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1 Introduction
COM Express™ Concept
COM Express™ is an open industry standard defined specifically for COMs (computer on modules). Its creation makes it possible to smoothly
transition from legacy interfaces to the newest technologies available today. COM Express™ modules are available in following form factors:
•
Mini 84mm x 55mm
•
Compact 95mm x 95mm
•
Basic 125mm x 95mm
•
Extended 155mm x 110mm
Table 1 COM Express™ 3.0 Pinout Types
Types Connector Rows PCIe Lanes PCI IDE SATA Ports LAN ports USB 2.0 / USB 3.0 Display Interfaces
Type 1 A-B Up to 6 - 4 1 8 / 0 VGA, LVDS
Type 2 A-B C-D Up to 22 32 bit 1 4 1 8 / 0 VGA, LVDS, PEG
Type 3 A-B C-D Up to 22 32 bit - 4 3 8 / 0 VGA,LVDS, PEG
Type 4 A-B C-D Up to 32 1 4 1 8 / 0 VGA,LVDS, PEG
Type 5 A-B C-D Up to 32 - 4 3 8 / 0 VGA,LVDS, PEG
Type 6 A-B C-D Up to 24 - 4 1 8 / 4* VGA,LVDS/eDP, PEG, 3x DDI
Type 7 A-B C-D Up to 32 - 2 5 (1x 1 G, 4x 10 G) 4 / 4* -
Type 10 A-B Up to 4 - 2 1 8 / 2* LVDS/eDP, 1xDDI
* The SuperSpeed USB ports (USB 3.0) are not in addition to the USB 2.0 ports. Up to 4 of the USB 2.0 ports can support SuperSpeed USB.
The conga-TR4 modules use the Type 6 pinout definition and comply with COM Express 3.0 specification. They are equipped with two high
performance connectors that ensure stable data throughput and support high bandwidth networking.
The COM (computer on module) integrates all the core components of a common PC and is mounted onto an application specific carrier
board. COM modules are legacy-free (no Super I/O, PS/2 keyboard and mouse) and provide most of the functional requirements for any
application.
These functions include, but are not limited to, a rich complement of contemporary high bandwidth serial interfaces such as PCI
Express, Serial ATA, USB 3.0/2.0, and 10 Gigabit Ethernet.
Carrier board designers can use as little or as many of the I/O interfaces as deemed necessary. The carrier board can therefore provide all
the interface connectors required to attach the system to the application specific peripherals. This versatility allows the designer to create a
dense and optimized package, which results in a more reliable product while simplifying system integration. Most importantly, COM Express™
modules are scalable, which means once an application has been created there is the ability to diversify the product range through the use
of different performance class or form factor size modules. Simply unplug one module and replace it with another; no redesign is necessary.