On Sat, Sep 06, 2003 at 10:30:39AM -0500, Lars E. Olson wrote: > The title just about says it all. What's the difference between the > different versions of USB? How do I tell which version my computer > supports? Can 2.0 devices detect a 1.1 connection and scale back? > (Note: not the same question as using a 1.1 device on a 2.0 connection.)
Your friendly USB hardware makers have decided to make this even more confusing. The version numbers you mention are now known as: USB 1.0 -> USB 1.0 USB 1.1 -> USB 2 High Speed USB 2.0 -> USB 2 Full Speed USB 1.1 (USB 2 High Speed) and 2.0 (USB 2 Full Speed) actually use the exact same protocol. The only difference is that 'Full Speed' is much faster (~400 Mbps instead of ~11Mbps if memory serves). So, yes, your USB 2 Full Speed device will work fine on a USB 2 High Speed connection. In other notes, I'm using a supposed USB 2 (don't know if it's full or high speed) printer on two computers that only do USB 1.0 without a problem. -- --------------------------------+----------------------------------- Byron Clark | http://www.byronandannie.net [EMAIL PROTECTED] | --------------------------------+----------------------------------- GnuPG Fingerprint: 0365 6979 6C3E BC0C 56C0 FB7F 12B3 75DD 042B EA68
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