Lantronix, xPico and DSTni are registered trademarks of Lantronix, Inc. in the United
States and other countries. DeviceInstaller is a trademark of Lantronix, Inc.
Wi-Fi is a registered trademark of Wi-Fi Alliance Corporation. Ethertronics is a trademark
of Ethertronics, Inc. Wanshih is a trademark of Wanshih Electronic Co., Ltd. Exar is a
trademark of Exar Corporation. SEMTECH is a trademark of Semtech Corporation. All
other trademarks and trade names are the property of their respective holders.
Contacts
Lantronix, Inc.
7535 Irvine Center Drive
Suite 100
Irvine, CA 92618, USA
Toll Free: 800-526-8766
Phone: 949-453-3990
Fax: 949-453-3995
Technical Support
Online: www.lantronix.com/support
Sales Offices
For a current list of our domestic and international sales offices, go to the Lantronix web
site at www.lantronix.com/about/contact
Disclaimer
All information contained herein is provided “AS IS.” Lantronix undertakes no obligation
to update the information in this publication. Lantronix does not make, and specifically
disclaims, all warranties of any kind (express, implied or otherwise) regarding title, noninfringement, fitness, quality, accuracy, completeness, usefulness, suitability or
performance of the information provided herein. Lantronix shall have no liability
whatsoever to any user for any damages, losses and causes of action (whether in
contract or in tort or otherwise) in connection with the user’s access or usage of any of
the information or content contained herein. The information and specifications
contained in this document are subject to change without notice.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one of the following measures:
xPico® Embedded Device Server Integration Guide2
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
4. Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
This device is intended only for OEM Integrators. The OEM integrator should be aware of
the following important issues.
Labeling of the End Product (xPico Wi-Fi units only)
The label on the end product incorporating the xPico Wi-Fi module must clearly state that
it contains an FCC-approved RF module. Canada and Japan also require a similar
statement.
For example, “This product contains RF transmitter ID # (put FCC, IC, and/or Japan
module grant numbers here).” The label must include the ID numbers for the regions
where the end product is installed. The grant numbers are below.
xPico Wi-Fi FCC ID number: R68XPICOW
xPico Wi-Fi IC ID number: 3867A-XPICOW
xPico Wi-Fi Japan ID numbers: 201-135275
RSS-GEN Sections 7.1.4 and 7.1.5 Statement for Devices with Detachable Antennas (xPico
Wi-Fi units only)
This device has been designed to operate with the antennas listed in the Certificate, and
having a maximum gain of 2.88 dBi. Antennas not included in this list or having a gain
greater than 2.88 dBi are strictly prohibited for use with this device, unless system level
FCC approval is gained. The required antenna impedance is 50 ohms.
To reduce potential radio interference to other users, the antenna type and its gain
should be so chosen that the equivalent isotropically radiated power (EIRP) is not more
than that required for successful communication.
This module is authorized under limited module approval specified to mobile host
equipment. So, the antenna must be installed such that 20cm is maintained between
the antenna and users.
The transmitter module may not be co-located with any other transmitter or antenna.
As long as the two conditions above are met, further transmitter testing will not be
required. However, the OEM integrator is still responsible for testing their end product
for any additional compliance requirements required with this module installed (for
example, digital device emission, PC peripheral requirements, etc.)
In the event that these conditions cannot be met (for example certain laptop
configurations, general purpose PCMCIA or similar cards, or co-location with another
transmitter) and obtaining a separate FCC authorization will be required, then the
FCC authorization is no longer considered valid and the FCC ID cannot be used on
the final product (including the transmitter).
Changes or modifications to this device not explicitly approved by Lantronix will void
the user's authority to operate this device.
xPico® Embedded Device Server Integration Guide 3
Note: With the purchase of any xPico family product, the OEM agrees to an OEM
Date
Rev.
Comments
April 2012
A
Initial release.
September 2012
B
Updated the reference schematic, mounting instructions and
compliance information.
Updated part number and module dimension information.
September 2017
L
Updated compliance information.
firmware license agreement that grants the OEM a non-exclusive, royalty-free
firmware license to use and distribute the binary firmware image provided, only to the
extent necessary to use the xPico hardware. For further details, please see the xPico
OEM firmware license agreement.
Warranty
For details on the Lantronix warranty policy, please go to our Web site at
www.lantronix.com/support/warranty
Revision History
.
For the latest revision of this product document, please check our online documentation
at www.lantronix.com/support/documentation
.
xPico® Embedded Device Server Integration Guide 4
Table of Contents
Intellectual Property __________________________________________________ 2
Contacts ___________________________________________________________ 2
Disclaimer __________________________________________________________ 2
Warranty ___________________________________________________________ 4
Revision History _____________________________________________________ 4
List of Figures _______________________________________________________ 6
List of Tables ________________________________________________________ 7
1. Introduction 8
About the Integration Guide ____________________________________________ 8
Additional Documentation ______________________________________________ 9
2. Functional Description 10
xPico Features _____________________________________________________ 11
xPico Wi-Fi Features _________________________________________________ 11
xPico Block Diagram _________________________________________________ 13
xPico Wi-Fi Block Diagram ____________________________________________ 14
PCB Interface ______________________________________________________ 15
Mating Connector ___________________________________________________ 19
Antenna Interface (xPico Wi-Fi Units Only) _______________________________ 19
Antenna Placement (xPico Wi-Fi Units Only) ______________________________ 21
Ethernet Interface (xPico Wired Units Only) _______________________________ 21
Serial Interface _____________________________________________________ 23
USB Device Port (xPico Wi-Fi Units Only) ________________________________ 25
LEDs _____________________________________________________________ 26
General Purpose I/O Pins _____________________________________________ 26
Reset Pins _________________________________________________________ 27
Evaluation Board Schematics __________________________________________ 28
3. Mounting Instructions and PCB Footprint 33
To Access CAD Files ________________________________________________ 33
To Install the xPico or xPico Wi-Fi Module ________________________________ 33
Product Information Label _____________________________________________ 38
This user guide provides the information needed to integrate the Lantronix® xPico®
embedded device servers into customer-printed circuit boards. This manual is intended
for engineers responsible for integrating the xPico embedded device server into their
product.
