{"id":8180,"date":"2025-12-24T09:23:10","date_gmt":"2025-12-24T00:23:10","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=8180"},"modified":"2025-12-24T09:23:14","modified_gmt":"2025-12-24T00:23:14","slug":"i2c-%ec%84%b8%eb%b6%80-%ec%82%ac%ed%95%ad","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/i2c-%ec%84%b8%eb%b6%80-%ec%82%ac%ed%95%ad\/","title":{"rendered":"i2c \uc138\ubd80 \uc0ac\ud56d"},"content":{"rendered":"\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/slva704.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"slva704\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-b377de71-2cdd-4452-991a-051e40991892\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/slva704.pdf\">slva704<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/slva704.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-b377de71-2cdd-4452-991a-051e40991892\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"I2C\ub780?\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/C4Oi2FdWGB8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>I2C\uc758 **\uc911\uc7ac(Arbitration)**\ub294 \uc5ec\ub7ec \uac1c\uc758 \ub9c8\uc2a4\ud130\uac00 \ub3d9\uc2dc\uc5d0 \ub300\ud654\ub97c \uc2dc\uc791\ud558\ub824\uace0 \ud560 \ub54c, **&#8221;\uad50\ud1b5\uc815\ub9ac&#8221;**\ub97c \ud558\ub294 \uc544\uc8fc \ub611\ub611\ud55c \uaddc\uce59\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p>\uc55e\uc11c \ubc30\uc6b4 **\uc624\ud508 \ub4dc\ub808\uc778(Open-Drain)**\uacfc **\uc640\uc774\uc5b4\ub4dc AND(Wired-AND)**\uc758 \ud2b9\uc9d5\uc744 \uc0dd\uac01\ud558\uba74 \uc544\uc8fc \uc27d\uac8c \uc774\ud574\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud575\uc2ec\uc740 **&#8221;0(Low)\uc744 \ubcf4\ub0b8 \uc0ac\ub78c\uc774 1(High)\uc744 \ubcf4\ub0b8 \uc0ac\ub78c\uc744 \uc774\uae34\ub2e4&#8221;**\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. \uc911\uc7ac\uc758 \ud575\uc2ec \uc6d0\ub9ac: &#8220;\ub9d0\ud558\uba74\uc11c \ub4e3\uae30&#8221;<\/strong><\/h3>\n\n\n\n<p>I2C \ub9c8\uc2a4\ud130\ub4e4\uc740 \ub370\uc774\ud130\ub97c \ubcf4\ub0bc \ub54c \uadf8\ub0e5 \ub358\uc9c0\uae30\ub9cc \ud558\ub294 \uac8c \uc544\ub2c8\ub77c, **\ub0b4\uac00 \ubcf4\ub0b8 \ub370\uc774\ud130\uac00 \uc120(SDA)\uc5d0 \ub611\uac19\uc774 \ub098\ud0c0\ub098\uace0 \uc788\ub294\uc9c0 \uc2e4\uc2dc\uac04\uc73c\ub85c \ud655\uc778(\ubaa8\ub2c8\ud130\ub9c1)**\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Logic 1\uc744 \ubcf4\ub0bc \ub54c:<\/strong> \ub9c8\uc2a4\ud130\ub294 \uc2a4\uc704\uce58\ub97c \uc5fd\ub2c8\ub2e4. (\ud480\uc5c5 \uc800\ud56d\uc5d0 \uc758\ud574 \uc120\uc774 High\uac00 \ub418\uae38 \uae30\ub300\ud568)<\/li>\n\n\n\n<li><strong>Logic 0\uc744 \ubcf4\ub0bc \ub54c:<\/strong> \ub9c8\uc2a4\ud130\ub294 \uc2a4\uc704\uce58\ub97c \ub2eb\uc544 \uc120\uc744 \ubc14\ub2e5(GND)\uc73c\ub85c \uac15\uc81c\ub85c \ub04c\uc5b4\ub0b4\ub9bd\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. \uc911\uc7ac \uacfc\uc815 (Step-by-Step)<\/strong><\/h3>\n\n\n\n<p>\uc0c1\ud669: <strong>\ub9c8\uc2a4\ud130 A<\/strong>\uc640 <strong>\ub9c8\uc2a4\ud130 B<\/strong>\uac00 \uc815\ud655\ud788 \ub3d9\uc2dc\uc5d0 \ud1b5\uc2e0\uc744 \uc2dc\uc791\ud588\ub2e4\uace0 \uac00\uc815\ud574\ubd05\uc2dc\ub2e4.