2: Description and Specifications
XPort AR Integration Guide
11
Signal Name
XPort
R Pin #
Primary Functions
CHSGND
24
Chassis Ground
Note:
The four shield tabs are also Chassis Ground. Separate Chassis Ground
appropriately from the Signal Ground and route so as to safely dissipate electrostatic
discharge.
Ethernet Interface
The RJ-45 connector, Ethernet magnetics, PHY and Ethernet status LEDs are all integrated
into the XPort AR.
Table 2-3. Ethernet Interface Signals
Signal Name DIR
Contact Primary Function
Note
TX+
Out
1
Differential Ethernet
Transmit Data +
Magnetics center tap
provides signal POE12
TX-
Out
2
Differential Ethernet
Transmit Data -
RX+
In
3
Differential Ethernet
Receive Data +
Magnetics center tap
provides signal POE36
RX-
In
6
Differential Ethernet
Receive Data -
Not Used
4
(Terminated)
Pins 4 and 5 are tied
together, terminated and
form POE45
Not Used
5
(Terminated)
Not Used
7
(Terminated)
Pins 7 and 8 are tied
together, terminated and
form POE78
Not Used
8
(Terminated)
CHSGND
Shield
Chassis Ground
Reset
The XPort AR reset pin is an input-only pin and connects to an 811-type reset IC. Internal to
the 811 is a 20k pull-up. This is the only influence the XPort AR has on the reset pin. This
input is intended for a push-button switch type manual reset. If no external reset control is
desired, leave this pin floating.
LEDs
The XPort AR contains the following LEDs:
Link (bi-color, left LED)
Activity (bi-color, right LED)