Note: This document includes support for xPico embedded device server
versions XPC100100B-01, XPC100100S-01, XPC100100K-02, XPC10010MB-01
and XPC10010MS-01, and xPico Wi-Fi embedded device server versions
XPW100100B-01, XPW100100S-01 and XPW100100K-02. For integration
information for the Lantronix xPico Wi-Fi SMT embedded device server modules,
XPCW1002 and XPC@10003, please reference document 900-714 xPico Wi-Fi
SMT Embedded Device Server Integration Guide.
The sections in chapter 2 provide board schematic and layout recommendations for both
xPico (wired) and xPico Wi-Fi® products. Some of the sections apply to xPico (wired)
only or xPico Wi-Fi units only. Signals that are unused for a particular product can be left
floating. If the application has the potential to use both components as a stuff option it is
recommended to follow the design guide for all of the sections. The table below lists
which sections are applicable to the xPico (wired) and xPico Wi-Fi products.
Note: “xPico” (wired) refers to the Ethernet-only versions of xPico embedded
device server.
Table 1-1 xPico and xPico Wi-Fi Features
xPico® Embedded Device Server Integration Guide 8
Additional Documentation
Document
Description
Visit the Lantronix web site at www.lantronix.com/support/documentation for the latest
documentation and the following additional documentation.
1: Introduction
xPico Wi-Fi SMT
Embedded Device Server
User Guide
xPico Embedded Device
Server User Guide
xPico Wi-Fi Embedded
Device Server User Guide
xPico Embedded Device
Server Development Kit
Quick Start
xPico Embedded Device
Server Development Kit
User Guide
APS: Modbus Protocol
User Guide
DeviceInstaller™ User
Guide
Com Port Redirector User
Guide
Datasheet for the xPico Wi-Fi W1002 and W1003 SMT
modules.
Provides information needed to configure, use, and
update the xPico firmware.
Provides information needed to configure, use, and
update the xPico Wi-Fi firmware.
Provides the steps for getting the xPico device server up
and running.
Provides a detailed description of the xPico evaluation
kit hardware
Provides detailed information for installing and operating
the IAP device server using our Modbus firmware.
Provides instructions for using the Windows® based
utility to configure the xPico and other Lantronix device
servers.
Provides information on using the Windows based utility
to create a virtual com port.
xPico® Embedded Device Server Integration Guide 9
Part Number
Description
XPC100100B-01
xPico Device Server Module, Extended Temp, AES Encryption, Bulk, RoHS
XPC100100S-01
xPico Device Server Module, Extended Temp, AES Encryption, Sample,
RoHS
XPC100100K-02
xPico Device Server Module Development Kit w/ Module, RoHS
xPico Wi-Fi — IEEE 802.11 b/g/n Device Server Development Kit w/ Module,
RoHS
XPC10010MB-01
xPico IAP Device Server Module, Extended Temperature, Modbus, RoHS,
Bulk
XPC10010MS-01
xPico IAP Device Server Module, Extended Temperature, Modbus, RoHS,
Sample
2. Functional Description
Designed for quick integration with minimal engineering effort, the chip-sized xPico
embedded device server provides simplicity and flexibility making it the easiest and
fastest networking-enabling module on the market.
xPico and xPico Wi-Fi device servers are extremely compact networking solution that
enables Ethernet or Wireless connectivity on virtually any device with a serial interface.
The included industry-proven Lantronix device server application and full IP stack allow
seamless remote access to device data simplifying design integration while providing
robust connectivity.
As one of the smallest embedded device servers in the world, xPico and xPico Wi-Fi
embedded device servers can be utilized in designs typically intended for chip solutions.
A key difference with the xPico device server is that there is virtually no need to write a
single line of code, translating to a much lower development cost and faster time-tomarket.
Table 2-1 xPico Part Numbers
xPico® Embedded Device Server Integration Guide 10
xPico Features
The xPico device server contains Lantronix’s own DSTni® EX controller, with 256 KBytes
of SRAM, 16 KBytes of boot ROM, and integrated 10/100 PHY.
The xPico embedded device server also contains the following:
3.3-volt serial interface
8 Configurable I/O pins
All logic level I/O pins are 5V input tolerant
4-Mbit flash memory
Power supply filters
Reset circuit
+1.8V regulator
Note: The xPico embedded device server does not contain integrated Ethernet
magnetics. An external Ethernet magnetic module and RJ45 Jack is required to
interface to a standard 10/100Mbps Ethernet network.
The xPico unit requires +3.3-volt power and is designed to operate in an extended
temperature range (see technical data).
2: Functional Description
xPico Wi-Fi Features
The xPico Wi-Fi device server contains Cortex M3 ARM processor with 128KByte of
SRAM and 1MByte of embedded Flash memory. The unit also includes an 802.11 b/g/n
WLAN radio with a U.FL port for connection to an external antenna.
The xPico Wi-Fi embedded device server also contains the following:
3.3-volt serial interface
8 Configurable I/O pins
All logic level I/O pins are 5V input tolerant
8-Mbit flash memory (in addition to the 1MByte CPU embedded Flash)
Power supply filters
Reset circuit
Note: xPico Wi-Fi units do not contain an integrated antenna. An external
antenna is required for connection to a WLAN network.
