{"id":3755,"date":"2023-09-06T08:25:58","date_gmt":"2023-09-06T08:25:58","guid":{"rendered":"https:\/\/staging.mixtile.com\/?post_type=ht_kb&#038;p=1404"},"modified":"2023-11-22T06:48:29","modified_gmt":"2023-11-22T06:48:29","slug":"enable-external-rtc","status":"publish","type":"ht_kb","link":"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/","title":{"rendered":"\u5916\u90e8RTC\u3092\u6709\u52b9\u306b\u3059\u308b"},"content":{"rendered":"<p>rk3568\u306ePMU rk809\u306f\u5185\u90e8RTC\u3092\u5099\u3048\u3066\u3044\u308b\u3002edge2\u306e\u96fb\u6e90\u304c\u5207\u308c\u305f\u5f8c\u3001\u5185\u8535RTC\u306f\u30b7\u30b9\u30c6\u30e0\u6642\u9593\u3092\u4fdd\u5b58\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u505c\u96fb\u5f8c\u306e\u30b7\u30b9\u30c6\u30e0\u6642\u9593\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b\u3001edge2\u306f\u5916\u90e8RTC HYM8563\u3068\u30dc\u30bf\u30f3\u96fb\u6c60\u30d9\u30fc\u30b9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u30dc\u30bf\u30f3\u96fb\u6c60\u3092\u53d6\u308a\u4ed8\u3051\u305f\u5f8c\u3001edge2\u306f\u30b7\u30b9\u30c6\u30e0\u6642\u9593\u3092\u4fdd\u5b58\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"introduction\">\u306f\u3058\u3081\u306b<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#introduction\"><\/a><\/h2>\n\n\n\n<p>\u30a8\u30c3\u30b82\u306fHYM8563\u3092RTC\u3068\u3057\u3066\u4f7f\u7528(<em>\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30af\u30ed\u30c3\u30af<\/em>).HYM8563\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30de\u30d6\u30eb\u30fb\u30af\u30ed\u30c3\u30af\u51fa\u529b\u3001\u5272\u308a\u8fbc\u307f\u51fa\u529b\u3001\u30d1\u30ef\u30fc\u30c0\u30a6\u30f3\u691c\u51fa\u5668\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u30a2\u30c9\u30ec\u30b9\u3068\u30c7\u30fc\u30bf\u306f\u3001I2C\u30d0\u30b9\u30fb\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4ecb\u3057\u3066\u30b7\u30ea\u30a2\u30eb\u306b\u6e21\u3055\u308c\u307e\u3059\u3002\u6700\u5927\u30d0\u30b9\u901f\u5ea6\u306f400Kbits\/s\u3067\u3059\u3002\u5404\u8aad\u307f\u51fa\u3057\u3068\u66f8\u304d\u8fbc\u307f\u306e\u5f8c\u3001\u5185\u8535\u30ef\u30fc\u30c9\u30fb\u30a2\u30c9\u30ec\u30b9\u30fb\u30ec\u30b8\u30b9\u30bf\u306f\u81ea\u52d5\u7684\u306b\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul><li>\u30bf\u30a4\u30df\u30f3\u30b0\u306f32.768kHz\u306e\u6c34\u6676\u632f\u52d5\u5b50\u3092\u30d9\u30fc\u30b9\u306b\u79d2\u3001\u5206\u3001\u6642\u3001\u9031\u3001\u65e5\u3001\u6708\u3001\u5e74\u3067\u8a2d\u5b9a\u53ef\u80fd<\/li><li>\u5e83\u3044\u52d5\u4f5c\u96fb\u5727\u7bc4\u56f2\uff1a1.0\u301c5.5V<\/li><li>\u4f4e\u9759\u6b62\u96fb\u6d41\uff1a\u901a\u5e380.25\u03bcA(VDD =3.0V\u3001TA =25\u00b0C)<\/li><li>\u5185\u8535\u767a\u632f\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc<\/li><li>\u30c9\u30ec\u30a4\u30f3\u30aa\u30fc\u30d7\u30f3\u5272\u308a\u8fbc\u307f\u7aef\u5b50<\/li><\/ul>\n\n\n\n<h2 id=\"using-interfaces\">\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u4f7f\u7528<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#using-interfaces\"><\/a><\/h2>\n\n\n\n<p>Linux\u306f3\u3064\u306e\u30e6\u30fc\u30b6\u30fc\u7a7a\u9593\u547c\u3073\u51fa\u3057\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u63d0\u4f9b\u3059\u308b\u3002Edge 2\u306e\u5bfe\u5fdc\u3059\u308b\u30d1\u30b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3042\u308b\uff1a<\/p>\n\n\n\n<ul><li><strong>SYSFS \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9 \uff1a<\/strong>\u00a0<code>\/sys\/class\/rtc\/rtc0\/\u3002<\/code><\/li><li><strong>PROCFS \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9 \uff1a<\/strong>\u00a0<code>\/proc\/driver\/rtc<\/code><\/li><li><strong>IOCTL \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9 \uff1a<\/strong>\u00a0<code>\/dev\/rtc0<\/code><\/li><\/ul>\n\n\n\n<h3>SYSFS\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#sysfs-interface\"><\/a><\/h3>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u4f7f\u7528&nbsp;<code>cat<\/code>&nbsp;\u305d\u3057\u3066&nbsp;<code>hwclock<\/code>&nbsp;\u3092\u76f4\u63a5\u64cd\u4f5c\u3067\u304d\u308b\u3002&nbsp;<code>\/sys\/class\/rtc\/rtc0\/\u3002<\/code>.