\u00f3m ph\u1ea7n c\u1ee9ng tr\u01b0\u1edbc khi vi\u1ebft b\u1ea5t k\u1ef3 m\u00e3 \u0111i\u1ec1u khi\u1ec3n n\u00e0o. H\u1ecd c\u00f3 th\u1ec3 x\u00e1c minh xem c\u00e1c gi\u1edbi h\u1ea1n \u0111i\u1ec7n c\u00f3 kh\u1ea3 thi v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00e3 ch\u1ecdn hay kh\u00f4ng.<\/li>\n<li><strong>L\u00e0m r\u00f5 c\u00e1c t\u00edn hi\u1ec7u x\u00e1c nh\u1eadn:<\/strong>X\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c c\u00e1ch thi\u1ebft b\u1ecb b\u00e1o hi\u1ec7u \u0111\u00e3 s\u1eb5n s\u00e0ng. C\u00f3 ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn ri\u00eang bi\u1ec7t hay c\u01a1 ch\u1ebf h\u1ebft th\u1eddi gian? S\u01a1 \u0111\u1ed3 ph\u1ea3i hi\u1ec3n th\u1ecb r\u00f5 r\u00e0ng tr\u00ecnh t\u1ef1 x\u00e1c nh\u1eadn.<\/li>\n<li><strong>Th\u1ea3o lu\u1eadn v\u1ec1 c\u00e1c tr\u1ea1ng th\u00e1i ngu\u1ed3n \u0111i\u1ec7n:<\/strong>Thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 ng\u1ee7 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng. S\u01a1 \u0111\u1ed3 c\u1ea7n ch\u1ec9 r\u00f5 c\u00e1c tham s\u1ed1 th\u1eddi gian c\u00f3 thay \u0111\u1ed5i khi thi\u1ebft b\u1ecb \u0111ang ho\u1ea1t \u0111\u1ed9ng hay \u1edf ch\u1ebf \u0111\u1ed9 ch\u1edd hay kh\u00f4ng.<\/li>\n<li><strong>H\u1ed7 tr\u1ee3 g\u1ee1 l\u1ed7i:<\/strong>Khi x\u1ea3y ra l\u1ed7i, s\u01a1 \u0111\u1ed3 \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u01a1 s\u1edf tham chi\u1ebfu. N\u1ebfu c\u00e1c d\u1ea1ng s\u00f3ng quan s\u00e1t \u0111\u01b0\u1ee3c tr\u00ean m\u00e1y hi\u1ec7n s\u00f3ng kh\u00f4ng kh\u1edbp v\u1edbi s\u01a1 \u0111\u1ed3, s\u01a1 \u0111\u1ed3 c\u00f3 th\u1ec3 sai ho\u1eb7c ph\u1ea7n c\u1ee9ng b\u1ecb l\u1ed7i.<\/li>\n<\/ul>\n<h2>Ph\u00e2n t\u00edch n\u00e2ng cao: Dao \u0111\u1ed9ng v\u00e0 nhi\u1ec5u \ud83e\udde0<\/h2>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng t\u1ed1c \u0111\u1ed9 cao ho\u1eb7c nh\u1ea1y c\u1ea3m, c\u00e1c s\u00f3ng vu\u00f4ng \u0111\u01a1n gi\u1ea3n l\u00e0 ch\u01b0a \u0111\u1ee7. B\u1ea1n ph\u1ea3i t\u00ednh \u0111\u1ebfn s\u1ef1 bi\u1ebfn \u0111\u1ed5i trong th\u1eddi gian t\u00edn hi\u1ec7u.<\/p>\n<h3>Dao \u0111\u1ed9ng<\/h3>\n<p>Dao \u0111\u1ed9ng l\u00e0 s\u1ef1 l\u1ec7ch c\u1ee7a m\u00e9p t\u00edn hi\u1ec7u kh\u1ecfi v\u1ecb tr\u00ed l\u00fd t\u01b0\u1edfng theo th\u1eddi gian. Dao \u0111\u1ed9ng cao c\u00f3 th\u1ec3 g\u00e2y l\u1ed7i d\u1eef li\u1ec7u n\u1ebfu kho\u1ea3ng th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 gi\u1eef qu\u00e1 nh\u1ecf. Trong ph\u1ea7n m\u1ec1m, b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n tri\u1ec3n khai l\u1ecdc ph\u1ea7n m\u1ec1m ho\u1eb7c t\u0103ng t\u1ed1c \u0111\u1ed9 l\u1ea5y m\u1eabu \u0111\u1ec3 gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng c\u1ee7a dao \u0111\u1ed9ng.