The xPico Wi-Fi embedded device server requires +3.3-volt power and is designed to
operate in an extended temperature range (see technical data).
xPico® Embedded Device Server Integration Guide 11
2: Functional Description
xPico Unit
xPico Wi-Fi Unit
Figure 2-1 xPico and xPico Wi-Fi Dimensions and Views
xPico® Embedded Device Server Integration Guide 12
-
xPico Block Diagram
The following drawing is a block diagram of the xPico embedded device server showing
the relationships of the components.
2: Functional Description
Figure 2-2 xPico Block Diagram
xPico® Embedded Device Server Integration Guide 13
xPico Wi-Fi Block Diagram
DC Power
3.3V
8 Mb Serial
Flash
Cortex M3
Processor
To external
USB Device
3.3V
Serial 1
GPIO/SPI
40 Pin Connector
Interface
USB
To external
processor/
logic
To external
LED
SYSTEM LED
RESET/DEFAULTS
WAKE
802.11 b/g/n
Chipset
U.FL to
external
antenna
The following drawing is a block diagram of the xPico Wi-Fi embedded device server
showing the relationships of the components.
Figure 2-3 xPico Wi-Fi Block Diagram
2: Functional Description
xPico® Embedded Device Server Integration Guide 14
PCB Interface
Pin#
xPico Wired
xPico Wi-Fi
Pin#
xPico Wired
xPico Wi-Fi
1
GND
GND 2
GND
GND
3
CP8
CP8/SPI_CS
4 LED1/LINK
LED1/WLAN_LED
5
RTS1
RTS1 6
LED0/SPEED
NC
7
RXD1
RXD1 8
LED2/ACTIVITY
NC
9
GND
GND 10
TXD1
TXD1
11
ETX-
NC 12
ETCT
NC
13
ETX+
NC 14
LED3/DUPLEX(OUT)
WKUP (IN)
15
GND
GND 16
CTS1
CTS1
17
ERX-
NC 18
ERCT
NC
19
ERX+
NC 20
SYS_LED
SYS_LED
21
GND
GND 22
Reserved
DDP
23
RXD2
RXD2 24
Reserved
DDM
25
TXD2
TXD2 26
CP2/INT
CP2/SPI_INT
27
CP7
CP7/SPI_SCK
28
CP3
CP3/MISO
29
+3.3V
+3.3V 30
CP4
CP4/MOSI
31
+3.3V
+3.3V 32
CP5
CP5
33
+3.3V
+3.3V 34
CP6
CP6
35
CP1
CP1 36
DEFAULT#(IN)
DEFAULT#(IN)
37
GND
GND 38
EXT_RESET#(IN)
EXT_RESET#(IN)
39
GND
GND 40
GND
GND
The xPico embedded device servers has a serial interface compatible with data rates up
to 921,600 bps (in high-performance mode). The serial signals (RX, TX, RTS, CTS, and all CPs) are 3.3V CMOS logic level and 5V tolerant. The serial interface pins include +3.3V,
ground, and reset. The serial signals usually connect to an internal device, such as a
UART. For applications requiring an external cable running with RS-232 or RS422/485
voltage levels, the xPico device must interface to a serial transceiver chip. All
configurable I/O pins are 3.3V CMOS logic level and 5V input tolerant. The xPico unit
requires a mating connector. Customers should layout their PCB for Hirose part number
DF40C(2.0)-40DS-0.4V(51).
An external Ethernet magnetic module and RJ45 is required to interface the xPico
embedded device server to a standard 10/100Mbps Ethernet network.
An external antenna attached to the xPico Wi-Fi U.FL connector is required to connect to
an 802.11b/g/n wireless network.
Shown below is the xPico pin connection diagram highlighting the differences between
the xPico and xPico Wi-Fi embedded device server.
2: Functional Description
Table 2-2 xPico and xPico Wi-Fi Pin Connections
xPico® Embedded Device Server Integration Guide 15
2: Functional Description
Signal Name
xPico
Pin #
Primary Function
Reset
State
Internal
Pull-up
Driver
Strength
GND
1
Signal Ground
GND
2
Signal Ground
CP8
3
Configurable I/O
Input
Active 56K
to 122K
4mA
LED1/LINK
4
Ethernet Link LED, active low
Output
8mA
RTS1
5
Serial ready to send/ serial
transmit enable
Output
2mA
LED0/SPEED
6
Ethernet speed LED, active
low
Output
8mA
RXD1
7
Serial receive data input 1
Input
Active 56K
to 122K
LED2/ACTIVITY
8
Ethernet Activity LED, active
low
Output
8mA
GND
9
Signal Ground
TXD1
10
Serial transmit data output 1
Output
2mA
TX-
11
Ethernet transmit differential
(neg)
Output
TCT
12
Ethernet transmit center tap
TX+
13
Ethernet transmit differential
(pos)
Output
LED3/DUPLEX
14
Ethernet Duplex LED, active
low
Output
8mA
GND
15
Signal Ground
CTS1
16
Serial Clear to Send
Input
Active 56K
to 122K
RX-
17
Ethernet receive differential
(neg)
Input
RCT
18
Ethernet receive center tap
RX+
19
Ethernet receive differential
(pos)
Input
SYSTEM_LED
20
System status LED, active
high
Input
Active 56K
to 122K
4mA
GND
21
Signal Ground
Reserved
22
Reserved for future use. Do
not connect.
RXD2
23
Serial receive data input 2
Input
Active 56K
to 122K
Reserved
24
Reserved for future use. Do
not connect.