<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001RTC\u3067\u73fe\u5728\u306e\u65e5\u4ed8\u3068\u6642\u523b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># cat \/sys\/class\/rtc\/rtc1\/date\n2021-10-14\n# cat \/sys\/class\/rtc\/rtc1\/time\n10:30:15\n<\/code><\/pre>\n\n\n\n<h3 id=\"procfs-interface\">PROCFS\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#procfs-interface\"><\/a><\/h3>\n\n\n\n<p>RTC\u95a2\u9023\u60c5\u5831\u3092\u5370\u5237\u3059\u308b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># cat \/proc\/driver\/rtc\nrtc_time    : 10:33:58\nrtc_date    : 2021-10-14\nalrm_time    : 11:06:00\nalrm_date    : 2021-10-14\nalarm_IRQ    : no\nalrm_pending    : no\nupdate IRQ enabled    : no\nperiodic IRQ enabled    : no\nperiodic IRQ frequency    : 1\nmax user IRQ frequency    : 64\n24hr        : yes\n<\/code><\/pre>\n\n\n\n<h3 id=\"ioctl-interface\">IOCTL\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#ioctl-interface\"><\/a><\/h3>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u4f7f\u7528&nbsp;<code>ioctl<\/code>&nbsp;\u305d\u3057\u3066&nbsp;<code>hwclock<\/code>&nbsp;\u3092\u76f4\u63a5\u64cd\u4f5c\u3067\u304d\u308b\u3002&nbsp;<code>\/dev\/rtc1<\/code>\u305d\u306e\u5834\u5408\u3001root\u30a2\u30ab\u30a6\u30f3\u30c8\u3067\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># hwclock -f \/dev\/rtc1\nThu Oct 14 10:36:21 2021 0.000000\u79d2\n<\/code><\/pre>\n\n\n\n<h2 id=\"faqs\">\u3088\u304f\u3042\u308b\u3054\u8cea\u554f<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#faqs\"><\/a><\/h2>\n\n\n\n<p>Q1: \u958b\u767a\u30dc\u30fc\u30c9\u306e\u96fb\u6e90\u3092\u5165\u308c\u305f\u5f8c\u3001\u6642\u523b\u304c\u305a\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002A1: RTC\u30dc\u30bf\u30f3\u96fb\u6c60\u304c\u6b63\u3057\u304f\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 id=\"rtc-driver\">RTC\u30c9\u30e9\u30a4\u30d0<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#rtc-driver\"><\/a><\/h2>\n\n\n\n[<strong>\u6ce8<\/strong>]:Mixtile \u304c\u30ea\u30ea\u30fc\u30b9\u3057\u305f Android \/ Debian \u306f\u3001\u3059\u3067\u306b\u30ab\u30fc\u30cd\u30eb\u3067 RTC \u6a5f\u80fd\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u307e\u3059\u3002Andorid \/ Debian\u30b7\u30b9\u30c6\u30e0\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u5834\u5408\u306f\u3001RTC\u30c9\u30e9\u30a4\u30d0\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>\u30ab\u30fc\u30cd\u30eb\u306eDTS\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30fb\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\uff1a<code>kernel\/arch\/arm64\/boot\/dts\/rockchip\/mixtile-edge2-evb.dtsi<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&amp;i2c3 {\n        status = \"okay\";\n    hym8563: hym8563@51 {\n        compatible = \"haoyu,hym8563\";\n        reg = ;\n        pinctrl-names = \"default\";\n        pinctrl-0 = ;\n        interrupt-parent = ;\n        interrupts = ;\n        status = \"okay\";\n    };\n};\n\n&amp;pinctrl {\n    rtc {\n        rtc_int: rtc-int {\n            rockchip,pins = ;\n        };\n    };\n}\n<\/code><\/pre>\n\n\n\n<p>\u30c9\u30e9\u30a4\u30d6\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\uff1a&nbsp;<code>\u30ab\u30fc\u30cd\u30eb\/\u30c9\u30e9\u30a4\u30d0\/rtc\/rtc-hym8563.c<\/code><\/p>\n\n\n\n<h2 id=\"activating-rtc\">RTC\u306e\u8d77\u52d5<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#activating-rtc\"><\/a><\/h2>\n\n\n\n<p>\u5916\u90e8RTC