usb header pins question


Z

zz

a basic quickie on connecting cables to the usb front header pins on a
msi P4MAM2
usually the cases come with a cables set into a block that just plug
straight onto the header pins [no brainer] older cases have cables
labelled data -, data+, vcg, [power] and gnd or usb- usb+ vcg & gnd

the cables in this case are labelled port- port+ the other two have a
postive and negative sign respectively

the header pins on he board are vcg, data-, data+, and gnd

so which ones should i connect to the data pins??
- + cables or port- port+ cables

hopefully someone can help me be sure of this
i dont want to blow up the front usb module
thanks

zz
 
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K

kony

a basic quickie on connecting cables to the usb front header pins on a
msi P4MAM2
usually the cases come with a cables set into a block that just plug
straight onto the header pins [no brainer] older cases have cables
labelled data -, data+, vcg, [power] and gnd or usb- usb+ vcg & gnd

the cables in this case are labelled port- port+ the other two have a
postive and negative sign respectively

the header pins on he board are vcg, data-, data+, and gnd

so which ones should i connect to the data pins??
- + cables or port- port+ cables

hopefully someone can help me be sure of this
i dont want to blow up the front usb module
thanks

port - should be data -
port +, data +
vcg, power, +5V
gnd, ground -

this only describes one USB port, typically a header is for
two ports. Above 4 wires are hooked up to the same row of
pins, the 2nd row of pins being for the 2nd USB port per
header.

The remaining assumption would be that the case's connectors
are labeled correctly. It's likely they are and case could
be considered defective if they were not, but worse
manufacturering blunders could be made- if you have a
multimeter it wouldn't hurt to check it.
http://www.starmount.co.uk/usb_skta.gif
 
J

Juan Hanglow

kony said:
a basic quickie on connecting cables to the usb front header pins on a
msi P4MAM2
usually the cases come with a cables set into a block that just plug
straight onto the header pins [no brainer] older cases have cables
labelled data -, data+, vcg, [power] and gnd or usb- usb+ vcg & gnd

the cables in this case are labelled port- port+ the other two have a
postive and negative sign respectively

the header pins on he board are vcg, data-, data+, and gnd

so which ones should i connect to the data pins??
- + cables or port- port+ cables

hopefully someone can help me be sure of this
i dont want to blow up the front usb module
thanks

port - should be data -
port +, data +
vcg, power, +5V
gnd, ground -

this only describes one USB port, typically a header is for
two ports. Above 4 wires are hooked up to the same row of
pins, the 2nd row of pins being for the 2nd USB port per
header.

The remaining assumption would be that the case's connectors
are labeled correctly. It's likely they are and case could
be considered defective if they were not, but worse
manufacturering blunders could be made- if you have a
multimeter it wouldn't hurt to check it.
http://www.starmount.co.uk/usb_skta.gif

there is some question about the layout of the pins/sockets.

my mobo had the following config (male pins)

row 1, +5V
row 2, D-
row 3, D+
row 4, GND
row 5, S GND

Wishing to use both headers on my mobo, I ordered a pair of pre assembled
USB blanking plates from RS. Each was fitted with a double socket housing (2
x 5). I assumed this to be wired as my mobo but it was not. One single row
(left) was as above but the second row (right) was inverted. It was easy
enough to correct as the sockets are only held in by a plastic clip. Having
my mobo manual and the following web site made the connection simple and
safe. PS when I connected the header before reversing the sockets the comp
would not fire up.

this page is worth a visit

http://www.frontx.com/con_guide.html

dj
 
S

Stephen Howard

On Mon, 3 Oct 2005 17:32:08 +0000 (UTC), "Juan Hanglow"

there is some question about the layout of the pins/sockets.

my mobo had the following config (male pins)

row 1, +5V
row 2, D-
row 3, D+
row 4, GND
row 5, S GND

Wishing to use both headers on my mobo, I ordered a pair of pre assembled
USB blanking plates from RS. Each was fitted with a double socket housing (2
x 5). I assumed this to be wired as my mobo but it was not. One single row
(left) was as above but the second row (right) was inverted. It was easy
enough to correct as the sockets are only held in by a plastic clip. Having
my mobo manual and the following web site made the connection simple and
safe. PS when I connected the header before reversing the sockets the comp
would not fire up.

this page is worth a visit

http://www.frontx.com/con_guide.html
I have a mo'board which places the d+ on the second pin of the board
socket, and having rewired an aftermarket header to suit I then
changed mo'boards - and completely forgot to rewire the header plug. I
only remembered as my USB drive was halfway through transferring files
- and seeing as it ( and every other usb device ) worked, I have left
it as is.
In which case although the +5v and Gnd are obviously critical, it
would appear that the D+ & D- are less so.

Regards,
 
K

kony

I have a mo'board which places the d+ on the second pin of the board
socket, and having rewired an aftermarket header to suit I then
changed mo'boards - and completely forgot to rewire the header plug. I
only remembered as my USB drive was halfway through transferring files
- and seeing as it ( and every other usb device ) worked, I have left
it as is.
In which case although the +5v and Gnd are obviously critical, it
would appear that the D+ & D- are less so.

No, they are "critical". I can only presume that random
chance had made the connection still, there was more than
one path to those pins.
 
S

Stephen Howard

No, they are "critical". I can only presume that random
chance had made the connection still, there was more than
one path to those pins.

I certainly thought they ought to have been critical, and yet I have
one usb pen drive, two digital cameras, two webcams and a keyboard
that function absolutely perfectly.
I can only surmise that the pinout in the mo'board manual is
incorrect, but then it always used to work when it was wired the other
way round.

Regards,
 
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Z

zz

I certainly thought they ought to have been critical, and yet I have
one usb pen drive, two digital cameras, two webcams and a keyboard
that function absolutely perfectly.
I can only surmise that the pinout in the mo'board manual is
incorrect, but then it always used to work when it was wired the other
way round.

Regards,
thanks for your well considered posts
i can now proceed with confidence
zz
 

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