TXD2
25
Serial transmit data output 2
Output
2mA
CP2/INT
26
Configurable I/O-External
interrupt input
Input
Active 56K
to 122K
4mA
Table 2-3 xPico (wired) PCB Interface Signals
xPico® Embedded Device Server Integration Guide 16
2: Functional Description
Signal Name
xPico
Pin #
Primary Function
Reset
State
Internal
Pull-up
Driver
Strength
CP7
27
Configurable I/O
Input
Active 56K
to 122K
4mA
CP3
28
Configurable I/O
Input
Active 56K
to 122K
4mA
3V3
29
3.3V Input Power
CP4
30
Configurable I/O
Input
Active 56K
to 122K
4mA
3V3
31
3.3V Input Power
CP5
32
Configurable I/O
Input
10K
4mA
3V3
33
3.3V Input Power
CP6
34
Configurable I/O
Input
10K
4mA
CP1
35
Configurable I/O
Input
Active 56K
to 122K
4mA
DEFAULT#
36
Unit reset to default, active
default settings.
Input
Active 56K
GND
37
Signal Ground
EXT_RESET#
38
Unit hardware reset, active
low. Drive low to reboot unit.
Input
10K
GND
39
Signal Ground
GND
40
Signal Ground
Signal Name
xPico
Primary Function
Reset
Internal
down
Driver
GND
1
Signal Ground
GND
2
Signal Ground
CP8/SPI_CS
1
3
Configurable I/O/ SPI Chip
Select
Input,
floating
30K to 50K
8mA
LED1/WLAN_LED
4
WLAN Link, active low
Input,
floating
30K to 50K
8mA
RTS17
5
Serial ready to send/ serial
transmit enable
Input,
floating
30K to 50K
8mA
NC 6 No Connect
RXD1
7
Serial receive data input 1
Input,
floating
30K to 50K
NC 8 No Connect
GND
9
Signal Ground
TXD1
10
Serial transmit data output 1
Input,
30K to 50K
8mA
low.
Drive low to reset unit to
to 122K
Table 2-4 xPico Wi-Fi PCB Interface Signals
Pin #
State
Pull-up
Strength
/Pull-
xPico® Embedded Device Server Integration Guide 17
2: Functional Description
Signal Name
xPico
Primary Function
Reset
Internal
down
Driver
floating
NC
11
No Connect
NC
12
No Connect
NC
13
No Connect
WKUP4 14
System Wake Up on Rising
Edge
Input,
floating
30K to 50K
GND
15
Signal Ground
CTS17
16
Serial Clear to Send
Input,
floating
30K to 50K
NC
17
No Connect
NC
18
No Connect
NC
19
No Connect
SYSTEM_LED
20
System status LED, active
high
Input,
floating
30K to 50K
8mA
GND
21
Signal Ground
DDP2 22
USB (positive)
RXD2
23
Serial receive data input 2
Input,
floating
30K to 50K
DDM2 24
USB Negative
TXD2
25
Serial transmit data output 2
Input,
floating
30K to 50K
8mA
CP2/INT
1
26
Configurable I/O-External
interrupt input
Input,
floating
30K to 50K
8mA
CP7/SPI_SCK
1
27
Configurable I/O/ SPI Clock
Input,
floating
30K to 50K
8mA
CP3/MISO
1
28
Configurable I/O/SPI Master
In-Slave Out
Input,
floating
30K to 50K
8mA
3V3
29
3.3V Input Power
CP4/MOSI
1
30
Configurable I/O/ SPI Master
Out-Slave In
Input,
floating
30K to 50K
8mA
3V3
31
3.3V Input Power
CP5
32
Configurable I/O
Input,
floating
30K to 50K
8mA
3V3
33
3.3V Input Power
CP6
34
Configurable I/O
Input,
floating
30K to 50K
8mA
CP1
35
Configurable I/O
Input,
floating
30K to 50K
8mA
DEFAULT#
36
Unit reset to default, active
Drive low to reset unit to
Input,
30K to 50K
Pin #
State
Pull-up
/Pull-
Strength
xPico® Embedded Device Server Integration Guide 18
low.
floating
2: Functional Description
Signal Name
xPico
Primary Function
Reset
Internal
down
Driver
default settings.
GND
37
Signal Ground
EXT_RESET#
38
Unit hardware reset, active
low. Drive low to reboot unit.
Input
30K to 50K
GND
39
Signal Ground
GND
40
Signal Ground
Antenna Type
Peak Gain
Lantronix Part
Vendor
Vendor
Number
PCB Strip Antenna
With tape backing
1.5 to 2.5dBi, 2.39
XPW100A003-01-B
Ethertronics®
1001077
Pin #
State
Pull-up
Strength
/Pull-
Note 1: The xPico Wi-Fi SPI interface supports master only. Slave mode operation will be supported in a future firmware release.
Note 2: The xPico Wi-Fi USB interface is USB 2.0 full speed device. The device interface connector and power interface must be designed into the
mating board.
Note 3: xPico and xPico Wi-Fi embedded device servers may be designed into the same socket. Signals listed as no connect on xPico Wi-Fi embedded device server may be connected on an xPico base design board. For example, xPico Wi-Fi pins 11, 12, 13, 17, 18, and 19 may connect
to an Ethernet magnetic module as designed for xPico (wired), however, Ethernet will not be available on those pins for xPico Wi-Fi.
Note 4: Pin 14 is the Ethernet duplex LED output on xPico (wired) and the system wakeup input on xPico Wi-Fi. For board designs supporting both
xPico (wired) and xPico Wi-Fi, a zero ohm resistor or removable jumper stuff option should be used to disconnect any on-board logic driving pin 14
when xPico (wired) unit is installed.
