815. USB Device – P4The UEZGUI-EXP-DK Board includes one USB Device Interface allowing the unit to be connected to a USB Host, such as aPC. Through this connection, the uEZGUI represents a peripheral to the USB Host. The operational mode of the port isdependent 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 theUSB Host since 500mA is the maximum current allowable via USB. This port can also be used with a USB OTG adapter tofunction 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 theuEZGUI Main board. To avoid damage or improper operation, do not connect both of these at the same time.P4 Pin Number Description1 USB 5V2 D-3 D+4 USB ID Pin (Host Mode Detect Active Low)5 Signal Ground16. Ethernet – J3The 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 lowcost ABRACON ARJP11C-MASA-A-B-EMU2 connector was specifically selected for use with PoE and 10/100 Base-T.J3 Pin Number Description1 Tx +2 Tx –3 Rx +4 75 ohm terminated5 75 ohm terminated6 Rx –7 75 ohm terminated8 75 ohm terminated