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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A distinct USB OTG interface is carried through a Microchip USB2514 USB2.0 Hi-Speed Hub
Controller, which makes available four USB 2.0 downstream host ports.
The first downstream port is carried to mini PCI-e Slot (see par. 3.3.11), the second and third are
carried to CN24, a standard double USB Type-A receptacle, shielded, type ALLEN p/n HZ-002-
ANW-L or equivalent.
Since this connector is a standard type-A receptacle, it can be connected to all types of USB 1.1 / USB 2.0
devices using standard-A USB 2.0 plugs
USB2+/USB2-: USB Hub Downstream port #2 differential pair.
USB3+/USB3-: USB Hub Downstream port #3 differential pair.
The fourth downstream port is used as USB host interface for T/S functionalities in case an external display panel supporting
T/S via USB is used.
This interface is made available on CN17 through dedicated 5-pin 2mm pitch Pin header, type HR p/n
a2001wv-s-5p, with pinout shown in the table for CN17.
Mating connector: type HR p/n a2001h-5p receptacle with HR a2001-TP female crimp terminals.
USB4+/USB4-: USB Hub Downstream port #4 differential pair.
All USB ports
’
voltages with nomenc5V
USBx
are derived, through power switches ICs, from +5V_RUN voltage.
The USB T/S port voltage is derived from +5V_RUN voltage through a resettable fuse and no power switch IC.
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.
Dual USB 2.0 Type-A Socket CN24
Pin Signal
Pin Signal
1
+5V_RUN
5
+5V_RUN
2
USB2_D-
6
USB3_D-
3
7
4
GND
8
GND
USB T/S Connector CN17
Pin Signal
1
+5V_RUN
2
USB4_D-
3
4
GND
5 TS_RST#
