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.
30
Please be aware that USB 3.0 connectivity can be obtained only in case that it is supported by the Qseven
®
module plugged into the MXM connector.
Avoid using USB 3.0 cables if the Qseven
®
module used doesn
’
t offer such an interface.
Please also remember that USB SuperSpeed interface is available on CN31 only when SW6 switch #1 is set on ON position.
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
®
module.
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).
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
interface)
USB 3.0 port #0 is available on a single USB 3.0 type-A receptacle, CN31.
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.
For USB 3.0 connections it is mandatory the use of SuperSpeed certified cables, whose
SuperSpeed differential pairs are individually shielded inside the global cable
’
s external
shielding.
The USB 2.0 Host port #0 is always available on the connector CN31 only. In case the
Qseven
®
module used doesn
’
t offer USB 3.0 ports, it will be always possible to use USB 2.0
port #0, simply by plugging an USB 2.0 cable.
SW6 Switch
ON Position
OFF Position
1
USB 3.0 Port #0 enabled
USB 2.0 Ports #6 / #7 Enabled
2
USB 3.0 Port #1 enabled
USB 2.0 Ports #4 / #5 Enabled
3
USB 2.0 port #2 on connector CN49
USB 2.0 port #2 on miniPCI-e slot
4
N.C.
N.C.
USB 3.0 Host Port #0 type A receptacle - CN31
Pin Signal
Pin Signal
1
+5V
USB0
5
USB_SSRX0-
2
USB_P0-
6
US
3
7
GND
4
GND
8
USB_SSTX0-
9
US