<\/p>\n<h3>Kho\u1ea3ng an to\u00e0n v\u1edbi nhi\u1ec5u<\/h3>\n<p>C\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n t\u1eed d\u1ec5 b\u1ecb nhi\u1ec5u \u0111i\u1ec7n. S\u01a1 \u0111\u1ed3 th\u1eddi gian c\u1ea7n ph\u1ea3n \u00e1nh c\u00e1c kho\u1ea3ng an to\u00e0n v\u1edbi nhi\u1ec5u do nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ecbnh ngh\u0129a. N\u1ebfu \u0111i\u1ec7n \u00e1p gi\u1ea3m nh\u1eb9 d\u01b0\u1edbi ng\u01b0\u1ee1ng do nhi\u1ec5u, tr\u1ea1ng th\u00e1i logic kh\u00f4ng n\u00ean chuy\u1ec3n \u0111\u1ed5i b\u1ea5t ng\u1edd. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng v\u00f9ng \u0111\u01b0\u1ee3c t\u00f4 m\u00e0u tr\u00ean tr\u1ee5c \u0111\u1ee9ng.<\/p>\n<h2>Ti\u00eau chu\u1ea9n t\u00e0i li\u1ec7u v\u00e0 qu\u1ea3n l\u00fd t\u1eadp tin \ud83d\udcc2<\/h2>\n<p>Sau khi s\u01a1 \u0111\u1ed3 ho\u00e0n th\u00e0nh, c\u00e1ch b\u1ea1n l\u01b0u tr\u1eef v\u00e0 chia s\u1ebb n\u00f3 l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng. M\u1ed9t t\u1eadp tin \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd k\u00e9m c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn xung \u0111\u1ed9t phi\u00ean b\u1ea3n v\u00e0 hi\u1ec3u l\u1ea7m.<\/p>\n<ul>\n<li><strong>\u0110\u1eb7t t\u00ean chu\u1ea9n h\u00f3a:<\/strong>S\u1eed d\u1ee5ng quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean bao g\u1ed3m t\u00ean giao di\u1ec7n, phi\u00ean b\u1ea3n v\u00e0 ng\u00e0y. V\u00ed d\u1ee5:<code>UART_Interface_v1.2_2023-10-05.pdf<\/code>.<\/li>\n<li><strong>Ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng:<\/strong>PDF \u0111\u01b0\u1ee3c \u01b0u ti\u00ean cho ph\u00e2n ph\u1ed1i cu\u1ed1i c\u00f9ng v\u00ec n\u00f3 gi\u1eef nguy\u00ean \u0111\u1ecbnh d\u1ea1ng. C\u00e1c \u0111\u1ecbnh d\u1ea1ng c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda (nh\u01b0 SVG ho\u1eb7c \u0111\u1ed3 h\u1ecda vector) n\u00ean \u0111\u01b0\u1ee3c l\u01b0u trong ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n \u0111\u1ec3 c\u1eadp nh\u1eadt trong t\u01b0\u01a1ng lai.<\/li>\n<li><strong>Ch\u00fa th\u00edch v\u00e0 kh\u00f3a gi\u1ea3i th\u00edch:<\/strong>Bao g\u1ed3m m\u1ed9t ch\u00fa th\u00edch gi\u1ea3i th\u00edch t\u1ea5t c\u1ea3 c\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. V\u00ed d\u1ee5, gi\u1ea3i th\u00edch m\u0169i t\u00ean c\u1ee5 th\u1ec3 ho\u1eb7c v\u00f9ng t\u00f4 m\u00e0u \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec1u g\u00ec.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng truy c\u1eadp:<\/strong>\u0110\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c b\u1edfi to\u00e0n b\u1ed9 nh\u00f3m. L\u01b0u tr\u1eef n\u00f3 trong kho l\u01b0u tr\u1eef trung t\u00e2m n\u01a1i c\u1ea3 k\u1ef9 s\u01b0 ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m \u0111\u1ec1u c\u00f3 th\u1ec3 truy c\u1eadp m\u00e0 kh\u00f4ng b\u1ecb ch\u1eadm tr\u1ec5.