Also referred to as Hi-Speed USB, USB 2.0 is an external bus that supports data rates up to 480Mbps. USB 2.0 is an extension of USB 1.1. USB 2.0 is fully compatible with USB 1.1 and uses the same cables and connectors.
I posted this question to share the answer: if your pen drive was USB2, and you incorrectly disconnected it (withouth using the taskbar icon), you may have damaged it. Many of those damaged pen drives still works ok if they are connected with USB 1 interface. try disabling USB2 in your bios, start your operative system, and if still not detected your pen drive, try making OS detect new hardware or hardware changes (to crange usb2 drivers to usb1 drivers). This trick rescue many electrically broken pendrives.
I thInk u have 2 get a usb2 and plug in your PC or back of laptop
You can purchase an add-on card for $10-$20. Read reviews first, as many have bad reviews.
This is physically impossible as Firewire and USB connectors deliberately have completely different shapes.
I don't know what you mean by gradation, but if your pen drive was USB2, and you incorrectly disconnected it (withouth using the taskbar icon), you may have damaged it. Many of those damaged pen drives still works ok if they are connected with USB 1 interface. try disabling USB2 in your bios, start your operative system, and if still not detected your pen drive, try making OS detect new hardware or hardware changes (to crange usb2 drivers to usb1 drivers). This trick rescue many electrically broken pendrives.
If your pen drive was USB2, and you incorrectly disconnected it (withouth using the taskbar icon), you may have damaged it. Many of those damaged pen drives still works ok if they are connected with USB 1 interface. try disabling USB2 in your bios, restart your operative system, and if still not detected your pen drive, try making OS detect new hardware or hardware changes (to crange usb2 drivers to usb1 drivers). This trick rescue many electrically broken pendrives.
Generally, no; modern computers have several USB (Universal Serial Bus) ports rather than the RS-232 serial ports, Centronics parallel (printer) ports, joystick/game ports or PS2 ports of older machines. In addition, newer machines may have FireWire ports or eSATA ports. The newest computers will usually have USB3 ports rather than the older USB2; USB3 is several times faster than USB2.
Samsung's F30 series connect to a computer with a USB2 socket and can record video in the H264 format which mean they are compatible with a modern Mac and iMovie.
because stupid HP made it work only on USB1.1 ports, on a USB2 port it wont be recognized. to slow down a USB2 port to act like a USB1.1 do the following: Go to Device Manager. Find the USB section. One of the USB entries has the word "Enhanced" in it. Select that entry. Do "properties" on it. At the bottom of the Properties for the Enhanced entry, there is a "Device Usage" box. It has values like Use this device (enable) Do not use this device (disable) Change the setting to "disable".
On standards compliant USB cables you will find a string of specifications repeated at regular intervals including minimum & maximum operating temperatures & voltages as well as Consumer Standards Association (CSA) reference numbers and other information. The details can vary somewhat by manufacturerbut should nonetheless be easily recognizable. With regard to USB/USB2 the must common distinction is the inclusion of "II" or "I/II" (often plus "A" or "A/B" for A-B cables) or occasionally "USB 2.0" or "High Speed" as part of this string to mark USB2 compliant cables.Cables without such identification should generally be assumed to be only USB 1.1 compliant at best since they were generally made prior to the adoption of version 2 -- it is fatally poor business practice to manufacture a higher grade product without marking it as such.Some cables are completely unmarked or too short for the relevant specification to be fully printed. In general (and particularly for A/B and the non-standard A/A cables) these can assumed to be USB 1.1, however if the cable terminates in a USB Mini (or Micro) plug it can be assumed to be USB2 compliant since these standardized plugs post-date USB version 2's release.If the cable is hardwired to a device then you will need the look up the specs for the device itself. A more general question is: How do you determine if a USB cable or adaptor can support USB2? Mouse & keyboard adaptors/connectors don't require or use more than USB 1.1.
To import analog video into your Mac you will need an analog to digital converter (See links below). Ensure that the converter's out connector will match your Mac's input (USB2 or FireWire) .
The output voltage available at a USB port is controlled by the regulator in the computers power supply. It is fixed, you can not change or control it. The maximum current which should be drawn from a USB2 port is 500mA, from a USB3 port it can (I believe) be up to 850mA.