User Manual

2-20
A1SAi & A1SRi Series Motherboard User’s Manual
Battery
JD1
FAN1
FAN2
FAN3
I-SATA4
I-SATA5
J1
J3
JPI2C1
JPW1
JSD1
JTPM1
VGA
LED8
LED3
LED7
JBT1
1
JOH1
JL1
JI2C1
JI2C2
JPK1
JWD1
JPG1
JIPMB1
COM2
COM1
JF1
USB 3.0-2
LAN3/4 LED
LAN2/LAN4
LAN1/LAN3
USB2.0-0/1
USB3.0-0/1
USB 3.0-3
IPMI_LAN
PCI-E 2.0 X8
DIMMA1
DIMMA2
DIMMB2
DIMMB1
I-SATA0
A1SAi/A1SRi Series Motherboard
Rev. 1.00
FP CTRL
JPL1
BIOS
Marvell
PHY
BMC
Bar Code
JUIDB1
CPU
SP1
I-SATA2
I-SATA3
I-SATA1
LED2
Fan Header
Pin Denitions
Pin# Denition
1 Ground (Black)
2 3A/+12V (Red)
3 Tachometer
4 PWM_Control
Fan Headers (Fan 1 ~ Fan 3)
The A1SAi & A1SRi Series motherboard has
three 4-pin fan headers (Fan 1~Fan 3). Although
pins 1-3 of the fan headers are backward
compatible with the traditional 3-pin fans, we
recommend to use 4-pin fans to take advan-
tage of the fan speed control via Pulse Width
Modulation through the BMC. This allows the
fan speeds to be automatically adjusted based
on the motherboard temperature. Refer to the
table on the right for pin denitions.
A
B
A. Fan 1
B. Fan 2
C. Fan 3
D. Chassis Intrusion
C
D
Chassis Intrusion (JL1)
A Chassis Intrusion header is located at JL1 on
the motherboard. Attach the appropriate cable
from the chassis to inform you of a chassis intru-
sion when the chassis is opened.
Chassis Intrusion
Pin Denitions (JL1)
Pin# Denition
1 Intrusion Input
2 Ground