{"id":8363,"date":"2017-09-04T09:12:02","date_gmt":"2017-09-04T08:12:02","guid":{"rendered":"https:\/\/blogs.mentor.com\/colinwalls\/?p=8363"},"modified":"2017-09-04T09:12:02","modified_gmt":"2017-09-04T08:12:02","slug":"usb-3-2-for-embedded-systems","status":"publish","type":"post","link":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/2017\/09\/04\/usb-3-2-for-embedded-systems\/","title":{"rendered":"USB 3.2 for embedded systems"},"content":{"rendered":"<p>I have always found USB a fascinating technology. It is a wonderful example of how something can have great complexity inside, which is used to render the thing very easy to use. I have written and spoken about USB many times over the years &#8211; <a href=\"https:\/\/www.mentor.com\/embedded-software\/blog\/post\/usb-3-1-my-wishes-granted-the-type-c-connector--3120c18c-aeb2-42f8-a1c6-4e7bb9ed3120\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a>, for example. So, I was quite interested when I saw that USB 3.2 was coming along \u2026<!--more--><\/p>\n<p>When USB first appeared, back in the 1990s, it was very exciting. At a stroke, it made the lives of most computer users a bit easier. Installing new peripherals became a true plug \u2019n\u2019 play experience. The data transfer speeds were modest, but it was a start. In 2000 USB 2.0 came along. This offered a significant improvement in data transfer rates [to 480Mbps], which was very welcome. Eight years later, USB 3.0 introduced a radical architectural change to USB to provide much better speeds again [5Gbps], while maintaining quite good backwards compatibility.<\/p>\n<p>When USB 3.1 was announced not so long ago, there was another modest speed increase [to 10Gbps] and a very significant increase in the power delivery capacity of USB. At the same time, the small, reversible [yes!] Type-C connector was introduced. This paved the way to the use of USB as a power supply for laptops etc.<\/p>\n<p>Expectations for USB 3.2 were not great, as it is only a \u201c.1\u201d update to the spec. And it is fair to say that the enhancements are incremental. When USB 3.0 was introduced, it added 4 extra data wires to the 2 that were used previously. These 4 wires facilitated simultaneous bi-directional data transfer at \u201cSuperSpeed\u201d. USB 3.1 increased this speed a little [10Gbps]. USB 3.2 provides the option to use the two channels in parallel in the same direction, thus effectively doubling the speed again [to 20Gbps].<\/p>\n<p><a href=\"http:\/\/www.linkedin.com\/in\/colinwalls\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-6579\" src=\"http:\/\/s3-blogs.mentor.com\/colinwalls\/files\/2014\/01\/linkedin.png\" alt=\"\" width=\"40\" height=\"40\" \/><\/a><a href=\"https:\/\/twitter.com\/colin_walls\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-6583\" src=\"http:\/\/s3-blogs.mentor.com\/colinwalls\/files\/2014\/01\/twitter.png\" alt=\"\" width=\"40\" height=\"40\" \/><\/a><a href=\"https:\/\/www.facebook.com\/colinwalls.author\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-6591\" src=\"http:\/\/s3-blogs.mentor.com\/colinwalls\/files\/2014\/01\/facebook.png\" alt=\"\" width=\"40\" height=\"40\" \/><\/a><a href=\"https:\/\/plus.google.com\/116301748426290440139\/posts?hl=en%3Fhl=en\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-6587\" src=\"http:\/\/s3-blogs.mentor.com\/colinwalls\/files\/2014\/01\/google.png\" alt=\"\" width=\"40\" height=\"40\" \/><\/a><a href=\"http:\/\/www.slideshare.net\/ColinWalls\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-6595\" src=\"http:\/\/s3-blogs.mentor.com\/colinwalls\/files\/2014\/01\/slideshare.jpg\" alt=\"\" width=\"41\" height=\"41\" \/><\/a><a href=\"http:\/\/blogs.mentor.com\/colinwalls\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-6599\" src=\"http:\/\/s3-blogs.mentor.com\/colinwalls\/files\/2014\/01\/wordpress.jpg\" alt=\"\" width=\"44\" height=\"44\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have always found USB a fascinating technology. It is a wonderful example of how something can have great complexity&#8230;<\/p>\n","protected":false},"author":71677,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spanish_translation":"","french_translation":"","german_translation":"","italian_translation":"","polish_translation":"","japanese_translation":"","chinese_translation":"","footnotes":""},"categories":[1],"tags":[300,326,669],"industry":[],"product":[],"coauthors":[],"class_list":["post-8363","post","type-post","status-publish","format-standard","hentry","category-news","tag-embedded-software","tag-usb","tag-usb-3-2"],"_links":{"self":[{"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/posts\/8363","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/users\/71677"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/comments?post=8363"}],"version-history":[{"count":0,"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/posts\/8363\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/media?parent=8363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/categories?post=8363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/tags?post=8363"},{"taxonomy":"industry","embeddable":true,"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/industry?post=8363"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/product?post=8363"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/blogs.stage.sw.siemens.com\/embedded-software\/wp-json\/wp\/v2\/coauthors?post=8363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}