Seco Qseven CQ7-D59 User Manual page 32

Micro-AB USB connector - CN13
Pin Signal
1 USB_VBUS
2 USB_OTG-
3 USB_OTG+
4 USB_ID
5 GND
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.
Correct USB OTG functionalities, therefore, are ensured only for modules developed according to Qseven
JP2 position USB_P1 routed to
Not inserted USB double type A (CN12)
Inserted USB micro-AB connector (CN13)
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 also disconnect the external Host from CN13 before reconnecting again the main PSU,
otherwise the system will not boot.
CQ7-D59
CQ7-D59 - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.O. - Reviewed by S.B. Copyright © 2021 SECO S.p.A.
®
According to Qseven specification, USB Port #1, coming out from Qseven
functionalities (it depends on the functionalities offered by the Qseven
this 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
system, 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-D59 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.
Please be aware that USB Port #1, coming out from Qseven module, will be available on USB OTG port only
in case that the jumper JP2 is configured
®
module) is working in client mode (i.e., an external Host is connected to port CN13), please avoid
®
module, could support OTG
®
module used, however). For this reason,
® module, and from the needed use of the
®
Specifications rel. 2.0 Errata Sheet.
properly, according to the table on the left.
32