Seco Qseven CQ7-A42 User Manual page 28

USB 4-5 pin header - CN10
Pin Signal Pin Signal
1 +5V_A 2 +5V_A
3 USB_P4- 4 USB_P5-
5 USB_P4+ 6 USB_P5+
7 GND 8 GND
10 ---
Micro-AB USB connector - CN13
Pin Signal
1 USB_VBUS
2 USB_OTG-
3 USB_OTG+
4 USB_ID
5 GND
When the system (Carrier board + Qseven
disconnecting and reconnecting main power supply of the carrier board.
In case main power supply is disconnected, it is necessary to disconnect also the external Host from CN13 before reconnecting again the main PSU,
otherwise the system will not boot.
Signal description of this port:
USB_OTG+/USB_OTG-: USB Port #1 differential pair, switched to the micro-AB connector CN13 using the dedicated jumper JP2.
USB_VBUS: USB voltage rail. It is an input for USB port working in Client mode, an output for Host mode.
USB_ID: Client/Host identification signal. This signal is high when the USB port works in client mode, is low when works in Host mode.
Please be aware that the USB OTG port has been designed according to, published by SGET consortium, that foresee the use of signal USB_DRIVE_VBUS,
present on formerly reserved pin #56.
CQ7-A42
CQ7-A42 - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
Other than the USB ports available through the standard connectors CN11 and CN12, and
to the USB port available on miniPCI-express slot CN6 (which is shared with USB OTG port),
there are other two USB ports (#4 and #5) coming out from Qseven
used for the connection of external devices.
They are available on an internal 9-pin standard male pin header (CN10), p 2.54 mm, 4+ 5 pin, h= 6mm, with
the pinout shown in the table on the left.
For the connection of standard devices to this pin headers, it is needed an adapter cable. SECO can
optionally provide for such an adapter cable, as a part of the accessory kit p/n CABKITA42 (please check
chapter 4.2.1 for further details).
®
According to Qseven specification, USB Port #1, coming out from Qseven
functionalities (it depends on the functionalities offered by the Qseven
port is carried out through a standard micro-AB connector, described in the table on the left.
Depending on the support offered by the Qseven
it is necessary to connect micro-A or micro-B USB cables to connector CN13.
A micro-A USB cable has to be used when the system has to work in Host mode. In this case,
USB_VBUS is a power output of CQ7-A42 Carrier Board for the connected device.
When a micro-B USB cable is used, its USB_ID pin is floating; this way, the board acknowledges that it must
configure itself to work as a Client. In this case, USB_VBUS is an input of the carrier board from the external Host.
®
module) is working in client mode (i.e., an external Host is connected to port CN13), please avoid
®
module that can be
®
module used, however). For this reason, this
®
module, and from the needed use of the system,
®
module, could support OTG
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