8
15.
USB Device – P4
The UEZGUI-EXP-DK Board includes one USB Device Interface allowing the unit to be connected to a USB Host, such as a
PC. Through this connection, the uEZGUI represents a peripheral to the USB Host. The operational mode of the port is
dependent on the software utilized (i.e. Mass Storage or Human-Interface).
The UEZGUI-EXP-DK Board may also be powered via the USB Device connector. Care must be taken to not overload the
USB Host since 500mA is the maximum current allowable via USB. This port can also be used with a USB OTG adapter to
function as a USB Host port on select uEZGUI units such as the uEZGUI-1788-43WQR.
Note: The USB Device connector of the Expansion Board is connected in parallel to the USB Device connector of the
uEZGUI Main board.
To avoid damage or improper operation, do not connect both of these at the same time
.
P4 Pin Number
Description
1
USB 5V
2
D-
3
D+
4
USB ID Pin (Host Mode Detect Active Low)
5
Signal Ground
16.
Ethernet – J3
The UEZGUI-EXP-DK Board includes one 10/100 Ethernet Port to interface to a local area network via CAT5 cable.
Please refer to the specific details of the processor being utilized for support of the Ethernet function. Note that the low
cost ABRACON ARJP11C-MASA-A-B-EMU2 connector was specifically selected for use with PoE and 10/100 Base-T.
J3 Pin Number
Description
1
Tx +
2
Tx –
3
Rx +
4
75 ohm terminated
5
75 ohm terminated
6
Rx –
7
75 ohm terminated
8
75 ohm terminated
