USB pins on m/b

[asm481]

I am a bit confused here. (whats new?) Trying to use the front USB ports on my new case....M/B pin diagram lists:

1 VERG_FP_USBPWRO...2 VERG_FP_USBPWRO
3 USB_FP_PO- .............4 USB_FP_PO-
5 USB_FP_PO+.............6 USB_FP_PO+
7 GROUND ................. 8 GROUND
9 KEY .......................10 USB_FP_OC0


case plugs are, two each of course;

+5V
-D
+D
ground

Do I have them listed in corresponding order? Or what equals what?

[silencio]

Yep, you've got them listed in the right order. The last two pins aren't (don't need to be) used on any of my antec cases.

[AlexK]

But I have historical A-trend ATC-6150E mainboard! With USB = 2 rows of 5 pins. <br>
How should I connect USB adapter to this? I have heard that each mainbord have different pins order! Can someone help?

[cisco2]

But I have historical A-trend ATC-6150E mainboard! With USB = 2 rows of 5 pins. <br>
How should I connect USB adapter to this? I have heard that each mainbord have different pins order! Can someone help?

Maybe someone else here can find some info on A-Trend for you. I came up pretty short. This is the only even remotely applicable A-Trend link I could find.

If you do not have a manual you may have to assume a standard pinout and x your fingers.

Per Silencio and asm481, the listed pinout seems to be standard. I have a couple Gigabyte manuals in front of me that agree, though the terminology is a bit different.

1-Power..........2-Power
3-USB Dx-.......4-USB Dy-
5-USB Dx+.......6-USB Dy+
7-Gnd.............8-GND
9-unused........10-USB Over Current

The manual specifically states to be careful with the polarity of the front panel USB connector.

I'm not familiar with the specifics of how USB (either 1.0 or 2.0) communicates. I did once by accident plug serial header into a USB socket trying to add a second serial port. when I applied power I got a big loud POP. Maybe 5 or 10 minutes later the PC decided it would power up again. I felt fortunate that it did. So your caution is well warranted.

Maybe if you really need USB on that PC you could just add a PCI USB card?

[Rellik]

Maybe someone else here can find some info on A-Trend for you. I came up pretty short. This is the only even remotely applicable A-Trend link I could find.

If you do not have a manual you may have to assume a standard pinout and x your fingers.

Per Silencio and asm481, the listed pinout seems to be standard. I have a couple Gigabyte manuals in front of me that agree, though the terminology is a bit different.

1-Power..........2-Power
3-USB Dx-.......4-USB Dy-
5-USB Dx+.......6-USB Dy+
7-Gnd.............8-GND
9-unused........10-USB Over Current

The manual specifically states to be careful with the polarity of the front panel USB connector.

I'm not familiar with the specifics of how USB (either 1.0 or 2.0) communicates. I did once by accident plug serial header into a USB socket trying to add a second serial port. when I applied power I got a big loud POP. Maybe 5 or 10 minutes later the PC decided it would power up again. I felt fortunate that it did. So your caution is well warranted.

Maybe if you really need USB on that PC you could just add a PCI USB card?

There is only 8 pins on that diagram which may indicate that the two usb connectors are reversed. (I hate it when they do that)

in most cases, the USB layout can be one of two choices:


This style was created so the connector could not be reversed, because the two connectors are opposite of each other:
5V.......G
-D......+D
+D......-D
.G......5V

This Connector is keyed so it too, could not be reversed; assuming the last pin has a filler so the connector can only be inserted one way.

5V......5V
-D......-D
+D......+D
.G.......G
NC......KEY


5V - 5 Volt power supply that powers USB devices
-D - data communication
+D - data communication
.G - Ground, needed to complete the 5V powered connection
NC - No connection
KEY - Intended to prevent reversal of the connector

there may be a third that lacks the 5th pins but is like the second layout.


If you are good with a multimeter, you could test the leads for the +5 volt source, (taking off an old pc speaker connector would work) All you would need to do is touch the black lead to a metal part of the case (the ground) and test the first and fourth pins, but you have to be very careful not to short it with any other pins, or anything else, which would likely fry the USB port or worse.

But before anybody does something like that, PLEASE find the manual or any information that helps identify what the USB layout is so you don't risk frying anything on the MoBo.