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Jumpers and Connectors
The board has a number of jumpers that allow you to con-
figure your system to suit your application. The table below
lists the function of each of the jumpers and connectors.
Connectors
Label
ATXPWR1
ATX12V1, ATX12V2
BH1
BH2
BIOS_SKT1
BMC_LAN_USB3C2
BMC_SKT1
BMC_UART1
COM1
CPUFAN0
C0_DIMM_A1,
C0_DIMM_B1,
C0_DIMM_C1,
C0_DIMM_G1,
C0_DIMM_H1,
C0_DIMM_I1
ESPI1
EX_THR1
GPIO1
JFP1
JFP1+JFP2
JFP3
LAN1, LAN2
LANLED1
M2_22110_1
M2_22110_2
PMBUS1
2 ASMB-831 Startup Manual
Function
ATX 24-pin main power connector
(for the system)
Processor power connector
(for CPU0)
For RTC battery
For optional battery kit
BIOS SPI ROM
IPMI dedicated LAN connector &
USB 3.2 port 3, 4
IPMI ROM
IPMI UART connector
Serial port: RS-232
CPU FAN connector
DDR5 288-pin slot
ESPI connector
For external thermistor cable kit
8-bit GPIO header
To support 1U chassis (Cable P/N:
1700031926-11)
Power Switch/Power Reset/Power
LED/LAN1LED/LAN2LED/HDD
LED
Power LED Behavior:
- Suspend: Fast flash (ATX/AT)
- System On: ON (ATX/AT)
- System Off: OFF (ATX/AT)
Power Switch/Reset connector
External speaker/HDD LED connec-
tor / SMBus connector
Keyboard Lock and Power LED
- Suspend: Fast flash (ATX/AT)
- System On: ON (ATX/AT)
- System Off: OFF (ATX/AT)
RJ-45 LAN connector
LAN LED extension connector
M.2 connector (SATA & PCIe x4)
M.2 connector (PCIe x4)
PMBUS connector to communi-
cate with the power supply
Jumpers and Connectors (Cont.)
SATA_CON1
SATA 0~7 via SFF8643 connector
SSATA
SATA 8 connector
PCIEX16_SLOT1
PCIe x16 slot (x16 link) (CPU)
PCIEX8_SLOT2
PCIe x8 slot (x8 link) (CPU)
PCIEX16_SLOT3
PCIe x16 slot (x16 link) (CPU)
PCIEX8_SLOT4
PCIe x8 slot (x8 link) (CPU)
PCIEX16_SLOT5
PCIe x16 slot (x16 link) (CPU)
PCIEX16_SLOT6
PCIe x16 slot (x16 link) (CPU)
PCIEX16_SLOT7
PCIe x16 slot (x16 link) (CPU)
SLOT12V1
For PCIe slot 12V input only
SMBUS1
SMBus header
SPI_CN1
Connector for BIOS update tool
SYSFAN0~SYSFAN4 System FAN connector
System Information LED Con-
SYS_LED1
nector
USB 3.2 port 1, 2; USB 3.2 port 5,
USB3A1, USB3C1,
6 (20-pin header); USB 3.2 port
USB3H1
7 (Type-A)
VGA1
VGA connector
Jumper List
Label
JCASE1
JCMOS1
JWDT1
PSON1
JCMOS1: CMOS Clear Function
Closed pins
1-2
2-3
*: Default
Keep CMOS data
Disable ME updates
Function
Chassis case open alarm
CMOS clear
Watch Dog Reset
AT(1-2)/ATX(2-3)
Result
Keep CMOS data*
Clear CMOS data
Clear CMOS data
Enable ME updates
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