Table of Contents
Advertisement
3.3.5 USB connectors
CQ7-A30 carrier board offers the possibility of connecting multiple USB devices, exploiting the USB lanes that can come out from Qseven
Common mode chokes are placed on all USB differential pairs for EMI compliance. For ESD protection, on all data and voltage lines are placed clamping diodes
for voltage transient suppression.
®
Since Qseven
standard offers the possibility of having up to two USB 3.0 ports, or up to eight USB 2.0 ports, onboard it is possible to select how the pins
dedicated to USB ports #4 / #5 / #6 / #7 are used (if for Superspeed connection, on connectors CN31 and/or CN33, or for USB 2.0 on connectors CN49 and/or
CN32).
SW6 Switch
ON Position
1
USB 3.0 Port #0 enabled
2
USB 3.0 Port #1 enabled
3
USB 2.0 port #2 on connector CN49
4
USB 3.0 port #0 is available on a single USB 3.0 type-A receptacle, CN31.
USB 3.0 Host Port #0 type A receptacle - CN31
Pin
Signal
Pin
1
+5V
USB0
2
USB_P0-
3
USB_P0+
4
GND
Please be aware that USB 3.0 connectivity can be obtained only in case that it is supported by the Qseven
Avoid using USB 3.0 cables if the Qseven
Please also remember that USB SuperSpeed interface is available on CN31 only when SW6 switch #1 is set on ON position.
CQ7-A30
CQ7-A30 - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
OFF Position
USB 2.0 Ports #6 / #7 Enabled
USB 2.0 Ports #4 / #5 Enabled
USB 2.0 port #2 on miniPCI-e slot
N.C.
Since this connector is a standard type receptacle, it can be connected to all
types of USB 1.1 / USB 2.0 / USB 3.0 devices using Standard-A USB 3.0 or
USB 2.0 plugs.
Signal
For USB 3.0 connections it is mandatory the use of SuperSpeed certified cables, whose
5
USB_SSRX0-
SuperSpeed differential pairs are individually shielded inside the global cable's external
6
USB_SSRX0+
shielding.
7
GND
The USB 2.0 Host port #0 is always available on the connector CN31 only. In case the
8
USB_SSTX0-
Qseven
port #0, simply by plugging an USB 2.0 cable.
9
USB_SSTX0+
®
module used doesn't offer such an interface.
The selection is made using dedicated Dip switch
SW6, with the meaning shown in the table on the left:
Please be aware that switches #1 and #2 must be set
accordingly to the functionalities supported by the
®
Qseven
module used (i.e., if it offers USB 3.0 or USB 2.0
N.C.
interface)
®
module used doesn't offer USB 3.0 ports, it will be always possible to use USB 2.0
®
module.
®
module plugged into the MXM connector.
30
Advertisement
Table of Contents
