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USB ports
USB 3.1 ports #0 / #1- CN18
Pin
Signal
Pin
1
+5V
10
USB0
2
USB0-
11
3
USB0+
12
4
GND
13
5
USB_SSRX0-
14
6
USB_SSRX0+
15
7
GND
16
8
USB_SSTX0-
17
9
USB_SSTX0+
18
Signal description:
USB0+/USB0-: USB 2.0 Port #0 differential pair
USB_SSRX0+/USB_SSRX0-: USB Super Speed Port #0 receive differential pair
USB_SSTX0+/USB_SSTX0-: USB Super Speed Port #0 transmit differential pair
USB1+/USB1-: USB 2.0 Port #1 differential pair
USB_SSRX1+/USB_SSRX1-: USB Super Speed Port #1 receive differential pair
USB_SSTX1+/USB_SSTX1-: USB Super Speed Port #1 transmit differential pair
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.
+5V
and +5V
are derived from +5V_ALW through a 1A current limited power switch.
USB0
USB1
CCOMe-C79
CCOMe-C79 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by E.S. Copyright © 2021 SECO S.p.A.
The CCOMe-C79 Carrier board offers the possibility of using all the possible USB ports
that are foreseen for COM Express Type 7 modules.
Signal
The signals of USB 3.0 ports #0 ÷ #1 are carried to a double type-A USB 3.1 stacked
receptacle, type Winning p/n WDU3R-18F1B4PBUW3 or equivalent.
+5V
USB1
More specifically, USB 3.1 port #0 is carried to the lower USB receptacle of CN18, while USB 3.1 port
USB1-
#1 is carried to the upper USB receptacle of CN18.
USB1+
Since this connector is a standard type receptacle, it can be connected to all types of USB 1.1 / USB 2.0
GND
/ USB 3.0 devices using Standard-A USB 3.0 or USB 2.0 plugs.
USB_SSRX1-
For USB 3.0 connections it is mandatory the use of SuperSpeed certified cables, whose SuperSpeed
USB_SSRX1+
differential pairs are individually shielded inside the global cable's external shielding.
GND
USB_SSTX1-
USB_SSTX1+
48
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