Lantronix xPico User manual

Part Number 900-643-R
Revision A August 2012
xPico
Development Kit User Guide

xPico Development Kit User Guide 2
Copyright and Trademark
© 2012 Lantronix, Inc. All rights reserved. No part of the contents of this book may be
transmitted or reproduced in any form or by any means without the written permission of
Lantronix.
Lantronix® is a registered trademark and xPico™ is a trademark of Lantronix, Inc.
Ethernet is a trademark of XEROX Corporation. Windows is a trademark of Microsoft Corporation.
Warranty
For details on the Lantronix warranty policy, please go to our Web site at
www.lantronix.com/support/warranty.
Contacts
Lantronix, Inc.
167 Technology Drive
Irvine, CA 92618, USA
Phone: [phone]
Fax: [phone]
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 and Revisions
Note: This product has been designed to comply with the limits for a Class B digital
device pursuant to Part 15 of FCC and EN55022 Rules when properly enclosed and
grounded. These limits are designed to provide reasonable protection against radio
interference in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy, and if not installed and used in accordance with this
guide, may cause interference to radio communications. Changes or modifications to
this device not explicitly approved by Lantronix will void the user's authority to
operate this device. The information in this guide may change without notice. The
manufacturer assumes no responsibility for any errors that may appear in this guide.
Revision History
Date Rev. Comments
August 2012
A
Initial Document.

xPico Development Kit User Guide 3
Table of Contents
Copyright and Trademark _________________________________________________ 2
Warranty ______________________________________________________________ 2
Contacts ______________________________________________________________ 2
Disclaimer and Revisions _________________________________________________ 2
Revision History ________________________________________________________ 2
Table of Contents _______________________________________________________ 3
List of Figures __________________________________________________________ 4
List of Tables___________________________________________________________ 4
1. Introduction 5
About this Guide ________________________________________________________ 5
Additional Documentation _________________________________________________ 5
2. Development Kit 6
Contents of the Kit_______________________________________________________ 6
Evaluation Board Description ______________________________________________ 6
Serial Port 1 and 2 RS232/RS485 Interfaces __________________________________ 9
Ethernet Port __________________________________________________________ 12
Power Supply _________________________________________________________ 12
LEDs ________________________________________________________________ 14
Additional Headers _____________________________________________________ 15
Evaluation Board Schematic______________________________________________ 16

xPico Development Kit User Guide 4
List of Figures
Figure 2-1 xPico Evaluation Drawing_______________________________________ 7
Figure 2-2 JP11 and JP12 Headers_______________________________________ 10
Figure 2-3 JP8, JP9, and JP10 Headers ___________________________________ 11
Figure 2-4 JP13 Header________________________________________________ 12
Figure 2-5 Evaluation Board Schematic, Part 1 of 5 __________________________ 16
Figure 2-6 Evaluation Board Schematic, Part 2 of 5 __________________________ 17
Figure 2-7 Evaluation Board Schematic, Part 3 of 5 __________________________ 18
Figure 2-8 Evaluation Board Schematic, Part 4 of 5 __________________________ 19
Figure 2-9 Evaluation Board Schematic, Part 5 of 5 __________________________ 20
List of Tables
Table 2-1 Evaluation Board Connectors, Header and Switches __________________ 7
Table 2-2 RS-232 Signals on J3 and J4 Serial Ports __________________________ 9
Table 2-3 RS-422 4-Wire Signals on Serial Ports (J3 only) _____________________ 9
Table 2-4 RS-485 2-Wire Signals on Serial Ports(J3 only) ______________________ 9
Table 2-5 JP11 and JP12 Jumper Settings for Serial Port 1 (J3) ________________ 10
Table 2-6 JP8 and JP9 Port 1 DB9 Serial or USB/Serial Selection Headers _______ 11
Table 2-7 JP10 Serial Port 1 Flow Control Break Out Header __________________ 11
Table 2-8 JP13 Serial Port 2 Break Out Header _____________________________ 12
Table 2-9 Evaluation Board Power Options ________________________________ 13
Table 2-10 LEDs Signals _______________________________________________ 14
Table 2-11 Additional Headers __________________________________________ 15

