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.
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USB ports
The CCOMe-C79 Carrier board offers the possibility of using all the possible USB ports
that are foreseen for COM Express Type 7 modules.
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.
More specifically, USB 3.1 port #0 is carried to the lower USB receptacle of CN18, while USB 3.1 port
#1 is carried to the upper USB receptacle of CN18.
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.
Signal description:
USB0+/USB0-: USB 2.0 Port #0 differential pair
US/USB_SSRX0-: USB Super Speed Port #0 receive differential pair
US/USB_SSTX0-: USB Super Speed Port #0 transmit differential pair
USB1+/USB1-: USB 2.0 Port #1 differential pair
US/USB_SSRX1-: USB Super Speed Port #1 receive differential pair
US/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
USB0
and +5V
USB1
are derived from +5V_ALW through a 1A current limited power switch.
USB 3.1 ports #0 / #1- CN18
Pin Signal
Pin Signal
1
+5V
USB0
10
+5V
USB1
2
USB0-
11
USB1-
3
USB0+
12
USB1+
4
GND
13
GND
5
USB_SSRX0-
14
USB_SSRX1-
6
US
15
US
7
GND
16
GND
8
USB_SSTX0-
17
USB_SSTX1-
9
US
18
US
