Picture: CQ7-A42

SECOCQ7-3.5 is a cross-platform carrier board for Qseven ® rel. 2.0 compliant modules, in 3.5” mechanical Form Factor. It is specifically designed to support all features introduced with release 2.0 of the specifications, including those introduced with the Errata to rel. 2.0 published by SGET consortium.

All the features on the SECOCQ7-3.5 board are implemented according to the Qseven ® standard bus interface, thus the board is fully Qseven ® Rel. 2.0 compliant and compatible with Qseven ® Spec. 2.0 modules.The list of features that are effectively available depends on the configuration of the carrier board and of the Qseven ® module used.

SECOCQ7-3.5 board is specially designed for being both an advanced development board, for skilled users who want to design their own carrier boards, and a good solution for mass production, for customers whose requirements are satisfied by this compact and versatile Carrier Board. All the components mounted on-board are certified for industrial temperature range.

SECOCQ7-3.5 is also available as a part of Seco's Qseven® Cross Platform Starter Kit 2.0.

This section gives an overview of the technical specification and connector placements of the SECOCQ7-3.5. Please refer to the complete manual of SECOCQ7- 3.5 Carrier Board for Qseven ® Rel. 2.0 Compliant Modules on 3.5” form factor at seco.com for in-depth technical details.

Technical specifications

Supported Modules

  • Qseven ® Rel. 2.0 compliant modules

Mass Storage interfaces

  • 1 x S-ATA connector with HDD Power connector
  • 1 x mSATA Slot
  • microSD Slot on combo microSD + SIM connector

Video Interfaces

  • LVDS Dual Channel 24-bit + backlight connectors or 2 x eDP connectors
  • Multimode Display Port or HDMI Connector


  • Audio interface on internal pin header


  • 1 x USB3.0 Host port on type-A socket
  • 2 x USB2.0 Host ports on double Type-A sockets
  • 2 x USB2.0 Host ports on internal pin header
  • 1 x USB 2.0 OTG port on micro-AB socket (USB port shared with miniPCI-e slot)
  • Optional Debug USB port on mini-B socket

PCI Express

  • miniPCI-e slot Full/Half Size, combined with SIM card slot


  • Up to 2 x Gigabit Ethernet connections (the second one needs a second PCI-e lane coming from the Qseven ® module)

Serial Ports

  • 4-wires RS-232/RS-422/RS-485 configurable serial port on DB9 male connector
  • Optional 2 x RS-232 Full-modem serial ports on internal header (needs LPC interface from Qseven ® module)
  • CAN interface on PCB terminal block

Other Interfaces

  • SPI internal pin header
  • LPC Bus internal pin header
  • SM Bus / I2C GPIO expander, makes available 16 x GPIOs on internal pin header Front Panel Header
  • 1 x 28 pin connector for additional features (I2C, ACPI signals, SM Bus, WatchDog, Thermal Management)
  • +12V Tachometric FAN connector

Debug Interfaces

  • Optional Debug USB port on miniB socket
  • Optional MFG connector for JTAG programming of Qseven ® module

Coin cell battery Holder for CMOS and RTC

Power supply voltage

  • +12V DC Mini-fit Standard ATX power connector

Operating temperature

  • -40°C ÷ +85°C (industrial temperature range)


  • 146 x 102 mm (5.75 ” x 4.02 ” )

NB: Temperature ranges indicated mean that all components available on-board are certified for working with a Tcase included in these temperature ranges.This means that it is customer ’ s responsibility to ensure that all components ’Tcases remain in the range above indicated.

Connector's placement

On SECOCQ7-3.5 carrier board, there are several connectors. Standard connectors are placed on the same side of PCB, so that it is possible to place them on a panel of an eventual enclosure.

NB: Please be aware that, depending on the configuration purchased, the appearance of the board could be different from the following pictures.

Top side of SECOCQ7-3.5.png
Picture:Top side of SECOCQ7 -3.5
Bottom side of SECOCQ7-3.5.png
Picture:Bottom side of SECOCQ7 -3.5

How to connect debug serial port

Debug UART signals (available on MFG_NC1 and MFG_NC2 pins of Qseven ® card edge connector), can be routed to a standard connector or to an USB-to-UART bridge, which will allow the implementation of a more useful debug USB port. Selection is made using jumper JP1.

