Protouch-wide: user documentation
DOC/PROTOUCH-WIDE; V1.5
DOC_PROTOUCH_WIDE_V1.5.docx
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2.4.7
USB Interface
The PROTOUCH-WIDE features an OHCI/EHCI and a XHCI compatible USB host controller having assigned the base address and IRQ at boot
time by the PCI-BIOS. All ports support USB 2.0 devices and port 1 supports USB 3.0 devices with Superspeed.
Device Connection
The USB interface uses two standard A type double USB connector on the front for USB ports 1/2 and 3/4.
P20 bottom
Pin Number
USB port 1
Signal
P20 top
Pin Number
USB port 2
Signal
1
VBUS
1
VBUS
2
D-
2
D-
3
D+
3
D+
4
GND
4
GND
5
SSRX-
5
-
6
SSRX+
6
-
7
SSGND
7
-
8
SSTX-
8
-
9
SSTX+
9
-
Tab. 7
USB1/2 Interface Connector P20 (Dual Type A)
P21 bottom
Pin Number
USB port 3
Signal
P21 top
Pin Number
USB port 4
Signal
1
VBUS
1
VBUS
2
D-
2
D-
3
D+
3
D+
4
GND
4
GND
Tab. 8
USB3/4 Interface Connector P21 (Dual Type A)
Important
Note
Maximum cable length allowed for USB connection is 3 m. If longer cables are used, special
overvoltage and filtering elements must be installed to comply with the requirements of EMI/RFI
CE
-certification. Only use high quality industrial USB devices with sufficient EMI compatibility.
Use shielded cables for maximum EMI protection.
Drawing excessively power might disturb operation.
