REQ: Need help connecting front USB on M7VIG Pro MOBO


Y

young

I am building a new machine using a M7VIG Pro MOBO. The case has two
front USB's (USB2?). Anyway the MOBO manual is very sparse in info
and shows in a diagram two (JUSB2 & JUSB3) headers marked:

2 . . . . . Pin 1,2 ==> +5V
1 . . . . Pin 3,4 ===> Data(-)
Pin 5,6 ===> Data(+)
Pin 7,8 ===> Ground
Pin 9 ===> Key
Pin 10 ===> NA

The new case has two front USBs and two sets of four wires labeled:
1 2
1 VCC 2 VCC
1 D- 2 D-
1 D+ 2 D+
1 GND 2 GND

I tried the web site for the board - found nothing. Maybe I missed
it?

Anyway, can some tell me what wires to connect to what pins?

Thanks
 
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K

kony

I am building a new machine using a M7VIG Pro MOBO. The case has two
front USB's (USB2?). Anyway the MOBO manual is very sparse in info
and shows in a diagram two (JUSB2 & JUSB3) headers marked:

2 . . . . . Pin 1,2 ==> +5V
1 . . . . Pin 3,4 ===> Data(-)
Pin 5,6 ===> Data(+)
Pin 7,8 ===> Ground
Pin 9 ===> Key
Pin 10 ===> NA

The new case has two front USBs and two sets of four wires labeled:
1 2
1 VCC 2 VCC
1 D- 2 D-
1 D+ 2 D+
1 GND 2 GND

I tried the web site for the board - found nothing. Maybe I missed
it?

Anyway, can some tell me what wires to connect to what pins?

Thanks

Since your plugs don't have 5 pins just leave the motherboard's key
pin (and the empty spot? next to it) unused.

From your account it appears that the plugs are configured correctly
already. "VCC" is +5V, the first plug would go on pins 1,3,5,7, and
the other on 2,4,6,8. Just match up the end with VCC to the 5V pin
and GND to gound pin.

Then again, if i had any doubts I'd test the pin-header with a voltage
meter before attaching any USB devices, to confirm that you're
correctly interpreting which pin is VCC.


Dave
 
Y

young

The question I have now is - I have two MOBO 'headers', each laid out
as follows:

2 o o o o o o o o o o
1 o o o o o o o o

As I said before my case has two front USBs each of which has only
four wires, marked vcd. d+ d-, and gnd. I think I am clear on which
wires to take to which pins, but as I see it, each 'header' has two
rows of pins, either of which could be used. Therefore I cold connect
a vcd wire for example to pins 1 or 2, d- to pins 3 or 4, and so on.

So would it be better to use pins 1, 3, 5, & 7 or pins 2, 4, 6, 8?
Or does it make any difference? Would it be better for me to connect
my two front USBs to same 'header' or each USB to a different 'header?

I guess my confusion is over why are there is a 9-pin 'header' for
only four connectors? This may seem a dumb question, but I would
really like to know.

Thanks
 
K

kony

The question I have now is - I have two MOBO 'headers', each laid out
as follows:

2 o o o o o o o o o o
1 o o o o o o o o

As I said before my case has two front USBs each of which has only
four wires, marked vcd. d+ d-, and gnd. I think I am clear on which
wires to take to which pins, but as I see it, each 'header' has two
rows of pins, either of which could be used. Therefore I cold connect
a vcd wire for example to pins 1 or 2, d- to pins 3 or 4, and so on.

Yes, just connect all four per port to the same row.
So would it be better to use pins 1, 3, 5, & 7 or pins 2, 4, 6, 8?
Or does it make any difference? Would it be better for me to connect
my two front USBs to same 'header' or each USB to a different 'header?

It might make routing the wires easier and reduce the mess in the case
to use the same header for both front ports, but otherwise it makes no
difference. There is another issue though, if you'll be using
multiple USB devices with relatively high current demand you might
want to balance the load, put those high current devices being used
concurrently on different headers. Each header is "supposed" to be
able to provide 500mA... some can put out more but there's no
guarantee of it.

I guess my confusion is over why are there is a 9-pin 'header' for
only four connectors? This may seem a dumb question, but I would
really like to know.

Thanks

By providing 9 pins, a standard 5 x 2 connector block might be used
(which integrated both sets of wires into a single plastic block),
with one of it's "holes" plugged, to prevent it being installed
backwards.

The other prevalent pinout scheme (which you don't have to deal with)
puts the wires in reverse position on opposing rows so it wouldn't
matter which way the connector were turned, so it then wouldn't need
that extra pin and empty space as yours has.

Dave
 
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Y

young

Yes, just connect all four per port to the same row.


It might make routing the wires easier and reduce the mess in the case
to use the same header for both front ports, but otherwise it makes no
difference. There is another issue though, if you'll be using
multiple USB devices with relatively high current demand you might
want to balance the load, put those high current devices being used
concurrently on different headers. Each header is "supposed" to be
able to provide 500mA... some can put out more but there's no
guarantee of it.



By providing 9 pins, a standard 5 x 2 connector block might be used
(which integrated both sets of wires into a single plastic block),
with one of it's "holes" plugged, to prevent it being installed
backwards.

The other prevalent pinout scheme (which you don't have to deal with)
puts the wires in reverse position on opposing rows so it wouldn't
matter which way the connector were turned, so it then wouldn't need
that extra pin and empty space as yours has.

Dave
 

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