JP1 position MFG_NC1 and MFG_NC2
Not Inserted routed to Manufacturer connector CN2
Inserted Debug USB port CN27

Please be aware that Debug UART, when routed to this connector (on pins dedicated to signals MFG_NC1 and MFG_NC2) will be available at TTL level, i.e. it cannot be used for a direct connection to a common RS-232 serial port (like those available on PCs).

The second optional connector, CN27, is a standard mini-B USB receptacle, which will give access to the debug USB port. This is obtained by converting the debug UART signals to USB, using a Silicon Labs ® CP2104 USB-to-UART bridge.

For this purpose, it is necessary that debug UART signals are routed to the bridge, by using the jumper JP1, as specified in the table above.


Note: You need to have a USB-Mini to USB-B cable for connecting debugger port CN27 to Host PC ,To setup the terminal console application refer the link Serial Console Setup


Please refer the link for accessories support for Q7-928 ,ΜQ7-962, ΜQ7-A75-J- CQ7-A42-Accessories

Jumpers Description

It has some specific Jumper settings to access. The user can customize to access the carrier board specification for your functionality.It comes with 9 jumper's settings in different activities.

The Jumpers Descriptions are below,

JP1 Jumper is used for either to select & access the CN27 Debugger or CN2 JTAG connector.

  • When you are plugged the JP1 Jumper , It's function to access as CN27 Debugger or the default mode is to be the JTAG on CN2 ( Jumper not be plugged).

JP2 Jumper is used for either to select & access USB port#1 routing (OTG connector or miniPCI-e slot).

  • When you are plugged the JP2 Jumper , It's function to access the USB P1 on OTG connector or the default mode is to be USB1 on miniPCI-e (Jumper not be plugged).

JP3 Jumper is used to selecting for Backlight Voltage.

  • Similarly, backlight software-driven voltage, signal SW_BACK_FUSE, can be regulated to be connected to +12V_A or +5V_A.
  • It's 3 pin Jumper , When you are plugged JP3 on 1 & 2 should be +12V_A , If JP3 plugged on 2 & 3 should be regulated on +5V_A.

JP4 Jumper is used to selecting for LCD Voltage.

  • LCD software-driven voltage, i.e. signal SW_VDD_FUSE, can also be regulated to be connected to +5V_A or +3.3V_A.
  • It's 3 pin Jumper , When you are plugged JP4 on 1 & 2 pin should be +5V_A , If JP4 plugged on 3 & 4 should be regulated on +3.3V_A.

Note : Jumpers JP3 and JP4 are always present, independently by the configuration of the board purchased (with LVDS or with eDP connectors).

JP5 Jumper is used for selecting Boot_Alternate# option.

  • which allows to select different booting option (which depend on the Qseven® module installed).
  • Normally when you are boot the board use the default mode (Jumper should not be plugged).If you are plugged the JP5 Jumper is used to do the alternate boot option.

JP6 Jumper is used for doing CAN termination.

  • CAN interface can optionally be terminated with a 120Ω Resistor, in case CQ7-A42 carrier is at one of the extremities of the CAN line CN26. To enable this termination, is necessary to use jumper JP6.

JP7 & JP8 Jumper is used to selecting for RS-232/RS-485 mode & RS-485 Half/Full Duplex mode.

  • on CQ7-A42 carrier board has been introduced a multi-standard transceiver, which allows using the serial port interface offered by the Qseven ® module in RS-232, RS-422 or RS-485 mode. Selection of working mode is made using jumpers JP7 and JP8.
  • If JP7 & JP8 Jumpers are not plugged , It's going to be work as RS-485 Half Duplex mode.
  • If JP7 is not plugged & JP8 is plugged , It's access to be work as RS-485 Full Duplex mode (RS-422).
  • If JP7 is plugged , It used to work as RS-232 serial mode.
  • Such a serial port is available on connector CN29, which is a standard DB-9 male connector.According to the working mode selected via jumpers JP7 and JP8.

JP9 Jumper is used for GPIO Bus interface selection.

  • If you are plugged the Jumper for IO ports placed on SM Bus, If not plugged jumper for IO ports placed on I2C bus.

So before access the carrier board, Check it your functionality & customize the Jumper. Then use the module accordingly.