Technical Doc

The Qseven concept is an off-the-shelf, multi vendor, Computer-On-Module that integrates all the core components of a common PC and is mounted onto an application specific carrier board. The Qseven module provides the functional requirements for an embedded application. These functions include, but are not limited to, graphics, sound, mass storage, network and multiple USB ports. A single ruggedized MXM connector provides the carrier board interface to carry all the I/O signals to and from the Qseven module. This MXM connector is a well known and proven high speed signal interface connector that is commonly used for high speed PCI Express graphics cards in notebooks.

Technical Doc
  • History

Officially released on July 1, 2008. Since the release of specification 1.20 (September 10, 2010) Qseven modules can be indifferently based on x86 or ARM architectures. The current revision 2.00 was released on September 9, 2012.The Qseven specification is hosted by the independent Qseven consortium. It’s freely available at the consortiums website. Qseven, a computer-on-module (COM) form factor, is a small, highly integrated computer module that can be used in a design application much like an integrated circuit component.

It’s smaller than other computer-on-module standards such as COM Express, ETX or XTX and is limited to very low power consuming CPUs. Qseven modules have a standardized form factor of 70mm x 70mm or 40mm x 70mm and have specified pinouts based on the high speed MXM system connector that has a standardized pinout regardless of the vendor. Qseven uses one 230 pin MXM2 SMT edge connector to connect all power and signal lanes to the carrier board. This connector is available at different heights (5.5 mm and 7.8 mm). The maximum power consumption should be no more than 12 watt. The Qseven specification defines a rich set of legacy-free interfaces. Older interfaces like PCI, ISA, RS-232 or EIDE are not supported. As an example in the following figures you can find a pictures and related mechanical dimensions of a Q7 card:

Qseven Supported Features

System I/O Interface ARM/RISC Based Minimum Configuration X86 Based Minimum Configuration Maximum Configuration
PCI Express lanes 0 1 (x1 link) 4
Serial ATA channels 0 0 2
USB 2.0 ports 3 4 8
USB 3.0 ports 0 0 3
LVDS channels
embedded DisplayPort
Dual Channel 24bits
DisplayPort, TMDS 0 0 1
High Definition Audio / I2S 0 0 1
Ethernet 10/100 Mbit/Gigabit 0 0 1 (Gigabit Ethernet)
UART 0 0 1
Low Pin Count bus 0 0 1
Secure Digital I/O 4-bit for SD/MMC cards  0 0 1
System Management Bus  0 1 1
I ²C Bus  1 1 1
SPI Bus 0 0 1
LPC Bus 0 0 1
CAN Bus 0 0 1
Watchdog Trigger 1 1 1
Power Button 1 1 1
Power Good 1 1 1
Reset Button 1 1 1
LID Button 0 0 1
Sleep Button 0 0 1
Suspend To RAM (S3 mode) 0 0 1
Wake 0 0 1
Battery low alarm 0 0 1
Thermal control 0 0 1
FAN control 0 0 1
  • Products

Qseven modules
Qseven carrier