Kontron KTA55-pITX - Manual (Page 22)

KTD-S0031-E Page 18 USB Interface
KTA55/pITX User's Guide
7 USB Interface
The USB interface comes with six USB ports which follow the OHCI/EHCI specification and are USB 2.0
compliant. You can expand the amount of USB connections by adding external hubs. Two ports are avail-
able on a standard connector and more ports on four extension connectors.
7.1 Standard Connector
Two USB ports are available through the standard USB connector J1801 (8 pins).
Header Pin Signal Name Function
1 VCC 1) Power +5V
2 USB0- USB port 0 (negative)
3 USB0+ USB port 0 (positive)
4 GND Ground
5 VCC 1) Power +5V
6 USB1- USB port 1 (negative)
7 USB1+ USB port 1 (positive)
1
5
8 GND Ground
7.2 Extension Connectors
The other USB ports are available through the extension connectors J1802/J1803 and J1805/J1806 (4
pins). To have the signals available on the standard USB interface connectors an adapter cable is required.
An USB interface cable is available from KONTRON (KAB-USB-2, part number 96054-0000-00-2).
Header Pin Signal Name Function
1 GND Ground
2 USBn+ USB port n (positive)
3 USBn- USB port n (negative)
1
4 VCC 1) Power +5V
Note: 1) 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 fulfills the fire-protecting conditions of IEC/EN 60950.
7.3 Limitations
The contacts for USB devices are protected. They are suitable to supply connected USB devices with a maxi-
mum input current of 500mA. Do not supply external USB devices with higher power dissipation through
these pins.