Usb 3 می‌آید (آمد !‌)

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USB 3 می‌آید
سرویس اخبار خارجی ایتنا - نسخه اولیه این استاندارد که در نمایشگاه IDF 2007 بنمایش گذاشته شد اطلاعات را با سرعت 4.8 گیگابیت بر ثانیه جابجا نمود که در مقایسه با سرعت 480 مگابیت بر ثانیه USB 2.0 پیشرفت خوبی بحساب می‌آید.

شرکت اینتل مجموعه‌ای از ابزارهای جدید را معرفی كرده که به سازندگان سخت‌افزار اجازه می‌دهد چیپ‌هایی مربوط به نسخه آتی USB بسازند.
مشخصات نسخه اولیه این رابط که (The Extensible Host Controller Interface (xHCL نام دارد ارتباط بین کنترلر USB و پشته نرم‌افزاری را برقرار ساخته و برنامه‌نویسان را قادر خواهد ساخت تا ضمن ایجاد ارتباط با ابزارهای USB 3 ، چیپ‌های کنترلی برای این ابزارها بسازند.

شرکت اینتل از این رابط بعنوان مجموعه‌ای از ابزارهای ساده شده برای یکپارچه‌سازی ارتباطات فوق‌سریع USB یاد می‌کند.

این شرکت در اطلاعیه‌ای آورده است: «این یک کمک کوچک برای ساخت چیپ‌های سیلیکونی است که بتوانند با استاندارد USB 3.0 کار کنند.»

«صنعت مشتاقانه منتظر معرفی استانداردی است که کارکردی هماهنگ را بین ابزارهای USB 3.0 تضمین نماید.»

شرکت اینتل امیدوار است بتواند استاندارد USB 3.0 را به استانداردی مناسب جهت ایجاد اتصال و ارتباط بین دستگاه‌های رسانه‌ای HD که نیازمند خطوط پرظرفیت می‌باشند، تبدیل کند.

نسخه اولیه این استاندارد که برای اولین بار در نمایشگاه IDF 2007 بنمایش گذاشته شد اطلاعات را با سرعتی برابر با 4.8 گیگابیت بر ثانیه جابجا نمود که در مقایسه با سرعت 480 مگابیت بر ثانیه USB 2.0 پیشرفت خوبی بحساب می‌آید.

اینتل بر روی شرکت‌های مایکروسافت، AMD ، Dell و nVidia بعنوان پشتیبانات اولیه SuperSpeed USB حساب ویژه‌ای باز نموده است.

نسخه سوم USB قرار است تا انتهای سال جاری وارد بازار شود.

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Everything You Need to Know About USB 3.0, Plus First Spliced Cable Photos


No doubt you’re familiar with the Universal Serial Bus – we ranked it as our top PC innovation of all time. But what do you know about the next version of this ubiquitous interface? USB 2.0 (otherwise known as USB Hi-Speed) boosted the original 12Mbps data rate to 480Mmb/s over eight years ago, and now USB 3.0 (dubbed USB Superspeed) is set to multiply that bandwidth tenfold. The USB Implementers Forum (led by Intel) released the USB 3.0 spec to hardware partners last week after some reported disputes with AMD and Nvidia (who, afraid Intel would have a jump start in incorporating the tech in chipsets, threatened to develop their own USB standard). But how does this affect you? We dug up some new information about USB 3.0, got our hands on the new connectors, and even took a look inside the new cables.

USB 3.0 will be backwards-compatible with USB 2.0

Like the upgrade from USB 1.1 to 2.0, the new 3.0 connectors and cables will be physically and functionally compatible with hardware from the older specs. Of course, you won’t be able to maximize your bandwidth unless you’re using a USB 3.0 cable with Superspeed devices and ports, but at least plugging a 3.0 cable into a 2.0 port won’t blow up your PC. The spec’s compatibility lies in the design of the new connectors. USB 2.0 cables worked off of four lines – a pair for in/out data transfer, one line for power, and the last for grounding. USB 3.0 adds five new lines (the cable is noticeably thicker), but the new contacts sit parallel to the old ones on a different plane, as opposed to being adjacent to them. This means you’ll be able to differentiate between 2.0 and 3.0 cables just by looking at the ends.

