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CX-MB-EVA2 User's Manual Hardware
33
4.12 USB Topology
Eight USB ports are provided by the COM Express module.
The exact assignment of each port is defined in the following table:
USB-Port References Beschreibung
USB0 X29 External dual connector 1
USB1 X29 External dual connector 1
USB2 X30 External dual connector 2
USB3 X30 External dual connector 2
USB4 X31 External dual connector 3
USB5 X31 External dual connector 3
USB6 X32 External dual connector 4
USB7 X32 External dual connector 4
Table 19 Assignment USB Ports
4.12.1 USB Power Supply
The power supplies are protected by USB power switches. In addition the input voltages
of the USB power switches are protected by resettable fuses.
The USB power switches have the following functions:
The output current is limited to 500mA per port
A signal to detect overcurrent is generated for each two ports
USB0 and USB1 have one common signal to detect overcurrent
USB2 and USB3 have one common signal to detect overcurrent
USB4 and USB5 have one common signal to detect overcurrent
USB6 and USB7 have one common signal to detect overcurrent
Specification:
References: X29 - X32
Connector: AMP 787617-2 (Dual USB connector type A)
Pinout: according to USB specification 2.0
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