{"id":2136,"date":"2018-07-09T02:32:21","date_gmt":"2018-07-09T02:32:21","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=2136"},"modified":"2025-03-11T15:05:59","modified_gmt":"2025-03-11T08:05:59","slug":"y-nghia-cua-thach-anh-trong-mach-dao-dong","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=2136","title":{"rendered":"\u00dd ngh\u0129a c\u1ee7a th\u1ea1ch anh trong M\u1ea1ch dao \u0111\u1ed9ng"},"content":{"rendered":"

Tr\u00ean main laptop th\u1ea1ch anh n\u1eb1m g\u1ea7n con IC xung clock 14.318Mhz, Chip Nam 32.768Mhz, EC\u2026..<\/span><\/p>\n

Th\u1ea1ch anh c\u00f3 k\u00ed hi\u1ec7u l\u00e0: X,Y. <\/span><\/p>\n

H\u00ecnh d\u1ea1ng c\u1ee7a th\u1ea1ch anh: Th\u1ea1ch anh c\u00f3 nhi\u1ec1u h\u00ecnh d\u1ea1ng nh\u01b0: H\u00ecnh ch\u1eef nh\u1eadt, c\u00f3 hai ch\u00e2n \u1edf hai b\u00ean \u0111\u1ea7u, h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 b\u1ed1n ch\u00e2n m\u1ed7i \u0111\u1ea7u c\u00f3 hai ch\u00e2n, h\u00ecnh elip c\u00f3 hai ch\u00e2n \u1edf hai b\u00ean \u0111\u1ea7u.<\/span><\/p>\n

\"\u00dd
\u00dd ngh\u0129a c\u1ee7a th\u1ea1ch anh trong m\u1ea1ch dao \u0111\u1ed9ng<\/figcaption><\/figure>\n

\u0110\u1ec3 ch\u1ea1y c\u00e1c c\u00e2u l\u1ec7nh trong ic vi \u0111i\u1ec1u khi\u1ec3n, B\u1ea1n c\u1ea7n t\u1ea1o ra xung nh\u1ecbp. T\u1ea7n s\u1ed1 xung nh\u1ecbp ph\u1ee5 thu\u1ed9c v\u00e0o th\u1ea1ch anh g\u1eafn tr\u00ean ch\u00e2n 18, 19. V\u1edbi th\u1ea1ch anh 12MHz, B\u1ea1n s\u1ebd c\u00f3 xung nh\u1ecbp 1MHz, nh\u01b0 v\u1eady chu k\u1ef3 l\u1ec7nh s\u1ebd l\u00e0 1us.<\/span><\/p>\n

\"M\u1ea1ch
M\u1ea1ch th\u1ea1ch anh \u0111\u1ecbnh t\u1ea7n<\/figcaption><\/figure>\n

\u0110\u1ec3 t\u0103ng \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh t\u1ea7n s\u1ed1, ng\u01b0\u1eddi ta d\u00f9ng th\u00eam 2 t\u1ee5 nh\u1ecf C6, C7 (33pF x2), t\u1ee5 b\u00f9 nhi\u1ec7t \u1ed5n t\u1ea7n.<\/span><\/p>\n

\u0110i\u1ec1u n\u00e0y cho th\u1ea5y, B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 thay \u0111\u1ed5i nh\u1ecbp nh\u1ea5p nh\u00e1y c\u1ee7a \u0111\u00e8n n\u1ebfu d\u00f9ng th\u1ea1ch anh c\u00f3 t\u1ea7n s\u1ed1 kh\u00e1c.<\/span><\/p>\n

\u1ee8ng d\u1ee5ng trong \u0111i\u1ec7n t\u1eed \u0111a ph\u1ea7n \u0111\u1ec3 t\u1ea1o t\u1ea7n s\u1ed1 \u0111\u01b0\u1ee3c \u1ed5n \u0111\u1ecbnh v\u00ec t\u1ea7n s\u1ed1 c\u1ee7a th\u1ea1ch anh t\u1ea1o ra \u00edt b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec7t \u0111\u1ed9 h\u01a1n l\u00e0 c\u00e1c m\u1ea1ch dao \u0111\u1ed9ng RC.<\/span><\/p>\n