xPico Development Kit User Guide 5
1. Introduction
About this Guide
This guide provides the information needed to use the xPico with the Development Kit. The
intended audience is the engineers responsible for integrating the xPico into their product.
Notes:Everything required to evaluate the CoBos OS-based turnkey application is provided
in the development kit. See Contents of the Kit.
Additional Documentation
Visit the Lantronix web site at www.lantronix.com/support/documentation for the latest
documentation and the following additional documentation.
Document Description
xPico Development Kit
Quick Start Guide
Instructions for getting the xPico module up and running on the
evaluation board.
xPico Integration Guide Provides information for integrating the xPico module on a
customer platform.
xPico Product Brief Provides a quick reference to xPico technical specifications.
xPico User Guide Provides information needed to configure, use, and build CoBos
applications on the xPico.

xPico Development Kit User Guide 6
2. Development Kit
Using an xPico sample and the xPico Development Kit, you can get familiar with the product
and understand how to integrate the xPico into a given product design.
Contents of the Kit
The xPico Development Kit contains the following items:
♦xPico Module
♦xPico Evaluation Board
♦5V Wall Adaptor
♦xPico Mounting Quick Clip
♦RS-232 Cable, DB9F/F, Null Modem
♦CAT5 Ethernet Cable
♦40-pin Connector Sample
Evaluation Board Description
The xPico evaluation board provides a test platform for the Lantronix xPico device server
products. The evaluation board uses either 5V power from a USB device port connector or
power supplied to the Ethernet connector via PoE. The Development Kit includes a 5V wall
adapter with a USB plug to allow powering the evaluation board from a standard power strip.
The evaluation board includes all necessary regulators to power the 3.3V xPico module. The
evaluation board has the following features:
♦Two DB9 serial port connectors with one driven by a multi-protocol RS232, RS422,
RS485 transceiver at rates up to 1Mbps. The second DB9 is driven by an RS232
transceiver. Serial port modes are configured by on-board jumpers.
♦One RJ45 10/100 Ethernet port with an integrated PoE regulator to allow powering from
standard PoE PSE.
♦One Mini-Type B USB device port connector for 5V input power.This port also has an
integrated USB-to-serial converter. The USB-to-serial converter can be connected to the
xPico serial port via a board jumper setting.
♦LEDs for the xPico Ethernet and System status outputs along with two additional LEDs
that can be driven via jumper wire.
♦Access to all logic level IO signals on the xPico via header pins for measurements and
connections to other places.
The figure below shows the xPico evaluation board and highlights all of the various
connectors and configuration jumpers. The following table lists each of the connectors and
jumper headers along with their function. Further description and pin assignments are
included in subsequent sections.

2: Development Kit
xPico Development Kit User Guide 7
Figure 2-1 xPico Evaluation Drawing
Table 2-1 Evaluation Board Connectors, Header and Switches
Ref Des. Connector/Header Function
J1 xPico Module Socket
40 pin socket for xPico module
J2 RJ45 Connector
10/100Mbps Ethernet connector. PoE powered device port.
J3 Serial Port 1 DB9
Standard RS232/RS422/RS485 DB9 serial port connector.
J4 Serial Port 2 DB9
Standard RS232 DB9 serial port connector.
J5 Mini USB Connector
Standard USB device port that can be used to power the evaluation board or drive the
evaluation board USB-to-serial converter.
JP1 Module Power Jumper
Power connection to the module
JP3 Default Button Jumper
Allows access to module reset to default signal and SW1 push button. Install to use
SW1 as reset to default button.
JP4 HW Reset Button Jumper
Allows access to module HW reset signal and SW2 push button. Install to use SW2 as
HW reset button.