HYM8563\u304c\u6709\u52b9\u3067\u3001HYM8563\u306e\u6642\u523b\u3092\u540c\u671f\u3055\u305b\u308b\u305f\u3081\u306b\u30b7\u30b9\u30c6\u30e0\u6642\u523b\u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u30ab\u30fc\u30cd\u30eb\u3067\u306fRK809\u306e\u5185\u90e8RTC\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u4f7f\u7528\u3055\u308c\u308b\u304c\u3001\u30b7\u30b9\u30c6\u30e0\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\uff1a<\/p>\n\n\n\n<h3 id=\"modifying-kernel\">\u30ab\u30fc\u30cd\u30eb\u306e\u5909\u66f4<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#modifying-kernel\"><\/a><\/h3>\n\n\n\n<ul><li>DTS\u306e\u5909\u66f4<\/li><\/ul>\n\n\n\n<p>\u53c2\u7167&nbsp;<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#rtc-driver\"><strong>RTC\u30c9\u30e9\u30a4\u30d0<\/strong><\/a><\/p>\n\n\n\n<ul><li>\u8a2d\u5b9a\u306e\u5909\u66f4<\/li><\/ul>\n\n\n\n<p>\u4fee\u6b63\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u306f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>kernel\/arch\/arm64\/configs\/mixtile_edge2_defconfig\n<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3059\u308b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CONFIG_RTC_DRV_HYM8563=y\nCONFIG_RTC_HCTOSYS_DEVICE=\"rtc1\"\nCONFIG_RTC_SYSTOHC_DEVICE=\"rtc1\"\n<\/code><\/pre>\n\n\n\n<p>\u30ab\u30fc\u30cd\u30eb\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u306b\u306f&nbsp;<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/mixtile-os\/compile-from-source-code\/#compiling-kernel\"><strong>\u30ab\u30fc\u30cd\u30eb\u306e\u30b3\u30f3\u30d1\u30a4\u30eb<\/strong><\/a>&nbsp;\u306e\u7ae0\u3067\u8a73\u3057\u304f\u8aac\u660e\u3059\u308b\u3002<\/p>\n\n\n\n<p>boot.img\u3092\u713c\u304f\u306b\u306f\u3001\u4ee5\u4e0b\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002&nbsp;<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/getting-started\/update-firmware\/\"><strong>\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u306e\u66f4\u65b0<\/strong><\/a>&nbsp;\u306e\u7ae0\u3067\u8a73\u3057\u304f\u8aac\u660e\u3059\u308b\u3002<\/p>\n\n\n\n<h3 id=\"modifying-android\">\u30a2\u30f3\u30c9\u30ed\u30a4\u30c9\u306e\u6539\u9020<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/Hardware-Tutorial\/usage-of-connector\/enable-external-rtc\/#modifying-android\"><\/a><\/h3>\n\n\n\n<p>\u5916\u4ed8\u3051RTC HYM8563\u306f\u30b7\u30b9\u30c6\u30e0\u5185\u306b\u30ce\u30fc\u30c9\u3068\u3057\u3066\u5b58\u5728\u3059\u308b\u3002&nbsp;<code>\/dev\/rtc1<\/code>&nbsp;\u306e\u8a31\u53ef\u3092\u5f97\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002&nbsp;<code>\/dev\/rtc1<\/code><\/p>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30eb1\u306e\u4fee\u6b63&nbsp;<code>device\/rockchip\/rk356x\/mixtile_edge2\/init.mixtile_edge2.rc<\/code><\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3059\u308b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>on boot\n    chown system system \/dev\/rtc1\n    chmod 0640 \/dev\/rtc1\n<\/code><\/pre>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30eb2\u306e\u4fee\u6b63&nbsp;<code>device\/rockchip\/rk356x\/mixtile_edge2\/sepolicy\/genfs_contexts<\/code><\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3059\u308b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>genfscon sysfs \/devices\/platform\/fe5c0000.i2c\/i2c-3\/3-0051\/power\/wakeup u:object_r:sysfs_wakeup:s0\ngenfscon sysfs \/devices\/platform\/fe5c0000.i2c\/i2c-3\/3-0051\/rtc\/rtc1\/hctosys