At first glance, the USB 3.0 connector looks just like the 2.0 design
The maximum speed of USB 3.0 is 4.8Gbps

It’s true: USB 3.0 SuperSpeed will be 10 times faster than the 480Mbps limit of the 2.0 spec. The example Intel likes to give out when talking about the new speed is that transferring a 27GB HD movie to your future media player will only take 70 seconds with USB 3.0, while it would take 15 minutes or more with 2.0. Keep in mind that you’re only going to be able to take advantage of this speed if your portable storage device can write data that quickly. Solid state devices will benefit most from the speed boost, while magnetic hard disks will be limited by their RPM and corresponding read/write speeds. Also, new Mass Storage Device drivers will have to be developed for Windows to take advantage of the spec.

The USB 3.0 A and B-side connectors
Uploads and downloads are kept on separate data lanes

Remember those five new lanes we mentioned earlier? With USB 3.0, two new lanes will be dedicated to transmit data, while another pair will handle receiving data. This not only accounts for the significant speed boost, but also allows USB 3.0 to both read and write at the same time from your portable storage device. In the old spec, the pair of lanes used for data transfer weren’t split between send and receive – they only could handle traffic in one direction. Bi-directional data transfer will be very useful for syncing up information on PDAs and storage backup.

The packed guts of a USB 3.0 cable -- note that the cable will be about as thick as a ethernet cable
USB 3.0 will charge more devices, quicker

Not only will USB 3.0 cables facilitate faster transfer speeds, but they’ll carry more power, too. The USB-IF recognizes the growing number of portable devices that charge via USB (cellphones, MP3 players, digital cameras), and have bumped the power output from about 100miliamps to 900 milliamps. That means not only will you be able to power more than 4 devices from a single hub, but the increase current will let you charge up heftier hardware as well.

USB 3.0 will be more power efficient

One of the mandates of the new spec is more efficient power-usage protocols. USB 3.0 abandons device polling in favor of a new interrupt-driven protocol, which means non-active or idle devices (which aren’t being charged by the USB port) won’t have their power drained by the host controller as it looks for active data traffic. Instead, the devices will send the host a signal to begin data transfer. This feature will also be backward compatible with USB 2.0 certified devices.

A look at the mini connector that'll connect to cell-phones and other portable devices
The spec that Intel released mid-last week is only 90% complete. Ravencraft says that they expect the spec to be finalized by Q4 of this year. Hardware partners are expected to have USB 3.0 controllers designed by mid 2009, and consumers won't see the first end products utilizing the spec until early 2010 (though a late Holiday 2009 push for new products isn't out of the question).

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در یک کلام
در حالی که هنوز بعضی از کامپیوترهای خودمون و اقوام از نسخه 1.1 یو اس بی استفاده میکنه
الان به نسخه 3 با سرعت 10 برابر نسخه 2 میشه فایل انتقال داد

مکزیمم USB2 حدود 60 مگا بایت بر ثانیه (480 مگابیت) اما واقعا 32 بیشتر من ندیدم.
اما در USB3 با سرعت 600 مگابایت بر ثانیه .

The maximum speed of USB 3.0 is 4.8Gbps

It’s true: USB 3.0 SuperSpeed will be 10 times faster than the 480Mbps limit of the 2.0 spec. The example Intel likes to give out when talking about the new speed is that transferring a 27GB HD movie to your future media player will only take 70 seconds with USB 3.0, while it would take 15 minutes or more with 2.0.

[دانه کولانه]

سازگاری usb2 و usb3 - ایا usb2 روی usb3 کار میکند ؟ آیا محصولاتی usb3 روی پورت usb2 کار میکند ؟
Do USB 3 devices work with USB 2.0 ports - and vice versa?

Planning to purchase a new scanner and external HDD soon and been wondering that if I now go with USB3 products, do they work with my current PC that has only USB 2.0 ports available?

Furthermore, will my current USB 2.0 products (mouse, another external hard drive, etc) work in future when I upgrade to a PC that has only USB 3 ports available?



USB 3.0 devices can connect to USB 2.0 port but obviously you will not get USB 3.0 speeds, youll get a msg stating to connect to a faster port just like you do when connecting a 2.0 device to a 1.1 port.

As for 2.0 USB devices on 3.0 ports, that will work as well except you will not get 3.0 speeds on 2.0 connections. The connections are the same except 3.0 connections have twice as many connectors inside the plug which is what provides the faster speeds .

بله و بله و بله و بله تنها اینکه انتظار سرعت usb3 را نداشته باشید .
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