quick USB 2 question

[Lucky]

does using a USB1 device on a USB2 chain drag the USB2 devices down to USB1 speeds?

 

[Deeko]

To the best of my knowledge, no.

 

[ai42]

No, they are two diffrent standards. USB 2.0 is backwards compatable with USB 1.1, however they are diffrent standards. Therefore in order for a USB 2.0 device to work it has to use the 2.0 standard. And if you have have 1.1 device it has to use a diffrent standard. Since most USB 2.0 devices are not 1.1 compatable I don't think they would slow it down as they are seperate standards.

 

[Lucky]

just wanted confirmation....

 

[SocrPlyr]

i dissagree with what has been said, it will drop the whole hub down to usb 1.1... or that is what i heard...

Josh

 

[vetteguy]

Originally posted by: ai42
No, they are two diffrent standards. USB 2.0 is backwards compatable with USB 1.1, however they are diffrent standards. Therefore in order for a USB 2.0 device to work it has to use the 2.0 standard. And if you have have 1.1 device it has to use a diffrent standard. Since most USB 2.0 devices are not 1.1 compatable I don't think they would slow it down as they are seperate standards.

Your statement is a little confusing...you say that 2.0 is backwards compatible with 1.1, but then you go on to say that 2.0 is not 1.1 compatible. I think you may want to make that a little clearer to avoid confusion. FWIW, 2.0 devices ARE 1.1 compatible, they will simply run at 1.1 speeds. As far as having both on the same hub, I'm afraid I don't know the answer to that one.

 

[Pariah]

If you have a 1.1 hub, everything drops down. If you have a 2.0 hub everything runs at its rated speed.

 

[SexyK]

Originally posted by: Pariah
If you have a 1.1 hub, everything drops down. If you have a 2.0 hub everything runs at its rated speed.

This is exactly right.

Kramer

 

[Mday]

as far as i know, having a 1.1 device does not interfere with the other devices' speed, except for the bandwidth that 1.1 device takes up.

if it is a separate pci card, it is most likely based on the NEC chip which has 3 usb controllers in it, two usb 1.1 and one usb 2.0, so it doesnt matter. the card will auto-negotiate which controller drives the device =)

anyhoo... hey Lucky, ltns...