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KTD-S0031-E
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).
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1
5
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).
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1
Note:
To protect the external power lines of peripheral devices make sure that
1)
- 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.
Page 18
Pin
Signal Name
1)
1
VCC
USB0-
2
USB0+
3
GND
4
1)
5
VCC
6
USB1-
7
USB1+
GND
8
Pin
Signal Name
1
GND
2
USBn+
3
USBn-
1)
4
VCC
KTA55/pITX User's Guide
USB Interface
Function
Power +5V
USB port 0 (negative)
USB port 0 (positive)
Ground
Power +5V
USB port 1 (negative)
USB port 1 (positive)
Ground
Function
Ground
USB port n (positive)
USB port n (negative)
Power +5V
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