2: Functional Description
xPico® Embedded Device Server Integration Guide
21
Figure 2-6 Reverse-SMA to U.FL(short) (Lantronix Part Number 500-182-R)
Antenna Placement (xPico Wi-Fi Units Only)
When designing the xPico Wi-Fi module to a mating board, it is important to consider the
final installation of the unit and its location with respect to connecting access points. The
antenna should be placed so that it has as clear as possible path to the connecting
access point for maximum range. Avoid placing the antenna such that it is blocked by
metal walls or ground planes of adjacent circuit boards.
Ethernet Interface (xPico Wired Units Only)
The xPico embedded device server integrates an internal 10/100Mbps Ethernet MAC and
PHY. An external magnetic module and RJ45 is required in order to connect to a
standard 10/100Mbps Ethernet network.
Table 2-6 Ethernet Interface Signals
Signal
Name
DIR
Contact
Primary Function
Signal Requirement
TX+
Out
13
Differential Ethernet
transmit data +
100 ohm differential with
TX-
TX-
Out
11
Differential Ethernet
transmit data -
100 ohm differential with
TX+
RX+
In
19
Differential Ethernet
receive data +
100 ohm differential with
RX-
RX-
In
17
Differential Ethernet
receive data -
100 ohm differential with
RX+
TCT
12
Ethernet transmit center
tap connection
Route > 20 mil width
RCT
18
Ethernet receive center tap
connection
Route > 20 mil width
The xPico embedded device server provides a 10/100 Mbps Ethernet interface for
connection to an external network through external magnetics and an external RJ45.
The table below lists several magnetic modules and combination RJ45/magnetic jacks
that can be used with the xPico unit.