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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 these connectors are standard type receptacles, they 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.
Please be aware that USB 3.0 connectivity can be obtained only in case that it is supported by the COM Express module plugged onto the Carrier
Board.
In case the COM Express module used doesn't offer one or all USB 3.0 ports, it will be always possible to use the corresponding USB 2.0 ports, simply
by plugging an USB 2.0 cable.
Avoid using USB 3.0 cables if the COM Express module used doesn't offer such an interface.
USB #4 #5 connector- CN5
Pin
Signal
Pin
Signal
1
+5V
5
+5V
USB4
2
USB4-
6
USB5-
3
USB4+
7
USB5+
4
GND
8
GND
USB #7 header- CN7
Pin
Signal
1
+5V
USB7
2
USB7-
3
USB7+
4
GND
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.
CCOMe-C30
CCOMe-C30 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by F.B. Copyright © 2019 SECO S.p.A.
Other than the USB 3.0 ports available through the standard connectors CN9 and CN10, there are other three
USB 2.0 ports (#4, #5 and #7) coming out from COM Express module that can be used for the connection of
external devices.
USB 2.0 ports #4 and #5 are available on a standard double Type-A receptacle.
USB5
Since this connector is a standard type receptacle, it can be connected to all types of USB 1.1
/ USB 2.0 devices using Standard-A USB 2.0 cables.
The remaining USB 2.0 port (USB #7) is available on an internal 4-pin standard male pin header
(CN7), p 2.54 mm, 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 (common adapter
cables for motherboard USB pin headers are suited for this purpose)
USB4+ / USB4-: USB 2.0 Port #4 differential pair.
USB5+ / USB5-: USB 2.0 Port #5 differential pair.
USB7+ / USB7-: USB 2.0 Port #7 differential pair.
41
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