Note 5: The CP pins can be configured as pull-up or pull-down. T he WKUP pi n is not configurable and is always pull-down.
Note 6: The IO pins on xPico Wi-Fi embedded device server are configured as floating-input on reset until configured by firmware. For applications
requiring a high signal on power up, an external pull-up may be required or removeable jumper.
Note 7: It is highly recommended to connect RTS and CTS for serial port 1.
Note: For integration information for Lantronix xPico Wi-Fi SMT embedded
device server modules, XPC W1002 and XPC W1003 please reference the 900714 xPico Wi-Fi SMT Integration Guide.
Mating Connector
The mating connector for the xPico and xPico Wi-Fi module is Hirose part number
DF40C (2.0)-40DS-0.4V (51). Special care must be taken when mating and unmating
the module to the mating connector. Refer to the Hirose DF40 data sheet below for
proper connector mating and unmating, along with the proper connector footprint.
Mating connector data sheet: http://www.hirose.co.jp/cataloge_hp/e68440018.pdf
Antenna Interface (xPico Wi-Fi Units Only)
The xPico Wi-Fi module has been certified using the external antennas listed below. Per
FCC guidelines, the xPico Wi-Fi certification remains valid if using an antenna of similar
type to the antennas below. If using an antenna of similar type to one of the antennas
below, but from a different manufacturer part number the antenna gain must be equal to
or less than specified in the table. Consult with your certification lab for more details.
Table 2-5 xPico Wi-Fi External Antenna Options
with 50mm cable to
U.FL connector
Typical
Ghz to 2.49 Ghz
Number
(50 piece bulk pack)
Part
xPico® Embedded Device Server Integration Guide 19
2: Functional Description
Antenna Type
Peak Gain
Lantronix Part
Vendor
Vendor
Number
PCB Strip Antenna
Without tape backing
1.5 to 2.5dBi, 2.39
Ethertronics
1000668
Swivel type antenna,
2 dBi, 2.4 Ghz to
Ghz
930-033-R-ACC
Wanshih
WSS002
with 50mm cable to
U.FL connector
with RP-SMA(M)
connector
Typical
Ghz to 2.49 Ghz
2.5 Ghz, 2 dBi,
5.15 Ghz to 5.85
Number
(50 piece bulk pack)
Part
Note: The PCB strip antenna is available from Ethertronics, Inc. with or without
adhesive tape backing for mounting to a plastic case. For the component without
tape backing a non-conductive double sided adhesive tape can be used to fix the
antenna in place. The Ethertronics part numbers listed above come with a 50mm
U.FL cable attached to the PCB strip antenna. The 50mm cable length is the
minimum allowed cable length for use with the xPico Wi-Fi embedded device
server. For similar PCB strip antennas with longer cables consult with
Ethertronics, Inc. (www.ethertronics.com).
Lantronix provides a U.FL to Reverse SMA antenna cable in with the evaluation board
and sample kits for development work. These cables can be purchased from Lantronix
for production or supplied by an RF cable manufacturer. External antennas can be
purchased from the antenna vendor. Components for cable design should be selected
for low loss over the entire 2.4Ghz to 5.9Ghz signal range. The cable target impedence
should be 50 ohms.
Figure 2-4 Reverse-SMA to U.FL(long) (Lantronix Part Number 500-180-R)
Figure 2-5 U.FL to U.FL Cable (Lantronix Part Number 500-181-R)
xPico® Embedded Device Server Integration Guide 20
Figure 2-6 Reverse-SMA to U.FL(short) (Lantronix Part Number 500-182-R)
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
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.
2: Functional Description
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
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.
xPico® Embedded Device Server Integration Guide 21
2: Functional Description
Type
Manufacturer
Part Number
Magnetic only (requires RJ45)
BI-Tech
HS91-011-80LFTR
Magnetic only (requires RJ45)
Mingtek
HN0013SG
Combination RJ45/Magnetic
Belfuse
08B0-1D1T-06-F
Combination RJ45/Magnetic
Midcom
MIC2411D-0117T-LF3
Magnetic for POE
PULSE
HX2019
Table 2-7 Recommended Magnetic Modules
and Combo RJ45/Magnetic Module Connectors
The Ethernet differential pair signals, ERX-/ERX+ and ETX-/ETX+ should be routed as
100-ohm differential pairs on a layer next to the signal ground plane. The use of vias on
these signals should be minimized. The center tap signal connections between the
magnetic and xPico (wired) module are required. Center tap signals RCT and TCT
should be routed with at least 20 mil trace thickness. The area between the magnetic
module and RJ45 jack, including the area under both, should be voided of all signals and
planes, except for the signals connecting to both. The signals connecting between the
RJ45 and magnetic are required to be isolated by 1500Vrms from all other signals and
planes, including chassis and signal ground. The connector shield should be connected
to chassis. It is recommended that 1206 resistor pads from chassis ground to signal
ground be placed next to each of the shield tabs. The resistor pads allow for 0 ohm
jumper, ferrite beads, or decoupling caps to be installed as needed for EMI/EMC
improvement.
The Ethernet LED signals should be routed to discrete LEDs or to the LED pins on the
RJ45 through 220 ohm or larger resistors. The LED signals are active low. The Ethernet
LED signals should be isolated from the signals that connect between the RJ45 and
magnetic module.
Also shown in the reference schematic is a recommended TVS array that can be used to
improve ESD and EFT in harsh environments. The device shown is Semtec
RCIamp0502A. This device features route through pin assignments allowing for the
Ethernet differential signal pairs to be routed without altering the trace impedance or
adding vias. Due to this routing, the device could be installed or depopulated as needed.