u:object_r:sysfs_hctosys:s0\n<\/code><\/pre>\n\n\n\n<p>Android\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u306b\u306f&nbsp;<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/mixtile-os\/compile-from-source-code\/#compiling-kernel\"><strong>\u30ab\u30fc\u30cd\u30eb\u306e\u30b3\u30f3\u30d1\u30a4\u30eb<\/strong><\/a>&nbsp;\u306e\u7ae0\u3067\u8a73\u3057\u304f\u8aac\u660e\u3059\u308b\u3002<\/p>\n\n\n\n<p>super.img\u3092\u713c\u304f\u306b\u306f\u3001\u4ee5\u4e0b\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002&nbsp;<a href=\"https:\/\/www.mixtile.com\/ja\/docs\/Mixtile-Edge-2-Docs\/getting-started\/update-firmware\/\"><strong>\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u306e\u66f4\u65b0<\/strong><\/a>&nbsp;\u306e\u7ae0\u3067\u8a73\u3057\u304f\u8aac\u660e\u3059\u308b\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>PMU rk809 of rk3568 provides internal RTC. After edge2 is powered off, the internal RTC cannot save the system time. In order to save the system time after power failure, edge2 provides external RTC HYM8563 and button battery base. After installing button battery, edge2 can save the system time. Introduction Edge 2 uses HYM8563 as [&#8230;]","protected":false},"author":1,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"spay_email":""},"ht-kb-category":[77],"ht-kb-tag":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Enable External RTC | Mixtile<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Enable External RTC | Mixtile\" \/>\n<meta property=\"og:description\" content=\"PMU rk809 of rk3568 provides internal RTC. After edge2 is powered off, the internal RTC cannot save the system time. In order to save the system time after power failure, edge2 provides external RTC HYM8563 and button battery base. After installing button battery, edge2 can save the system time. Introduction Edge 2 uses HYM8563 as [...]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/\" \/>\n<meta property=\"og:site_name\" content=\"Mixtile\" \/>\n<meta property=\"article:modified_time\" content=\"2023-11-22T06:48:29+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/#organization\",\"name\":\"Mixtile Limited\",\"url\":\"https:\/\/www.mixtile.com\/ja\/\",\"sameAs\":[],\"logo\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/#logo\",\"inLanguage\":\"ja\",\"url\":\"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2022\/02\/logo.svg\",\"contentUrl\":\"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2022\/02\/logo.svg\",\"caption\":\"Mixtile Limited\"},\"image\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/#logo\"}},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/#website\",\"url\":\"https:\/\/www.mixtile.com\/ja\/\",\"name\":\"Mixtile\",\"description\":\"Hardware for IoT Solutions\",\"publisher\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.mixtile.com\/ja\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"ja\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/#webpage\",\"url\":\"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/\",\"name\":\"Enable External RTC | Mixtile\",\"isPartOf\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/#website\"},\"datePublished\":\"2023-09-06T08:25:58+00:00\",\"dateModified\":\"2023-11-22T06:48:29+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.mixtile.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Enable External RTC\"}]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Enable External RTC | Mixtile","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.mixtile.com\/ja\/docs\/enable-external-rtc\/","og_locale":"ja_JP","og_type":"article","og_title":"Enable External RTC | Mixtile","og_description":"PMU rk809 of rk3568 provides internal RTC. After edge2 is powered off, the internal RTC cannot save the system time. In order to save the system time after power failure, edge2 provides external RTC HYM8563 and button battery base. After installing button battery, edge2 can save the system time. 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