<\/li>\n<\/ul>\n<h2>T\u00f3m t\u1eaft nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd \ud83d\udccc<\/h2>\n<p>Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 k\u1ef9 n\u0103ng c\u01a1 b\u1ea3n \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m n\u00e0o. N\u00f3 bi\u1ebfn m\u00e3 tr\u1eebu t\u01b0\u1ee3ng th\u00e0nh th\u1ef1c t\u1ebf v\u1eadt l\u00fd c\u00f3 th\u1ec3 \u0111o l\u01b0\u1eddng v\u00e0 x\u00e1c minh. B\u1eb1ng c\u00e1ch tu\u00e2n theo c\u00e1c b\u01b0\u1edbc \u0111\u01b0\u1ee3c n\u00eau trong h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n \u0111\u1ea3m b\u1ea3o t\u00e0i li\u1ec7u c\u1ee7a m\u00ecnh ch\u00ednh x\u00e1c, r\u00f5 r\u00e0ng v\u00e0 h\u1eefu \u00edch cho vi\u1ec7c g\u1ee1 l\u1ed7i.<\/p>\n<ul>\n<li>X\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng t\u1ea5t c\u1ea3 c\u00e1c t\u00edn hi\u1ec7u v\u00e0 tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang.<\/li>\n<li>Ghi nh\u00e3n c\u00e1c tham s\u1ed1 th\u1eddi gian c\u1ee5 th\u1ec3 nh\u01b0 th\u1eddi gian thi\u1ebft l\u1eadp v\u00e0 th\u1eddi gian gi\u1eef.<\/li>\n<li>T\u00ednh \u0111\u1ebfn th\u1eddi gian th\u1ef1c thi ph\u1ea7n m\u1ec1m v\u00e0 \u0111\u1ed9 tr\u1ec5 ng\u1eaft.<\/li>\n<li>H\u1ee3p t\u00e1c v\u1edbi c\u00e1c \u0111\u1ed9i ng\u0169 ph\u1ea7n c\u1ee9ng \u0111\u1ec3 x\u00e1c minh c\u00e1c r\u00e0ng bu\u1ed9c.<\/li>\n<li>Duy tr\u00ec ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n cho t\u1ea5t c\u1ea3 t\u00e0i li\u1ec7u.<\/li>\n<\/ul>\n<p>D\u00e0nh th\u1eddi gian cho c\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian ch\u00ednh x\u00e1c s\u1ebd gi\u1ea3m thi\u1ec3u r\u1ee7i ro h\u01b0 h\u1ecfng ph\u1ea7n c\u1ee9ng v\u00e0 l\u1ed7i ph\u1ea7n m\u1ec1m. N\u00f3 t\u1ea1o ra s\u1ef1 hi\u1ec3u bi\u1ebft chung gi\u00fap \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 tin c\u1eady s\u1ea3n ph\u1ea9m. Khi t\u00edch l\u0169y \u0111\u01b0\u1ee3c kinh nghi\u1ec7m, b\u1ea1n s\u1ebd nh\u1eadn th\u1ea5y r\u1eb1ng nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu trong quy tr\u00ecnh thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n, mang l\u1ea1i s\u1ef1 r\u00f5 r\u00e0ng trong c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang ph\u1ee9c t\u1ea1p.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ph\u00e1t tri\u1ec3n nh\u00fang ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o vi\u1ec7c \u0111\u1ed3ng b\u1ed9 h\u00f3a gi\u1eefa c\u00e1c l\u1ec7nh ph\u1ea7n m\u1ec1m v\u00e0 c\u00e1c t\u00edn hi\u1ec7u v\u1eadt l\u00fd t\u1eeb ph\u1ea7n c\u1ee9ng. Khi ph\u1ea7n m\u1ec1m nh\u00fang t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u1ea3m bi\u1ebfn, m\u00e0n h\u00ecnh hay c\u00e1c bus giao ti\u1ebfp, \u0111\u1ed9 ch\u00ednh x\u00e1c l\u00e0 \u0111i\u1ec1u kh\u00f4ng th\u1ec3 th\u01b0\u01a1ng l\u01b0\u1ee3ng. S\u01a1 \u0111\u1ed3 th\u1eddi gian [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1543,"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-1542","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>H\u01b0\u1edbng d\u1eabn nhanh: V\u1ebd s\u01a1 \u0111\u1ed3 th\u1eddi gian \u0111\u1ea7u ti\u00ean c\u1ee7a b\u1ea1n cho ph\u1ea7n m\u1ec1m nh\u00fang \ud83d\ude80<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian ch\u00ednh x\u00e1c cho ph\u1ea7n m\u1ec1m nh\u00fang. 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