** Reply to message from Martin Marques <[EMAIL PROTECTED]> on Fri, 04 Jul 2003 09:21:00 -0300
> On Vie 04 Jul 2003 09:04, Cannon, Andrew wrote: > > USB 1.1 has a maximum data transfer rate of 12Mb per sec. > > USB 2.0 has a maximum data transfer rate of 480Mb per second. > > > > They are hardware ports on your pc. USB 2.0 is backwards compatible > > with USB1.1, but if your device needs USB 2.0, it probably won't work. > > > > Also, software is an issue. > > > > So it is hardware and software dependant. > > Would this mean I have a USB 1.0 compatible port on my Linux Box? > > # cat /proc/bus/usb/devices > T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 > B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 > D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=0000 ProdID=0000 Rev= 0.00 > S: Product=USB UHCI Root Hub > S: SerialNumber=cc00 > C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms > T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 > B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 > D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=0000 ProdID=0000 Rev= 0.00 > S: Product=USB UHCI Root Hub > S: SerialNumber=d000 > C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms That is USB 1.1 which uses the uhci driver. USB 2 uses the ehci driver. jb -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://www.redhat.com/mailman/listinfo/redhat-list
