Simple USB question

oqvist

[H]F Junkie
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Dec 24, 2001
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USB cables with black connector=1.1 speeds?
USB cables with blue connector 2.0 speed?

Need to know because I have a device that could burn on a 2.0 USB port :p.
 
All USB cables are equal(quality issues aside). Color is just color.
 
The color of cable has nothing to do with the 1.0 or 2.0 whatever.. In fact the cable it's self has nothing to do with it either. What does matter is the hardware. if you have a usb 2.- port, it doesn''t matter what cable you use. (the device it's connected to might matter though..)

some one corect me if i'm wrong... It's early here, and I havn't had a cup of coffee yet.
 
n3g471v3 d3c1b3l said:
(the device it's connected to might matter though..)

I Did Not Know That.

The only difference between 1.1 and 2.0 is the data transfer rate? They both use 5vdc, right?
 
Only difference between versions is Transfer Rate. (And maybe a few very, very minor things.)

Only difference between cables is the gauge of wire used on the inside, and that is dependent on length.

Always +5 VDC, D+, D-, GND (black). (D+ D- might be swapped around, but blargh.)

You can run anything upto 5V, 500mA off a port directly off the mobo, IIRC. Hubs dependening on bus or self powered allocate current accordingly.
 
oqvist said:
USB cables with black connector=1.1 speeds?
USB cables with blue connector 2.0 speed?

Need to know because I have a device that could burn on a 2.0 USB port :p.


No device should ever burn up on a USB port. If you are drawing more than .5 amps off of VBus (5 volts supplied by USB hosts) the host port should go into an over-current state and kill power. (Note this current limit may vary from host to host)

There is no difference in power requirements or pinout of USB 1.1 or USB 2.0 cables or configuration of pins on connector. What led you to think a 2.0 host would blow up for device?
 
An ivibe ;). According to the developer he have got 10 people that got this issue. He is working on a fix though but adviced me to run through 1.1...

Thing is when I connect to the front I always get the warning that the harddrive is limited by the usb port... However when attaching to the back I seem to get full usb 2.0 speed...
 
oqvist said:
Thing is when I connect to the front I always get the warning that the harddrive is limited by the usb port... However when attaching to the back I seem to get full usb 2.0 speed...
The onboard headers those ports are connected to are probably UHCI (USB 1.1) headers, and not the faster EHCI headers.

I'm not sure if it's a "standard" but I think EHCI/USB 2.0 ports have white plastic in 'em whereas the older ones are flat black.
 
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