Seco SBC-D23 User Manual page 35

STM32 USB connector CN31
Pin Signal
1 +5V_USB_EC
2 STM32_USB_D-
3 STM32_USB_D +
4 GND
All USB ports' voltages (+5V and +5V_USB_EC) are derived, through a power switch IC, from +5V_STBY voltages.
USBx
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.
SBC-D23
SBC-D23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by P.Z. - Copyright © 2021 SECO S.p.A.
The board can offer an additional USB Client interface, managed by the STM32F302 microcontroller.
This is available on CN31, which is a 1.25mm pitch connector type Molex p/n 53398-0471 or equivalent.
Mating connector: MOLEX 51021-0400 receptacle with MOLEX 50079-8000 female crimp terminals.
STM32_USB_D1+/STM32_USB_D1-: STM32 USB Controlled Port #1 differential pair.
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