ADLINK MXA-312M Ultra Compact Edge AI Computer User Manual

ADLINK MXA-312M Ultra Compact Edge AI Computer User Manual

Product Introduction

Product Positioning

MXA-312M is an ultra compact high-performance edge AI computing platform that uses MediaTek Genio700/500 (MT8390/MT8370) processors, Arm architecture, and is designed for the next generation of the Internet of Things. It supports protocol conversion, dual screen display, industrial wide temperature range, and M.2 wireless module expansion.

Core functional characteristics

Processor: MTK Genio520/720, 2 x Cortex-A78+6 x Cortex-A55, maximum 2.2GHz; Mali‑G57 MC2 GPU， Built in NPU850 artificial intelligence computing power unit.

Memory storage: LPDDR5-4800, standard 8GB, expandable up to 16GB; UFS3.1 2-lane high-speed storage.

Interface resources

Network: 2 Gigabit RJ45 Ethernet;

Serial port: 2-channel isolated RS-232/RS-485;

Display: HDMI 2.0b（ 4K@60Hz ）The HDMI（ FHD@60Hz ）Dual display output;

USB: 1 x USB 3.1 Type-A, 1 x USB 2.0 Type-A;

Expansion slot: M.2 2230 E-Key (Wi Fi+Bluetooth); M. 2 3042 B-Key (USB 2.0, for 4G/LTE, requires optional AFM expansion board kit); Reserve USB 2.0, I2C, UART, GPIO, SPI for AFM expansion board use.

environmental parameters

Standard version working temperature: -20 ℃~+60 ℃; Optional external heat sink can achieve a wide temperature range of -20 ℃ to+70 ℃;

The maximum working altitude is 5000 meters, and the power supply needs to meet LPS and SELV safety circuit requirements.

Packing List

Host MXA-312M;

M. 2 fixed M3 pan head screws, 3 pieces;

DC power terminal connector;

Attention: The 12V/60W power adapter is an optional accessory and not included as standard.

Optional accessories

Accessory part number and accessory description

31-62156-0000-A0 12V/60W power adapter

91-44A03-0010 AFM Expansion Kit (RS232&RS485)

91-44A03-1010 AFM Expansion Kit (LTE Cellular)

32-60091-0000-A0 external heat sink for wide temperature range

DC power supply requirements

Input: 12VDC, 3.65A;

IEC/UL certified power supply must be used; Before connecting the power, confirm the voltage and polarity. Reversing the connection can cause permanent damage to the equipment.

Hardware Specifications

Complete hardware resource summary:

Processor subsystem: MT8371/MT8391, 8-core CPU, Mali-G57 GPU, NPU850; LPDDR5； UFS3.1。

Network: Two Gigabit Ethernet PHY channels.

Storage peripherals: SD card slot M.2 E‑Key； NOR Flash； RTC and TPM security chips.

USB: Multiple USB2.0/USB3 ports are provided for external A-type ports, M.2 E-Key, and AFM expansion boards.

Display: Two HDMI outputs, driven by DSI/eDP to HDMI chip.

Communication bus: Multi channel I2C, SPI, I2S; Multi channel UART (debugging serial port, RS232, RS485, AFM extension); CSI camera interface.

Control resources: GPIO, reset button, LED indicator light.

Mechanical Layout and Hardware Block Diagram

Functional Block Diagram

Display MTK main control chip, power supply, memory UFS、 Network port, USB, HDMI conversion chip, camera, M.2 slot, AFM expansion board, RS232/485 serial port, TPM/RTC chip complete signal link.

Dimensions (in millimeters)

Overall appearance: length 115 x width 85 x height 35. Provide top view, front view, and side view engineering drawings.

Interface layout

Front panel: PWR power light, RST reset button, WIFI indicator light; Dual port LAN1/LAN2; USB3.1、USB2.0； HDMI1、HDMI2； Two SMA antenna bases and grounding screws.

Rear panel: 12V DC power terminal; RS485 and RS232 wiring terminals; MicroSD card slot.

I/O Interface Comparison Table

Identify interface name

A PWR power LED

B RST reset button

C WIFI status LED

G/H LAN2/LAN1 Gigabit Ethernet port RJ45

I USB3.1 Type‑A

J USB2.0 Type‑A

D Dual HDMI Video Output

F/K antenna SMA interface

E grounding screw

L 12V DC power input terminal

M microSD card slot

N RS232/RS485 terminal block

Definition of Connector Pins and Jumpers

FM (AFM) expansion board 50Pin connector

Includes multiple 3.3V/5V/1.8V power supplies GND； UART（RTS/CTS/RXD/TXD）； I2C_SDA/SCL； Multi channel GPIO; SPI（MOSI/MISO/CLK/CS）； Multiple sets of USB differential signals; Module reset, WPAN reset, and WPAN status LED signal, used for external serial ports and 4G-LTE expansion boards.

DC power terminal

Pin 1: GND; Pin 2: CHGND_DCIN; Pin 3: ADAPTER-IN power input.

USB Type-A: Standard USB 2.0 and USB 3.0 signal definitions (VBUS, D -, D+, GND; ultra-high speed differential transceiver).

RS232 serial port terminals: GND, COM1_RXD, COM1_TXD.

RS485 serial port terminals: GND, COM3_TXD -, COM3_TXD+.

Debug Header: GND, UART0_TXD, UART0_RXD, used for system serial port debugging.

Safety Instructions

Operating environment: Standard -20 ℃~60 ℃, with added heat sinks up to -20~70 ℃; It is recommended to deploy in a controlled IT room and only allow licensed operations personnel to access.

Disassembling and assembling equipment must be powered off, and after maintenance is completed, all chassis covers must be restored before powering on.

Protection requirements: Keep away from liquids, high temperature and humid environments; Do not obstruct ventilation; The power supply must be grounded; Long term idle disconnection of power supply.

High temperature warning for the body: After operation, the temperature of the outer shell is high. Touch it after cooling to prevent burns.

Built in lithium battery: Replacing the wrong type of battery can cause an explosion, and waste lithium batteries can be recycled in compliance with regulations.

Fault handling: Power supply damage, water ingress, moisture damage, and drop damage must be repaired by authorized engineers, and self disassembly for repair is prohibited.

The device is not intended for ordinary users in household/public places and is only for use in industrial controlled environments.

The security chapter also provides a complete French version of security warnings.