Trong m\u1ea1ch vi x\u1eed l\u00fd b\u1eaft bu\u1ed9c ph\u1ea3i c\u00f3 th\u1ea1ch anh (tr\u1eeb c\u00e1c lo\u1ea1i c\u00f3 dao \u0111\u1ed9ng n\u1ed9i) v\u00ec x\u00e9t chi ti\u1ebft th\u00ec m\u1ea1ch vi x\u1eed l\u00fd c\u00f3 CPU, timer,… CPU bao g\u1ed3m c\u00e1c m\u1ea1ch logic v\u00e0 m\u1ea1ch logic mu\u1ed1n ho\u1ea1t \u0111\u1ed9ng c\u0169ng c\u1ea7n c\u00f3 xung clock, c\u00f2n timer th\u00ec g\u1ed3m c\u00e1c d\u00e3y FF c\u0169ng c\u1ea7n ph\u1ea3i c\u00f3 xung \u0111\u1ec3 \u0111\u1ebfm. T\u00f9y lo\u1ea1i m\u1ea1ch vi x\u1eed l\u00fd m\u00e0 bao nhi\u00eau xung clock th\u00ec \u1ee9ng v\u1edbi 1 chu k\u00ec m\u00e1y, v\u00e0 v\u1edbi m\u1ed7i xung clock m\u1ea1ch vi x\u1eed l\u00fd s\u1ebd \u0111i l\u00e0m 1 c\u00f4ng vi\u1ec7c nh\u1ecf \u1ee9ng v\u1edbi l\u1ec7nh \u0111ang th\u1ef1c thi.<\/span><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra x\u00e1c \u0111\u1ecbnh h\u01b0 h\u1ecfng m\u1ea1ch dao \u0111\u1ed9ng s\u1eed d\u1ee5ng th\u1ea1ch anh<\/span><\/strong><\/p>\n

\"\u0110\u1ed3ng
\u0110\u1ed3ng h\u1ed3 Wellink 301 thang \u0111o Hz<\/figcaption><\/figure>\n

Hi\u1ec7n nay \u0111\u1ed3ng h\u1ed3 Wellink 301 ho\u1eb7c 401 h\u1ed7 tr\u1ee3 \u0111o th\u1ea1ch anh l\u00ean \u0111\u1ebfn 40Mhz \u0111\u1ee7 \u0111\u1ec3 \u0111o c\u00e1c th\u1ea1ch anh trong m\u1ea1ch.<\/span><\/p>\n

T\u00e2ng s\u1ed1 th\u1ea1nh anh \u0111o \u0111\u01b0\u1ee3c c\u1ee7a m\u1ea1ch Xung Clock ph\u1ea3i \u0111\u00fang 14.318Mhz . N\u1ebfu kh\u00f4ng m\u1ea1ch dao \u0111\u1ed9ng b\u1ecb l\u1ed7i ch\u01b0a ho\u1ea1t \u0111\u1ed9ng ho\u1eb7c IC hay th\u1ea1ch anh b\u1ecb l\u1ed7i.<\/span><\/p>\n

M\u1ecdi chi ti\u1ebft xin vui l\u00f2ng li\u00ean h\u1ec7:<\/i><\/p>\n

C\u00d4NG TY C\u1ed4 PH\u1ea6N H\u1eccC VI\u1ec6N IT<\/strong><\/p>\n

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H\u1ecdc vi\u1ec7n IT.vn \u2013 Truy\u1ec1n ngh\u1ec1 th\u1ef1c t\u1ebf c\u00f9ng b\u1ea1n \u0111\u1ebfn th\u00e0nh c\u00f4ng!\u00a0<\/i><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Tr\u00ean main laptop th\u1ea1ch anh n\u1eb1m g\u1ea7n con IC xung clock 14.318Mhz, Ch\u00edp Nam 32.768Mhz, EC\u2026..Th\u1ea1ch anh c\u00f3 \u00fd ngh\u0129a quan tr\u1ecdng trong m\u1ea1ch dao \u0111\u1ed9ng laptop. Th\u1ea1ch anh c\u00f3 k\u00ed hi\u1ec7u l\u00e0: X,Y.<\/p>\n","protected":false},"author":95,"featured_media":12288,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[734],"tags":[664],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/2136"}],"collection":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/users\/95"}],"replies":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2136"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/2136\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/12288"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2136"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}