ATX Form Factor card pinout

motherboard connector

Numbering may be reversed on some motherboards. Check the key position first.

Something Pin	Name	Direction
1	USB +5V	-?-
2	USB Port 0 -	-?-
3	USB Port 0 +	-?-
4	GND	-?-
5	n/c	-?-
6	PS/2 Mouse CLK	-?-
7	GND	-?-
8	IR Receive	-?-
9	+5 V	-?-
10	USB +5V	-?-
11	USB Port 1 -	-?-
12	USB Port 1 +	-?-
13	GND	-?-
14	n/c	-?-
15	PS/2 Mouse DTA	-?-
16	GND	-?-
17	IR Receive	-?-
18	IR Transmit	-?-

Some reports are to swap mouse CLK and mouse DATA as this: Mouse DATA is 11 (6), CLK is 12 (15).

Alternative

Pin	USB 1	USB 2	PS/2 Mouse	Infrared
1	+5V DC			" "
2		+5V DC
3	Data -
4		Data -
5	Data +
6		Data +
7	Ground
8		Ground
9			+5V DC
10
11			Mouse Clk
12			mouse Data
13				Ground
14			Ground
15				IR Hi
16				Id in
17				+5V DC
18				IR Out

Pinouts.ru > Motherboard connectors pinouts > Pinout of ATX Form Factor card and layout of connector	Document status:	correct
Source(s) of this and additional information: comp.sys.cbm General FAQ v3.1 Part 7 from Hardware Book	3 reports
Last updated at Sun Apr 16 2006. Submit additions or corrections for this document.	Is this document correct or incorrect? What is your opinion?

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