See the Lantronix app note, How to Connect a Lantronix Embedded Module to a Wired Ethernet Port for more details on Ethernet connection and routing,
The xPico module can also be powered from POE using a POE magnetic and POE
powered device controller. Lantronix uses the Silabs, Si3402 POE controller to power
the xPico development board via POE. If using POE the Ethernet magnetic module
should be changed to a POE compatible module such as Pulse HX2019.
Refer to the evaluation board schematic in the xPico-DevKit_UG for an example circuit.
http://www.lantronix.com/pdf/xPico-DevKit_UG.pdf
.
Refer to the SiLabs data sheet for Si3402 for more information on using the SiLabs POE
controller.
xPico® Embedded Device Server Integration Guide 22
Serial Interface
Signal
Pin
Description
Reset State
TXD1
10
Serial Transmit Data output
Output
RTS1
5
Serial Ready-to-Send / Serial Transmit enable
Output
RXD1
7
Serial Receive Data input
Input
CTS1
16
Serial Clear-to-Send
Input
TXD2
25
Serial Transmit Data output 2
Output
RXD2
23
Serial Receive Data input 2
Input
2: Functional Description
Figure 2-7 Ethernet Connection Example (xPico wired unit only)
The xPico and xPico Wi-Fi embedded device servers have two external serial interfaces.
The signal levels on the serial interface are 3.3V logic level with 5V tolerant inputs. The
serial interfaces require an external transceiver in order to connect to external RS232,
RS485, or RS422 networks. The signals of Serial Port 1 may be connected as shown in
the reference schematic, Figure 2-8 serial port example, below. The transceiver shown
in the reference schematic is of type Exar, part number SP336. This transceiver is a
multiprotocol RS232, RS485, RS422 transceiver. Single protocol transceivers may be
used as required. The xPico interface may also be directly connected to the UART
interface of an external CPU. Serial Port 2 is a three wire interface only. It operates like
Serial Port 1, except it does not support hardware Flow Control (i.e. no RTS/CTS) and
modem control (i.e. no DTR/DCD). It is highly recommended to connect RTS and CTS
for serial port 1.
Table 2-8 xPico and xPico Wi-Fi Serial Port Signals
xPico® Embedded Device Server Integration Guide 23
Note: The IO pins for xPico Wi-Fi embedded device server are set to floating
input on power up until configured by unit firmware. An external 100K ohm pullup may be required on the serial transmit signal to prevent downstream UART
devices from detecting false characters on initial power up.
xPico® Embedded Device Server Integration Guide 24
USB Device Port (xPico Wi-Fi Units Only)
The xPico Wi-Fi embedded device server has one USB2.0 Full Speed Device port
interfaces for connection to an upstream USB device. The port consists of a differential
pair, signals DDP and DDM. These signals should be routed as a 90 ohm differential pair
on a signal layer next to the signal ground plane. The use of vias should be minimized
on these signals. The USB signals can be connected to a USB Mini Type B USB port (as
shown in Table 2-12) directly to an IC with a USB host port. If connecting to an external
port that is user accessible it is recommended to add a TVS diode array to the signal nets
for ESD protection. The ESD array shown in the figure is of type Semtech
RCIamp0502A. This device features through pin routing to minimize trace impedance
changes and simplify routing. The footprint for the TVS array can be added to the PCB
and the part can be depopulated if it is not needed. It is recommended that the power
drawn off the USB Mini Type B connector be limited to less than 500mA per USB
requirements. If the USB device port is unused the DDP and DDM pins may be left
unconnected.
Table 2-11 USB Host Port Signals
2: Functional Description
Pin Name Description Connector
Pins
Signal
Requirement
Mini Type B
USB Device
connector pin
DDP USB Device Port
Positive pin
DDM USB Device Port
Negative pin
5V 5V power from USB
cable
Ground Signal Ground Ground Ground plane 5
Figure 2-9 USB Device Interface Example (xPico Wi-Fi unit only)
22 Route as 90 ohm
differential pair with
DDM signal
24 Route as 90 ohm
differential pair with
DDP signal
Current limit to 500
mA per port
3
2
1
xPico® Embedded Device Server Integration Guide 25
LEDs
Signal
Pin
Description
LED1/WI-FI LED
4
WI-FI Status LED, active low
SYSTEM_LED
20
System status LED, active high
Signal
Pin
Description
LED0/SPEED
6
Ethernet speed LED, active low
LED1/LINK
4
Ethernet Link LED, active low
LED2/ACTIVITY
8
Ethernet Activity LED, active low
LED3/DUPLEX
14
Ethernet Duplex LED, active low
SYSTEM_LED
20
System status LED, active high
Signal
Pin
Description for xPico Wired
Description xPico Wi-Fi
Reset
State
CP1
35
Configurable I/O
Configurable I/O
Input
CP2/INT
input
input
CP3
28
Configurable I/O
Configurable I/O-SPI MISO
Input
CP4
30
Configurable I/O
Configurable I/O-SPI MOSI
Input
CP5
32
Configurable I/O
Configurable I/O
Input
CP6
34
Configurable I/O
Configurable I/O
Input
CP7
27
Configurable I/O
Configurable I/O-SPI Clock
Input
CP8
3
Configurable I/O
Configurable I/O-SPI Chip Select
Input
2: Functional Description
The xPico embedded device server contains several external signals that are intended to
drive external status LEDs. The LEDs are listed below. The signals may be connected
as shown in the reference schematic figure below.
