ADLINK AmITX-SL-G Mini ITX Motherboard Deployment and SEMA Guide

Front panel pin arrangement: 2 × 12 pins, providing PWRBTN, reset HDD LED、SUS LED、 Audio Mic/Line in.

Feature Connector: 2x14 pin, providing Case Open, I ² C, SMBus, 10 GPIO, SUS_S3/S4/S5, PWR_OK, etc.

SPI pin: Used for BIOS Flash programming.

Fan interface: CPU fan+2 x system fans (all 4-pin PWM, controlled by SEMA).

ATX power interface: proprietary 14 pin interface (with adapter cable to standard ATX 24 pin).

DB-40 debugging interface: 40 pin FPC, used in conjunction with debugging modules to implement POST code, SPI programming, LPC bus monitoring, etc.

3. Jumpers and switches

JPATX: ATX/AT mode selection (1-2=ATX, 2-3=AT).

CMOS: Clear CMOS (1-2=normal, 2-3=clear).

JPMSATA2: Mini PCIe/mSATA selection (1-2=Mini PCIe, 2-3=mSATA).

SWS1M: SER1 mode switch (RS-232/422/485).

JPS3P2: SER1 power supply selection (1-2=5V, 2-3=NC, 3-4=12V).

JPL4: LVDS backlight power supply (1-2=12V, 2-3=5V).

JPL6/JPL8: LVDS panel power supply (5V/3.3V/12V combination).

JPL5: Backlight enable polarity (1-2=Active High, 2-3=Active Low).

SW2: Dual BIOS selection and mode (select onboard BIOS/socket BIOS for position 1, select Normal/Folsafe for position 2).

JPL9/JPL10: BIOS write protect selection (BMC control/Enable).

JPL11: SATA1/2 DOM power supply selection (NA/3.3V/5V).

Jumper configuration and key installation points

1. AT/ATX mode selection (JPATX)

ATX mode (default 1-2): Supports soft switching, ACPI power management, and remote wake-up.

AT mode (2-3): Power on and start immediately, suitable for forced self start applications.

2. Power input

Using a proprietary 14 pin ATX interface (with standard ATX adapter), it provides+12V,+5V,+5Vsb,+3.3V, and PSON #/PWR_OK signals.

5VSb must be connected to support S3/S4 wake-up function.

3. Mini PCIe/mSATA selection (JPMSATA2)

If using an mSATA solid-state drive, set JPMSATA2 to 2-3 (mSATA), and this slot only supports mSATA.

If using Mini PCIe wireless/expansion card, set it to 1-2 (Mini PCIe, default).

4. SER1 mode and power supply (key)

Select RS-232 (default), RS-422, or RS-485 through SWS1M.

Select the power supply for pin 10 through JPS3P2: 1-2=5V, 2-3=NC (default), 3-4=12V.

This feature allows the board to directly supply power to external serial devices such as touch screens and scanners, simplifying wiring.

5. SATA DOM power supply (JPL11)

The pin 7 of SATA1/2 can choose to output 3.3V (1-2), 5V (2-3), or NA (default), which is used to directly power SATA DOM (Disk On Module) without the need for an additional power cord.

6. LVDS display settings (optional daughter card)

Panel voltage (JPL6/JPL8): Select 3.3V (default), 5V, or 12V according to the LCD specifications.

Backlight voltage (JPL4): 5V (default) or 12V.

Backlight Enable Polarity (JPL5): Active High (1-2) or Active Low (2-3, default).

The backlight brightness can be adjusted in BIOS or through SEMA (0~255).

Maximum load: The panel power supply does not exceed 1A (total of two circuits), and the backlight power supply does not exceed 1A per circuit.

7. Dual BIOS and write protection (SW2, JPL9/JPL10)

SW2: Position 1 ON for booting from onboard BIOS (default), OFF for booting from socket BIOS (requires physical insertion and removal of BIOS chip); Position 2 OFF is in Fail safe mode (default), and ON is in Normal BIOS mode.

JPL9 (onboard BIOS) and JPL10 (socket BIOS): 1-2=BMC control (default), 2-3=Enable write protection. After enabling write protection, there are the following restrictions:

S3/S4 sleep state is not supported;

Intel AMT functionality is unavailable;

The ME version information in the BIOS menu is displayed as "zero";

Cannot install OS in write protected state;

Unable to update MAC address;

The user is unable to refresh the BIOS.

8. Selection of radiator

The board provides multiple LGA1150 compatible heat sinks (height 30~61.4mm), suitable for 45W and 95W thermal design power consumption, depending on CPU TDP and chassis height selection

In depth analysis of SEMA onboard management function

The SEMA (Smart Embedded Management Agent) built into AmITX-SL-G enables industrial grade system management through BMC microcontrollers, without relying on an OS, providing the following key capabilities:

1. Running status statistics

Total runtime (accumulated S0 status in minutes).

This runtime (second level timing, power off reset).

Power on and startup times (including hardware/software reset and power on startup).

Startup reason: Record the last reset source (power failure, BIOS failure, watchdog reset, internal/external reset, etc.).

2. Voltage and current monitoring

BMC samples multiple voltages in real-time and provides values through SEMA API:

Monitoring object ADC channel

CPU‑Vcore 0

GFX‑Vcore 1

Vmem 3

RTC 5

3.3V 6

3.3VSB 7

5V 8

VIN(12V) 9

5VSB 11

Main current monitoring: Sample every 250ms and return the last 4 current values (unit: 8.06mA/LSB).

3. Temperature monitoring and intelligent fan

Real time reading of CPU temperature and board temperature, recording startup value, minimum value, and maximum value.

Smart Fan supports multi-level temperature control curves (4 trigger points, each point can set temperature and PWM percentage), and can set temperature sources (CPU Sensor/System Sensor) for both CPU and system fans separately.