Contents
1
Introduction ............................................................................. 12
1.1
COM Express
®
Concept........................................................... 12
1.2
conga-TEVAL3/COMe 3.1 ...................................................... 12
1.3
Order Number ......................................................................... 13
2
Connector Layout .................................................................... 14
3
Specifications ........................................................................... 15
3.1
Feature List .............................................................................. 15
3.2
Mechanical Dimensions ........................................................... 16
3.3
Environmental Specifications ................................................... 16
4
Connectors and Features ......................................................... 17
4.1
COM Express A - B Connector ................................................ 17
4.2
COM Express C - D Connector ................................................ 19
4.3
Power Supply Connector ......................................................... 21
4.3.1
ATX Power Connectors ............................................................ 22
4.3.2
PWR_OK Signal ........................................................................ 25
4.3.3
Power Control .......................................................................... 26
4.3.4
Module Type Detection ........................................................... 27
4.4
CMOS Battery Holder ............................................................. 27
4.5
PCIe Connectors ...................................................................... 28
4.5.1
PEG x16 Slot ............................................................................ 29
4.5.2
PCIe x4 Slot.............................................................................. 29
4.5.3
PCIe x1 Slot.............................................................................. 29
4.5.4
M.2 Key B................................................................................. 30
4.5.5
M.2 Key E ................................................................................. 31
4.6
SD Card Slot ............................................................................ 32
4.7
Display Interfaces ..................................................................... 33
4.7.1
VGA.......................................................................................... 33
4.7.2
DP++ ....................................................................................... 33
4.7.3
LVDS/eDP ................................................................................. 33
4.7.3.1
eDP .......................................................................................... 34
4.7.3.2
LVDS ........................................................................................ 35
Copyright © 2025 congatec GmbH
4.7.3.3
LVDS Panel and Backlight Power Supply ................................. 36
4.7.3.4
Flat Panel and Backlight Voltage Selection ............................. 36
4.7.3.5
Flat Panel and Backlight Power Supply Connection ................ 37
4.7.3.6
Flat Panel Configuration Data .................................................. 38
4.8
Universal Serial Bus (USB) ........................................................ 38
4.8.1
USB4 Type-C ............................................................................ 39
4.8.2
Dual Stacked USB 3.1 Type-A ................................................. 40
4.8.3
USB Type-B (Client Mode) ....................................................... 40
4.8.4
SATA/SATADOM ...................................................................... 41
4.8.5
Disk Drive Power Connector .................................................... 42
4.8.6
SATA Power ............................................................................. 42
4.9
Gigabit Ethernet (GbE) ............................................................ 43
4.10
Audio Interfaces ....................................................................... 44
4.10.1
MIC-In ...................................................................................... 45
4.10.2
Line-Out ................................................................................... 45
4.10.3
Optical S/PDIF-Out .................................................................. 45
4.10.4
HDA/SoundWire Adapter/Debug Header ............................... 46
4.11
SMBus ...................................................................................... 47
4.12
I
2
C Bus ...................................................................................... 47
4.13
SPI Bus (BIOS) .......................................................................... 47
4.14
LPC/eSPI .................................................................................. 48
4.15
LPC/eSPI Header ..................................................................... 49
4.16
Serial Ports (COM Ports) .......................................................... 50
4.16.1
Super I/O COM Port 0 Header ................................................ 50
4.16.2
Super I/O COM Port 1 Header ................................................ 51
4.16.3
Module Serial Port 0 ................................................................ 52
4.16.4
Module Serial Port 1 / CAN Bus .............................................. 52
4.17
System Fan Header .................................................................. 54
4.18
CPU Fan Header ...................................................................... 55
4.19
Smart Battery Management Header ........................................ 56
4.20
Debug Pin Header ................................................................... 57
4.21
Internal Use Only ..................................................................... 57
4.22
Feature Connector ................................................................... 58
5
Additional Features .................................................................. 59
TEVA31_m001
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