Note: The System LED usually remains on. When the Default button is pressed
for 5-6 seconds, the System LED starts blinking every second to indicate the
default button can be released to complete resetting the unit to factory default.
The unit reboots after release of the Default button. A lit WLAN LED indicates
the STA interface is associated with an access point.
Table 2-12 xPico Wi-Fi Status LED Output Signals
Table 2-13 xPico Status LED Output Signals
General Purpose I/O Pins
xPico and xPico Wi-Fi unit contains eight pins which may be used as configurable inputs
or outputs. Listed below are the configurable I/O pins. These pins are 3.3V CMOS logic
level and 5V input tolerant.
Table 2-14 Ethernet Interface xPico Serial Port Signals
26 Configurable I/O-External interrupt
Note 1. For xPico Wi-Fi 5V tolerant pins, in order to sustain a voltage higher than Vcc+0.3, the internal pull-up/ pull-down resistors must be disabled.
Configurable I/O-SPI interrupt
Input
xPico® Embedded Device Server Integration Guide 26
Reset Pins
Signal
Pin
Description
Reset
State
Internal pull-up
EXT_RESET#
38
Unit hardware reset, active low. Assert
be left floating.
Input
10K (xPico unit)
DEFAULT#
36
Unit reset to default, active low.
established.
Input
Active 56K to
WAKE (xPico
14
Toggle signal from low to high can wake
configuration settings.
Input
40K
The xPico and xPico Wi-Fi embedded device servers have two signals for use as reset
signals. Signal EXT_RESET# is a hardware controlled input signal that will reboot the
xPico processor when asserted low. Signal DEFAULT# is polled by the xPico software.
When DEFAULT# is asserted low for six seconds, the unit will reset the system to the
default manufacturing settings and reboot the unit. xPico Wi-Fi embedded device server
has an additional signal on pin 14 that can be used to wake up the unit processor when
the unit is in a sleep or power down state.
2: Functional Description
Table 2-15 xPico Reset Signals
Wi-Fi unit only)
low for a minimum of 50 milliseconds,
then release to reboot unit. Signal may
•For wired xPico units
Drive low and reboot the device to
reset unit to factory defaults.
•For xPico Wi-Fi units
While device is running, drive low for
greater than 6 seconds, then release
to reset unit to factory defaults. While
device is held in reset, drive low,
release reset to boot device with Line 1
CLI default settings (original
configuration is preserved), then
release after CLI session is
device from Sleep or Standby mode.
Hold low to allow device to enter Sleep
or Standby mode. Subject to
40K (xPico Wi-Fi
unit)
122K (xPico unit)
40K (xPico Wi-Fi
unit)
xPico® Embedded Device Server Integration Guide 27
2: Functional Description
xPico® Embedded Device Server Integration Guide 28
Evaluation Board Schematics
Figure 2-10 Evaluation Board Schematic, Part 1 of 5
2: Functional Description
xPico® Embedded Device Server Integration Guide 29
Figure 2-11 Evaluation Board Schematic, Part 2 of 5
2: Functional Description
xPico® Embedded Device Server Integration Guide 30
Figure 2-12 Evaluation Board Schematic, Part 3 of 5
2: Functional Description
xPico® Embedded Device Server Integration Guide 31
Figure 2-13 Evaluation Board Schematic, Part 4 of 5
2: Functional Description
xPico® Embedded Device Server Integration Guide 32
Figure 2-14 Evaluation Board Schematic, Part 5 of 5
3: Mounting Instructions and PCB Footprint
3. Mounting Instructions and PCB Footprint
The xPico embedded device server dimensions and mounting instructions are shown in
the following drawings below. You may also directly access the CAD files through the
Lantronix website.
Note: The mounting instructions in this section are applicable to both the xPico
and the xPico Wi-Fi embedded device servers though the xPico pictures below
are used to demonstrate installation.
For temperature environments up to +85° Celsius, it is recommended that the
mating PCB have its outer layers flooded with signal ground and a heat pad be
placed between the module and mating PCB. The recommended heat pad is
Lantronix part number XPC100A002-01-B. The ground flooding and heat pad
are only required for xPico Wi-Fi units in environments above +70°C. For
environments below +70°C the heat pad and ground flooding are not required.
To Access CAD Files
1. Go to http://www.lantronix.com/products/cad-visio.html.
2. Click Download CAD fileshere to access the Registration Form.
Figure 3-1 White Mounting Quick Clip Dimensions
xPico® Embedded Device Server Integration Guide 33
3: Mounting Instructions and PCB Footprint
Module/Mounting
White
Module
To Install the xPico or xPico Wi-Fi Module
In the xPico embedded device server development kit (part number XPC100100K-02)
and xPico Wi-Fi development kit (XPW100100K-01), the xPico module comes installed to
the xPico Evaluation Board via the connector J1 (Hirose component). If ordered
separately, you may need to install it by following the directions below. The included
white Mounting Quick Clip is used to align and fasten the module to the evaluation board.
1. Place the module into the white mounting clip, lining up the clip legs and the four
module grooves so that the module is seated inside the white clip. For xPico Wi-Fi
unit connect the RF cable to the module U.FL connector prior to installing the Quick
Clip.
Mounting Clip
xPico/xPico Wi-Fi
2. Push the legs of the white clip inward to secure the module to the clip.
3. Flip over the module/mounting clip combination so that the product label displays on
top and the white mounting clip legs are pointed downward.
4. For xPico Wi-Fi embedded device server high temperature operation, above +70C, it
is recommended to place a heat pad between the module and the adjacent PCB. The
recommended heat pad is Lantronix part number XPC100A002-01-B (available in a 50
piece bulk pack).
