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Product basic positioning and core highlights
1. Product form
Standard PC/104 V2.6 specification single board, size 90mm × 96mm, compact stacked industrial motherboard, available in two temperature models: standard version (0-60 ℃) and ETT ultra wide temperature reinforced version (-40 ℃~+85 ℃).
2. Overview of Core Features
Processor: Single core Intel Atom E3815 SoC, low-power 5W;
Memory: up to 4GB DDR3L low-voltage memory;
Dual display output: VGA+single/dual channel 18/24bit LVDS;
Network: Dual Gigabit Intel i210 Ethernet ports;
Storage: 1 channel SATA3 (multiplexed with mSATA, optional dual SATA to cancel mSATA);
Peripherals: 3 USB 2.0 channels, 8 GPIO channels, 4 serial ports (RS232/422 adaptive);
Reinforcement characteristics: wide temperature range -40~+85 ℃, meeting military grade vibration and impact standards, supporting three proof coating;
Intelligent management: Integrated SEMA embedded management controller, realizing voltage and current monitoring, watchdog, dual BIOS, power timing, fan control, etc.
Hardware core system specifications
2.1 CPU and computing power
Model: Intel Atom E3815 Single Core SoC, with a main frequency of 1.46GHz, power consumption of 5W, and no turbo frequency;
Instruction set: Supports Intel 64, IA32, VT-x virtualization SSE4.1/4.2、 Hardware random number DRNG;
Cache: L1 instruction cache 32KB, L1 write back data cache 24KB;
Graphics kernel: 7th generation Intel graphics display, 4 execution units, supports hardware 3D acceleration DirectX11、OpenGL 3.2; Built in H.264/PEG2/VC1 hard decoding and H.264 hard encoding.
2. Memory and BIOS
Memory: DDR3L SO-DIMM slot, up to 4GB, supports 1066/1333MHz low-voltage memory;
BIOS:8MB SPI AMI EFI BIOS, Equipped with CMOS backup, dual BIOS fail safe mechanism, managed by SEMA controller.
2. Expand the bus
PC/104 ISA expansion bus, supporting traditional industrial ISA peripheral stacking;
PCIe bus leads out network ports, mSATA/mPCIe, USB and other peripherals.
2. SEMA onboard management controller (core industrial control management function)
Integrated BMC function, supporting a full set of embedded operations and maintenance:
Hardware monitoring: voltage, current, temperature acquisition;
Power management: power on timing control, deep S5 power-saving mode;
Faults and logs: equipment history, records of fault evidence information;
Peripheral control: LCD panel backlight, I2C bus GPIO、 Fan speed regulation;
Reliability: Hardware watchdog, dual BIOS anti boot failure, user-defined Flash storage;
Debugging: Equipped with a 40Pin DB40 debugging module, output POST code, BIOS burning, and hardware testing points.
Audio and video display system
VGA: Standard analog VGA output;
LVDS: Convert eDP signals through PTN3460 chip, support single/dual channel 18/24 bit LCD screen, independent backlight inverter control;
Audio: Intel HD Audio on-chip controller+ALC888 audio codec, supporting HD audio output.

Complete list of I/O interfaces
Ethernet: 2 Intel i210 10/100/1000M Gigabit Ethernet ports, supporting Wake on LAN (WOL S3/S4/S5);
Serial COM: 4-channel RS232/422 adaptive; The first two channels have complete handshake signals, while the last two channels only have TX/RX/CTS/RTS signals;
USB 2.0: 3 channels, with 1 channel reusing mSATA slot;
Storage interface
Foundation: 1 x SATA 3Gb/s, multiplexed with mSATA hardware;
Optional configuration: Cancel mSATA and switch to 2-channel independent SATA;
MSATA/mPCIe 2-in-1 slot, Micro SD card holder;
GPIO: 8-channel universal digital input/output;
System panel interface: power on/off, indicator lights, and other chassis panel signals;
Debugging interface: 40Pin multifunctional flat cable debugging head.
Power Supply and Power Management
Power supply standard: ATX 5V/5Vsb or AT 5V input;
The ACPI 5.0 standard supports energy-saving states for C1 to C6 processors and sleep for S0/S3/S4/S5 systems;
Wake up function: USB wake-up (S3/S4), Ethernet wake-up (S3/S4/S5);
ECO Deep S5 ultra-low power saving mode.
Operating system support
Standard systems: Windows 7/8 32/64 bit, Linux 32/64 bit;
Embedded customized system (with BSP board level support package): WES7/8, WEC7, Linux, QNX, VxWorks.
Mechanical, Environmental, and Reliability (Reinforced Core Parameters)
Size: 90mm × 96mm, standard PC/104 V2.6 appearance;
Operating Temperature
Standard version: 0 ℃~+60 ℃;
ETT Ultra Durable Edition: -40 ℃~+85 ℃ (after temperature screening test);
Humidity: Working at 5-90% RH without condensation; Equipped with a three proof coating, it can withstand 5~95% RH and store up to 95% RH;
Vibration and shock: comply with IEC 60068 and MIL-STD-202F military standards;
Stress testing: Complete HALT accelerated life testing (temperature variation, vibration, cold and hot shock composite testing).
Hardware functional block diagram logic
The core Intel Bay Trail-I E3815 SoC serves as the main controller and distributes all peripherals through PCIe/LPC/I2C buses;
Display pathway: eDP signal is converted to LVDS drive LCD screen through PTN3460, with independent backlight control; Simultaneously output VGA analog signal;
Storage path: SoC leads out SATA and is hardware multiplexed with mSATA/mPCIe slots; Equipped with additional Micro SD card storage;
Peripheral bus:
PCIe: Dual Gigabit Ethernet ports, PC/104 expansion bridge;
LPC: NCT5104D serial chip, ISA extension, GPIO extension;
I2C: SEMA management chip, temperature sensor LM73, power monitoring;
Management link: SEMA/BMC chip connects dual BIOS, debugging interface, power supply, fan, backlight to achieve intelligent monitoring and fault protection of the whole machine.
Order model and matching accessories
1. Motherboard model
CM1-BT1-E3815: Standard version, 0~60 ℃, standard heat sink;
CM1-BT1-E3815/ETT: Ultra wide temperature reinforced version, -40~+85 ℃, screened and tested.
2. Supporting options
CMx-BTx-X-10: complete machine matching cable kit;
CMx-BTx-TM-10: Passive low profile heat sink;
CMx-BTx-TM-20: Active low profile heat sink with fan;
Memory: 2GB/4GB certified DDR3L SO-DIMM, other capacities can be customized as needed.
3. Key points for comparing specifications of CMx BTx in the same series
The document is accompanied by a comparison table of multiple CPU configurations in the same series. CM1-BT1 is a single core E3815 basic model:
Unified standard configuration: VGA, LVDS, 8-channel GPIO, HD Audio, 3-channel USB2.0;
Differentiation: Multi core models (E3825/E3845) support dual SATA and have stronger 4-core performance; The low-end version has reduced network ports, serial ports, and storage slots.

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