SBC-C57
SBC-C57 User Manual - Rev. First Edition: 1.0 - Author: S.O. - Reviewed by R.Z. - Copyright © 2021 SECO S.p.A.
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3.3.10
USB Connectors
The SBC-C57 board offers the possibility for connecting multiple standard USB ports.
A micro-AB connector for USB OTG interface is present on the bottom side of the board. An Hirose
p/n ZX62D-AB-5P8 or equivalent is used, pinout is described in the table on the left.
On CN22 the USB_ID pin is always left floating and +5V_USB_OTG is an input supplied by the
external Host (i.e. no external device can be powered from this connector).
When a Host device is connected to connector CN22, using a micro-A or micro-B USB cable, the SBC-C57
configures itself to work as a Client. In case the external Host device cannot supply the +5V_USB_OTG signal, it is
possible to insert a jumper in JP1 to obtain the same functionality.
USB/USB_OTG2_1-: USB OTG2 Port #1 differential pair.
+5V_USB_OTG: USB voltage rail. It is an input for USB port to enable Client mode when a Host device is connected (bypassed by jumper JP1).
USB_ID: Client/Host identification signal. This signal is always left floating.
When no Host device is connected to CN22 and no jumper is inserted in JP1, the same USB OTG
gets set to Client mode and is carried to a standard USB 3.0 Type-A receptacle on CN23, type
WELLCO p/n USB3A-0A01E001 or equivalent, with the pinout shown on the table to the left.
USB/USB_OTG2_2-: USB OTG2 Port #2 differential pair.
US/USB SSRX1-: USB Super Speed Port #1 receive differential pair
US/USB SSTX1-: USB Super Speed Port #1 transmit differential pair
USB micro-AB Connector CN22
Pin Signal
1
+5V_USB_OTG
2
USB_OTG2_1-
3
USB
4
USB_ID
5
GND
USB 3.0 type A receptacle CN23
Pin Signal
Pin Signal
1
+5V_RUN
5
USB_SSRX1-
2
USB_OTG2_2-
6
US
3
USB
7
GND
4
GND
8
USB_SSTX1-
9
US