5. Place the module/mounting clip combination so that the four mounting clip legs align
with the four standoff holes on the board surrounding the J1 connector
(see Figure 3-2). Make sure to properly orientate the module/mounting clip
combination on the board, so that the J1 connector/Hirose component is properly
aligned.
Clip Combination
xPico® Embedded Device Server Integration Guide 34
3: Mounting Instructions and PCB Footprint
Figure 3-2 Aligning Mounting Clip Legs to Standoff Holes
6. Insert the white clip legs furthest from the J1 connector first and gently push down on
the xPico module above the J1 connector. Keep the module as level as possible
during installation.
Note: When removing the xPico embedded device server from the evaluation
board, gently tug the module. Do not use excessive force or attempt to remove
the xPico module by grasping and pulling the module from the short end opposite
the module connector as this may cause damage to the J1 evaluation board
connector.
xPico® Embedded Device Server Integration Guide 35
3: Mounting Instructions and PCB Footprint
Figure 3-3 Mounting Instructions for PEM Standoff
xPico® Embedded Device Server Integration Guide 36
3: Mounting Instructions and PCB Footprint
Figure 3-4 Hirose Connector Layout
xPico® Embedded Device Server Integration Guide 37
Product Information Label
Part Number
Date Code
Product Model
Country of Origin
Revision
MAC Address
Product Model
FCC Radio ID
Part Number
Japan Radio Equipment Mark
Japan Telecommunication Mark
Canada Radio ID
Manufacturing Date Code
Revision Number
The product information label contains important information about your specific unit,
such as its part number, revision, manufacturing date code, product model, country of
origin, datamatrix barcode and MAC address.
3: Mounting Instructions and PCB Footprint
Figure 3-5 xPico Product Label
Manufacturing
Lantronix
Datamatrix
Barcode
Figure 3-6 xPico Wi-Fi Product Label
Japan Certification Number
Lantronix Datamatrix Barcode
xPico® Embedded Device Server Integration Guide 38
Serial Number Country of Origin
4. Specifications
Parameter
Symbol
Min
Max
Units
Supply Voltage
VCC 0 3.6
Vdc
Operating Temperature
-40
85
°C
Storage Temperature
-40
85
°C
Parameter
Symbol
Min
Typical
Max
Units
Supply Voltage
VCC
3.15
3.3
3.46
Vdc
Supply Voltage Ripples
V
CC_PP
2
%
100 BaseTX Active (Normal CPU Speed)
ICC
200
mA
10 BaseT Active (Normal CPU Speed)
ICC
220
mA
No Link (Normal CPU Speed)
ICC
150
mA
100 BaseTX Active (High CPU Speed)
ICC
240
mA
10 BaseT Active (High CPU Speed)
ICC
260
mA
No Link (High CPU Speed)
ICC
190
mA
100 BaseTX Active (Low CPU Speed)
ICC
170
mA
10 BaseT Active (Low CPU Speed)
ICC
190
mA
No Link (Low CPU Speed)
ICC
120
mA
Supply Reset Threshold
V
RST
2.7
Vdc
CPx Pull-ups, except CP5, CP6
RPU
56 122
Kohm
CP5,CP6 Pull-up
RPU 10 Kohm
CPx, RX
Input Low Voltage
V
0.8
Vdc
CPx, RX
Input High Voltage
V
2 5.5
Vdc
CPx, TX Output Low Voltage
(IOL = 4 mA)
V
0.4
Vdc
CPx, TX Output High Voltage
(IOH = -4 mA)
V
2.4
Vdc
Reset Pin Low Voltage
VRES_IL
0.36
Vdc
Reset Pin High Voltage
VRES_IL
2.0 3.46
Vdc
Electrical Specifications
Caution: Stressing the device above the rating listed in this table may cause
permanent damage to the xPico embedded device server. Exposure to Absolute
Maximum Rating conditions for extended periods may affect the xPico unit’s
reliability. For xPico Wi-Fi operation above +70° Celsuis, it is recommended that a
heat pad be placed between the module and mating PCB.
Note 1. For xPico Wi-Fi 5V tolerant pins, in order to sustain a voltage higher than Vcc+0.3, the internal pullup/pull-down resistors must be disabled.
xPico® Embedded Device Server Integration Guide 40
Technical Specifications
Category
Description
CPU, Memory
Lantronix DSTni-EX 186 CPU, 256-Kbyte zero wait state SRAM, 512Kbyte flash, 16-Kbyte boot ROM
Firmware
Upgradeable via TFTP and serial port
Reset Circuit
Internal 200ms power-up reset pulse. Power-drop reset triggered at 2.6V.
External reset input causes an internal 200ms reset.
Serial Interface
CMOS (Asynchronous) 3.3V-level signals
Rate is software selectable: 300 bps to 921600 bps
Serial Line Formats
Data bits: 7 or 8 Stop bits: 1 or 2 Parity: odd, even, none
Modem Control
DTR/DCD, CTS, RTS <- Serial 1 only
Flow Control
Serial 1: XON/XOFF (software), CTS/RTS (hardware)
Serial 2: XON/XOFF (software)
Programmable I/O
8 PIO pins (software selectable), sink or source 4mA max.
Network Interface
10/100Mbps Ethernet, requires external magnetics and RJ45
Compatibility
Ethernet: Version 2.0/IEEE 802.3 (electrical), Ethernet II frame type
Protocols Supported
ARP, UDP/IP, TCP/IP, Telnet, ICMP, SNMP, DHCP, BOOTP, TFTP, Auto
IP, SMTP, and HTTP
LEDs
Link, Activity, Link Speed, Duplex, System Status logic level outputs
Management
Internal web server, SNMP (read only) Serial login, Telnet login