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\ube44\ud2b8 \ub2e8\uc704 \ube44\uad50:<\/strong> \ub450 \ub9c8\uc2a4\ud130\ub294 \uac01\uc790\uc758 \ub370\uc774\ud130\ub97c \ud55c \ube44\ud2b8\uc529 \ubcf4\ub0c5\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uacf5\ud1b5 \uad6c\uac04:<\/strong> \ucc98\uc74c \uba87 \ube44\ud2b8\uac00 \ub458 \ub2e4 &#8216;0&#8217;\uc774\uac70\ub098 \ub458 \ub2e4 &#8216;1&#8217;\uc774\ub77c\uba74, \ub450 \ub9c8\uc2a4\ud130\ub294 \uc11c\ub85c \ub2e4\ub978 \ub204\uad70\uac00\uac00 \uac19\uc774 \ub9d0\ud558\uace0 \uc788\ub2e4\ub294 \uc0ac\uc2e4\uc744 \uc804\ud600 \ubaa8\ub978 \ucc44 \uacc4\uc18d \uc804\uc1a1\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ucda9\ub3cc \ubc1c\uc0dd (\uacb0\uc815\uc801 \uc21c\uac04):<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>\ub9c8\uc2a4\ud130 A:<\/strong> \uc774\ubc88 \ube44\ud2b8\uc5d0\uc11c **&#8217;1&#8242;(High)**\uc744 \ubcf4\ub0b4\ub824\uace0 \uc2a4\uc704\uce58\ub97c \uc5f4\uc5c8\uc2b5\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ub9c8\uc2a4\ud130 B:<\/strong> \uc774\ubc88 \ube44\ud2b8\uc5d0\uc11c **&#8217;0&#8242;(Low)**\uc744 \ubcf4\ub0b4\ub824\uace0 \uc120\uc744 \uaf49 \ubd99\uc7a1\uc544 \ub0b4\ub838\uc2b5\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uacb0\uacfc:<\/strong> SDA \uc120\uc740 \ub9c8\uc2a4\ud130 B \ub54c\ubb38\uc5d0 **&#8217;0&#8242;(Low)**\uc774 \ub429\ub2c8\ub2e4. (Wired-AND \ud2b9\uc131)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\ud328\ubc30\uc790 \ubc1c\uacac:<\/strong> &#8216;1&#8217;\uc744 \ubcf4\ub0c8\ub358 <strong>\ub9c8\uc2a4\ud130 A<\/strong>\ub294 \uc120\uc744 \ud655\uc778\ud574\ubcf4\ub2c8 &#8216;0&#8217;\uc774 \ub418\uc5b4 \uc788\ub294 \uac83\uc744 \ubc1c\uacac\ud569\ub2c8\ub2e4. &#8220;\uc5b4? \ub09c 1\uc744 \ubcf4\ub0c8\ub294\ub370 \uc120\uc740 0\uc774\ub124? \ub098\ubcf4\ub2e4 \uc6b0\uc120\uc21c\uc704\uac00 \ub192\uc740 \ub204\uad70\uac00\uac00 \uc788\uad6c\ub098!&#8221;\ub77c\uace0 \ud310\ub2e8\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uc989\uc2dc \ud56d\ubcf5:<\/strong> \ub9c8\uc2a4\ud130 A\ub294 \uadf8 \uc989\uc2dc \uc804\uc1a1\uc744 \uc911\ub2e8\ud558\uace0 \uc190\uc744 \ub5cd\ub2c8\ub2e4. \uc774\ub97c **&#8217;\uc911\uc7ac \ud328\ubc30&#8217;**\ub77c\uace0 \ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uc2b9\uc790 \uacc4\uc18d:<\/strong> \ub9c8\uc2a4\ud130 B\ub294 \uc790\uae30\uac00 \ubcf4\ub0b8 &#8216;0&#8217;\uc774 \uc120\uc5d0\ub3c4 \uadf8\ub300\ub85c &#8216;0&#8217;\uc73c\ub85c \ub098\ud0c0\ub098\ubbc0\ub85c, \ubc29\ud574\ubc1b\uc9c0 \uc54a\uc558\ub2e4\uace0 \uc0dd\uac01\ud558\uace0 \uacc4\uc18d \ub370\uc774\ud130\ub97c \ubcf4\ub0c5\ub2c8\ub2e4. \uc774\ub97c **&#8217;\uc911\uc7ac \uc2b9\ub9ac&#8217;**\ub77c\uace0 \ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. \uc65c I2C \uc911\uc7ac\uac00 \ud6cc\ub96d\ud55c\uac00\uc694?