{"id":789,"date":"2020-10-28T16:39:50","date_gmt":"2020-10-28T11:09:50","guid":{"rendered":"https:\/\/iete.spit.ac.in\/?p=789"},"modified":"2024-08-29T22:34:03","modified_gmt":"2024-08-29T17:04:03","slug":"understanding-ddr","status":"publish","type":"post","link":"https:\/\/iete.spit.ac.in\/?p=789","title":{"rendered":"Understanding DDR"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"789\" class=\"elementor elementor-789\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ad545f4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ad545f4\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-49b34c3\" data-id=\"49b34c3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-390631b elementor-widget elementor-widget-text-editor\" data-id=\"390631b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t\t<h3>1. DDR stands for &#8220;Double Data Rate&#8221;. Now before we jump to DDR, we should know few terms related to RAM in order to understand DDR.<br \/>2. The basic function of RAM is to store data for a short term and transfer it to the CPU to process that data. How fast it transfers the data to other components is called its Transfer Rate (unit MT\/S). 1 MT\/s = (Mega transfers per second) = 10^6 Transfers per second.<br \/>3. BUS WIDTH This transfer of data takes place through the memory bus connecting the RAM to the CPU. This bus has a certain Bus Width which is number of bits the bus can send to the CPU at the same time.<br \/>4. Now Double Data Rate(DDR) refers to the transfer of double amount of data through the memory bus per second. This is accomplished by transferring data on both the rising and falling edges of the clock signal instead of transferring just one time(SDR).<br \/>5. BUS CLOCK A bus cycle occurs every time data is sent from RAM to CPU. Bus Clock refers to the number of such cycles taking place<br \/>per second(unit MHz).<br \/>6. For example, A DDR4-2400 SDRAM is called so because it&#8217;s transfer rate is 2400 MT\/s. Hence It&#8217;s real Bus clock would be half of that ie., 1200 MHz.(Although they are marketed as 2400 MHz)<br \/>7. By using both edges of the clock, the data signals operate with the same frequency(bus clock), but doubling the data transfer rate.<br \/>(Transfer rate = 2 * bus clock).<\/h3>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>1. DDR stands for &#8220;Double Data Rate&#8221;. Now before we jump to DDR, we should know few terms related to RAM in order to understand DDR.2. The basic function of RAM is to store data for a short term and transfer it to the CPU to process that data. How fast it transfers the data &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/iete.spit.ac.in\/?p=789\"> <span class=\"screen-reader-text\">Understanding DDR<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":790,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[11],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Understanding DDR | IETE SPIT<\/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:\/\/iete.spit.ac.in\/?p=789\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Understanding DDR | IETE SPIT\" \/>\n<meta property=\"og:description\" content=\"1. DDR stands for &#8220;Double Data Rate&#8221;. Now before we jump to DDR, we should know few terms related to RAM in order to understand DDR.2. The basic function of RAM is to store data for a short term and transfer it to the CPU to process that data. 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