440EX/LX AT
MAINBOARD
HARDWARE SETUP
3-7
Pin assignment of ATX power connector
11 1
Pin # Signal name
Pin # Signal name
11
+ 3.3V DC
1
+ 3.3V DC
12
- 12V DC
2
+ 3.3V DC
13
Ground
3
Ground
14
PS-ON
4
+ 5V DC
15
Ground
5
Ground
16
Ground
6
+ 5V DC
17
Ground
7
Ground
18
- 5V DC
8
PW-OK
19
+ 5V DC
9
+ 5V SB
20
+ 5V DC
10
+ 12V DC
20 10
(G) CN7: Floppy Disk Control Port Connector ( using IRQ6, DMA 2):
CN4
CN 5
BAT 1
CN
1
SYS.
BI
OS
+
-
CN10
CN11
CN6
SL
O
T
1
CN
7
CN
9
CN 2
CN 16
CN
1
5
CN 1
4
CN17
CN18
RS
HL
TL
SL
PW
PL KBLOCK
SPKR
JP 7
JP 8
JP 9
JP 3
JP
4
JP
5
JP
6
JP 11
CN 8
CN
1
9
CN7 FDC Connector
