Kontron speedMOPSlcdCE, Руководство пользователя

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KONTRON
USB Interfaces 32 speedMOPSlcdCE User’s Guide
13.
USB INTERFACES
The speedMOPSlcdCE comes with two USB 2.0 ports, which you can expand by adding external hubs.
You can connect up to 127 USB peripherals.
13.1
Connector
The USB ports are available through the J17 and the J18 connectors (4 pins) each. To find the
location of the USB ports on the speedMOPSlcdCE board, please see the Appendix E: Connector
Layout chapter. To have the signals available on the standard USB interface connectors, an adapter
cable is required. A USB interface cable is available from Kontron (KAB-USB-1, Part Number 96054-
0000-00-0).
The following table shows the pinouts for the USB connector.
Header Pin Signal Name Function
1 VCC * +5V
2 USB0 USB-
3 USB1 USB+
4 GND Ground
Notes : (
*) To protect the external power lines of peripheral devices, make sure that:
-- the wires have the right diameter to withstand the maximum available current
-- the enclosure of the peripheral device fulfils the fire-protecting requirements of
-- IEC/EN 60950.
The USB power lines are not protected. An additional resetable fuse is
recommended.
13.1.1.
Limitations
The power contacts for USB devices on Pin 1 and Pin 4 are not protected. They are suitable to supply
connected USB devices with a maximum of 500mA power dissipation. Do not supply external USB
devices with higher power dissipation through these pins. Always use a fuse when powering
external USB devices through these pins, otherwise a defective USB device may damage the
speedMOPSlcdCE. Kontron recommends using a resettable fuse, which follows the USB 1.1
specification, for power on external USB connectors.