MSC COM EXPRESS CX-MB-EVA2 Instrukcja Użytkownika Pobierz pdf (Strona 33)

CX-MB-EVA2 User's Manual Hardware

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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