Firewire IEEE 1394 Connector and Specification

[brianafischer]

I purchased the Adp-1394-Female from Directron here

Where can I find a reference to match the pins to my motherboard? I could do this with a multimeter I guess. I have a Gigabyte K8NS Pro and the following information is in the manual:
F1_1394 / F2_1394 (Front IEEE1394 Connector)
Be careful with the polarity of the IEEE1394 connector. Check the pin assignment carefully while you connect the IEEE1394 cable, incorrect connection between the cable and connector will make the device unable to work or even damage it.

F1_1394
Pin No. Definition
1 Power
2 Power
3 TPA0+
4 TPA0-
5 GND
6 GND
7 TPB0+
8 TPB0-
9 Power
10 Power
11 TPA1+
12 TPA1-
13 GND
14 No Pin
15 TPB1+
16 TPB1-

F2_1394
Pin No. Definition
1 TPA2+
2 TPA2-
3 GND
4 GND
5 TPB2+
6 TPB2-
7 No Pin
8 Power
9 Power
10 GND


I see a few discrepancies between the pin counts. It looks like F1 supports two firewire ports and F2 supports one. Assuming 3 ports, each has the following in common:
2x power
1 TPAn+, TPAn-, TPBn+, TPBn-

Here is the standard connector I got from http://www.hardwarebook.net/connector/bus/ieee1394.html
6 PIN IEEE1394 (with Power)
Pin Name Description
1 Power Unregulated DC; 30 V no load
2 Ground Ground return for power and inner cable shield
3 TPB- Twisted-pair B, differential signals
4 TPB+ Twisted-pair B, differential signals
5 TPA- Twisted-pair A, differential signals
6 TPA+ Twisted-pair A, differential signals
Shell Outer cable shield


The problem I have is that there are not a consistent number of GND connections, but I see that F1_1394 and F2_1394 both have 3 GND connections.

Question 1: why are there 2 power connections/port and where do these connect to on the 6-pin port?
Question 2: where do the GND connections go?

Thanks,
Brian

 

[bendixG15]

Sticky gives this reply...........
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