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Jumpers and Connectors
Jumpers
Label Function
J1
PCI VIO select
J2
LAN3, LAN4 bypass function select (optional)
J3
LAN3, LAN4 bypass function select (optional)
J4
CMOS clear jumper
J5
Firmware Hub Lock read/write enable
Connectors
Label
Function
CN1
System fan1
CN4
Power & HDD LED connector
CN5
Digital I/O
CN6
Reset button connector
CN7
Fan fail LED
CN8
IDE1
CN9
Printer port
CN10
System fan1
CN11
Keyboard and PS2 mouse
CN12
USB
CN13
Serial port 1
CN14
FDD (Optional)
CN15
LAN4 LED
CN16
Serial port2
CN17
LAN4 RJ45
CN18
VGA
CN19
LAN3 LED
CN20
LAN3 RJ45
CN21
LAN2 LED
CN22
ATX power on/off button
CN23
ATX power suspend 5V & PS_ON signal
CN24
LAN2 RJ45
CN25
CPU fan
CN26
LAN1 RJ45
CN27
LAN1 LED
CN29
EBX power
CN30
CF
J1 PCI VIO select
pin
signal
1
+5 V
2
VIO
3
+3.3 V
Settings
1-2
PCI VIO +5 V
2-3
PCI VIO +3.3 V
PCI VIO +5 V PCI VIO +3.3 V
J2, J3 LAN 3, LAN 4 bypass function control
PINS
auto-detect* by GPIO
always enable
J2 1-2
closed
closed
open
J2 2-3
NA
†
NA
open
J3 1-2
closed
NA
open
J3 2-3
NA
closed
open
J4 CMOS clear jumper
Settings
1-2
normal
2-3
clear CMOS
normal clear CMOS
J5 BIOS Flash Read/Write select
pin
function
1-2 closed
Write enable
1-2 open
Read only
3
2
1
3
2
1
3
2
1
3
2
1
