2-20
A1SAM/A1SRM Series Motherboard User’s Manual
JPI2C1
JL1
JOH1
JF1
JPW1
JLAN2
JLAN1
JBT1
LED8
LED7
JPK1
SP1
JBAT1
JWD1
JPB1
JI2C2
JI2C1
JPG1
JPL1
JSD1
JTP
M1
JIP
MB1
JVGA1
JUIDB1
COM2
JD1
I-SA
TA1
I-SA
TA0
I-SA
TA5
I-SA
TA4
1
I-SA
TA3
I-SA
TA2
FAN3
FAN2
FAN1
CPU1 SL
O
T4 PCI-E 2.0 X4
USB6
LAN3/4 LED
LAN2/LAN4
DIMMB2
DIMM
A2
USB0/1
BUZZER
IPMI_LAN
BATTERY
DIMMB1
CPU1 SL
O
T6 PCI-E 2.0 X8
LAN1/LAN3
DIMM
A1
USB4/5
COM1
A1SAM/A1SRM Series
Rev. 1.01
USB 2/3
FPC
TRL
LED3
BIOS
SoC Processor
BMC
PHY
JBR1
JPUSB1
JSTB
Y1
PWRI2C
LED2
Fan Header
Pin Definitions
Pin# Definition
1
Ground (Black)
2
2.5A/+12V
(Red)
3
Tachometer
4
PWM_Control
Fan Headers (Fan 1 ~ Fan 3)
This motherboard has three fan headers (Fan
1~Fan 3). These fans are 4-pin fan headers. Al
-
though pins 1-3 of the fan headers are backward
compatible with the traditional 3-pin fans, we
recommend that 4-pin fans to be used to take
advantage of 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 definitions.
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 Definitions (JL1)
Pin# Definition
1
Intrusion Input
2
Ground