SBC-C43
SBC-C43 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by S.R. -Copyright © 2020 SECO S.p.A.
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USB Connectors
On SBC-C43 board there are two USB ports directly available on external connectors.
The USB downstream port #4 managed by the USB HSIC Hub is available on a 5-pin p1.27mm
connector type Molex p/n 53398-0571 or equivalent, with pinout shown in the table on the left.
Mating connector: MOLEX 51021-0500 receptacle with 50079-8000 female crimp terminals.
Signal Description of this port:
/USB_P4-: USB Port #4 differential pair; it is managed by Microchip USB4604 Hub
4.
+5V
USB4
voltage is derived from +5V_ALW power rail using a 600mA power switch.
In addition, there is an USB OTG Port, managed directly by the i.MX8 processor, which is carried to a standard micro-
AB connector, described in the table on the left.
Depending on the needed use of the system, it is necessary to connect micro-A or micro-B USB
cables to connector CN44
A micro-A USB cable has to be used when the system has to work in Host mode. In this case,
USB_VBUS is a power output of SBC-C43 Board for the connected device.
When a micro-B USB cable is used, its USB_ID pin is floating; this way, the board acknowledges that it must configure
itself to work as a Client. In this case, USB_VBUS is an input of the carrier board from the external Host.
Signal description of this port:
US/USB_OTG_D-: USB OTG Port #1 differential pair.
USB_VBUS: USB voltage rail. It is an input for USB port working in Client mode, an output for Host mode.
USB_ID: Client/Host identification signal. This signal is high when the USB port works in client mode, is low when works in Host mode.
USB 2.0 Internal Header CN20
Pin
Signal
1
+5V
USB4
2
USB_P4-
3
4
GND
5
SHLD (GND)
USB micro-AB connector CN44
Pin Signal
1
USB_VBUS
2
USB_OTG_D-
3
US
4
USB_ID
5
SHLD (GND)