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\ub370\uc774\ud130\uac00 \uae68\uc9c0\uc9c0 \uc54a\uc74c:<\/strong> \uc2b9\ub9ac\ud55c \ub9c8\uc2a4\ud130(\ub9c8\uc2a4\ud130 B)\ub294 \uc0c1\ub300\ubc29\uc774 \uc911\uac04\uc5d0 \ud3ec\uae30\ud588\ub2e4\ub294 \uc0ac\uc2e4\uc870\ucc28 \ubaa8\ub97c \uc815\ub3c4\ub85c \uc2e0\ud638\uc5d0 \uc544\ubb34\ub7f0 \uac04\uc12d\uc744 \ubc1b\uc9c0 \uc54a\uace0 \ud1b5\uc2e0\uc744 \uc774\uc5b4\uac11\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ud558\ub4dc\uc6e8\uc5b4 \uc790\ub3d9 \ucc98\ub9ac:<\/strong> \uac1c\ubc1c\uc790\uac00 \ucf54\ub4dc\ub85c &#8220;\ub204\uac00 \uba3c\uc800 \ubcf4\ub0bc\uc9c0&#8221; \uc815\ud574\uc904 \ud544\uc694\uac00 \uc5c6\uc2b5\ub2c8\ub2e4. \uce69 \ub0b4\ubd80\uc758 \ub85c\uc9c1\uc774 \uc54c\uc544\uc11c \ucc98\ub9ac\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uc790\uc5f0\uc2a4\ub7ec\uc6b4 \uc6b0\uc120\uc21c\uc704:<\/strong> \uc8fc\uc18c \uac12\uc774 \ub0ae\uc740 \uc7a5\uce58(\uc55e\ubd80\ubd84\uc5d0 &#8216;0&#8217;\uc774 \ub354 \ub9ce\uc740 \uc7a5\uce58)\uac00 \uc790\uc5f0\uc2a4\ub7fd\uac8c \uc6b0\uc120\uc21c\uc704\ub97c \uac16\uac8c \ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\uc694\uc57d\ud558\uc790\uba74<\/strong><\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>I2C \uc911\uc7ac\ub294 **&#8221;\ub204\uac00 \ub354 \uba3c\uc800 \uc120\uc744 Low(0)\ub85c \ub2f9\uae30\ub290\ub0d0&#8221;**\ub97c \uaca8\ub8e8\ub294 \uac8c\uc784\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p>&#8216;1&#8217;\uc744 \ubcf4\ub0b4\uba70 \ubc84\uc2a4 \uc0c1\ud0dc\ub97c \uad00\ucc30\ud558\ub358 \ub9c8\uc2a4\ud130\uac00, &#8216;0&#8217;\uc744 \ubcf4\ub0b4\uba70 \uc120\uc744 \uc7a5\uc545\ud55c \ub9c8\uc2a4\ud130\uc5d0\uac8c \uc870\uc6a9\ud788 \uc790\ub9ac\ub97c \uc591\ubcf4\ud558\ub294 \uc9c8\uc11c \uc815\uc5f0\ud55c \ubc29\uc2dd\uc785\ub2c8\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<p>\uc774\ud574\uac00 \uc880 \ub354 \ub418\uc168\ub098\uc694? \uc911\uc7ac\uac00 \ub05d\ub09c \ub4a4 \ud328\ubc30\ud55c \ub9c8\uc2a4\ud130\uac00 \uc5b4\ub5bb\uac8c \ud589\ub3d9\ud558\ub294\uc9c0 \ub4f1 \ucd94\uac00\ub85c \uad81\uae08\ud55c \uc810\uc774 \uc788\uc73c\uc2dc\uba74 \ub9d0\uc500\ud574 \uc8fc\uc138\uc694!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I2C\uc758 **\uc911\uc7ac(Arbitration)**\ub294 \uc5ec\ub7ec \uac1c\uc758 \ub9c8\uc2a4\ud130\uac00 \ub3d9\uc2dc\uc5d0 \ub300\ud654\ub97c \uc2dc\uc791\ud558\ub824\uace0 \ud560 \ub54c, **&#8221;\uad50\ud1b5\uc815\ub9ac&#8221;**\ub97c \ud558\ub294 \uc544\uc8fc \ub611\ub611\ud55c \uaddc\uce59\uc785\ub2c8\ub2e4. \uc55e\uc11c \ubc30\uc6b4 **\uc624\ud508 \ub4dc\ub808\uc778(Open-Drain)**\uacfc **\uc640\uc774\uc5b4\ub4dc [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"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-5)","background-image":"","background-repeat":"repeat","background-position":"center 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