Hi all.I'm putting a syetm together for a friend. It's now
time to plug the front USB header into the mobo, and I've hit
a snag. The motherboard has pins called Dy-, Dx-, Dy+ and Dx+,
but the cable only has D- and D+. How do I know if I should
connect to a Dy or Dx pin?
If you look in the motherboard manual, they will show you pictures
of the pinout of a 2x5 USB header. It will look like this:
"USB56 Header"
USB +5V X X USB +5V
USB_P5- X X USB_P6-
USB_P5+ X X USB_P6+
GND X X GND
X NC
The pins are effectively arranged in two columns. One
column of pins belongs to one USB pluggable port. The
other column goes to a second USB pluggable port. So in
my example here, the P5+ and P5- pins are the same as
your D+ and D- pair of signals. Or, you could use the other
column of pins, and connect P6+ and P6- to a D+ and D-
pair of signals respectively.
They arrange two USB circuits, on each 2x5 header pattern,
so there is room for two interfaces. If you only need the
services of one USB interface, you pick either one
column of pins in the above diagram, or the other column,
and use it.
Something like this might work for you:
+5VDC --> USB +5V X X USB +5V <-- +5VDC
DX- --> USB_P5- X X USB_P6- <-- DY-
DX+ --> USB_P5+ X X USB_P6+ <-- DY+
GND --> GND X X GND <-- GND
X NC
Or you can do this, and no one is the wiser:
+5VDC --> USB +5V X X USB +5V <-- +5VDC
DY- --> USB_P5- X X USB_P6- <-- DX-
DY+ --> USB_P5+ X X USB_P6+ <-- DX+
GND --> GND X X GND <-- GND
X NC
Just a matter of lining up your pluses and minuses
with their mates.
Paul