2: Development Kit
xPico Development Kit User Guide 8
Ref Des. Connector/Header Function
JP5 Configurable Pin Header
Provides access to xPico module configurable pins CP1 to CP8
JP6 Ethernet LED Header
Allows access to Ethernet LED signals. Install to drive evaluation board Ethernet LEDs
with module LED signals.
JP7 Spare LED Header
Provides two additional LEDs. Jumper to desired active low signal to light LED6 and
LED7
JP8 Serial Port 1 TX Source Header
Install jumper to select between DB9 serial port or USB-to-serial.
JP9 Serial Port 1 RX Source Header
Install jumper to select between DB9 serial port or USB-to-serial.
JP10 Serial Port 1 Breakout Header
Install jumpers to connect xPico Serial Port 1 flow control signals to the
RS232/RS422/RS485 transceiver for Serial Port 1.
JP11 Serial Port 1 RS232/RS422/RS485 Mode Jumper
Leave open for RS232 mode. Install for RS422/RS485
JP12 Serial Port 1 RS422/RS485 Mode Jumper
Leave open for RS232 or 4-wire mode. Install for 2-wire mode.
JP13 Serial Port 2 Breakout Header
Install jumpers to connect xPico Serial Port 2 TX/RX and configurable pins to the RS232
transceiver for Serial Port 2.
JP14 3.3V Power Header
Provides access to the internal 3.3V power rail.
JP15 Ground Header
Provides access to the internal signal ground rail.
SW1 Module Reset to Default
When pushed asserts the xPico module reset to default function.
SW2 Module Hardware Reset
When pushed asserts the xPico module hardware reset to reboot the module.
SW3 Board Power Switch
Switches ON or OFF the logic power rails.

2: Development Kit
xPico Development Kit User Guide 9
Serial Port 1 and 2 RS232/RS485 Interfaces
The evaluation board has one multiprotocol RS-232/RS422/RS485 port and one RS232 port
for connection to the xPico internal UARTs. The ports are DB9 type connectors labeled J3
and J4. Included with the kit is a DB9-to-DB9 null modem cable (Lantronix P/N 500-164-R).
The null modem cable can be used to connect either J3 or J4 directly to a standard PC
RS232 serial port.
The tables below list the RS232/RS422/RS485 signals and corresponding pins on the
evaluation board DB9 connectors. All signals at J3 are level-shifted by a multiprotocol
transceiver. J4 is an RS232 port only.
Table 2-2 RS-232 Signals on J3 and J4 Serial Ports
xPico Evaluation Board
PIN FUNCTION
DB9
Pin #
Serial Port
TX_232 (Data Out)
3
RX_232 (Data In)
2
CTS_232 (HW Flow Control Input)
8
RTS_232 (HW Flow Control Output)
7
DTR_232 (Modem Control Output)
4
GND (Ground) 5
Table 2-3 RS-422 4-Wire Signals on Serial Ports (J3 only)
xPico Evaluation Board
PIN FUNCTION
DB9
Pin #
Serial Port
TX- (Data Out)
3
RX+ (Data In)
2
TX+ (Data Out)
7
RX- (Data In)
4
GND (Ground)
5
Table 2-4 RS-485 2-Wire Signals on Serial Ports(J3 only)
xPico Evaluation Board
PIN FUNCTION
DB9
Pin #
Serial Port
TX-/RX- (Data IO)
3
TX+/RX+ (Data IO)
7
GND (Ground)
5
The J3 DB9 port is configured for RS232, RS422 (4-wire), or RS485 (2-wire) by jumper
settings on JP11 and JP12. Table 2-5 lists the correct jumper installation for each mode.

2: Development Kit
xPico Development Kit User Guide 10
Table 2-5 JP11 and JP12 Jumper Settings for Serial Port 1 (J3)
xPico Evaluation Board
Serial Port 1 Mode (J3)
JP11 JP12
RS232
OUT
OUT
RS485 2-wire IN IN
RS422 4-wire
IN
OUT
Figure 2-2 JP11 and JP12 Headers
All of the xPico module serial port signals can be used as configurable pins. Jumper headers
JP10 and JP13 have been included to allow for each of the serial port signals to be
connected or disconnected from the serial port transceiver. The tables below list the JP10
and JP13 serial port signal connections. Install jumper or remove as needed for desired
function. In addition, the first serial port on the xPico module can be connected to either the
DB9 serial port on J3 or to the USB on J5 via the on board USB-to-serial converter. Jumpers
JP8 and JP9 allow for the selection of sending the J3 DB9 or J5 USB-to-Serial Port 1.
In order to access the unit through the J5 USB port, you will need to install the USB-to-serial
VCP driver from FTDI on your PC. It is available in the installation directory of DeviceInstaller
4.3.0.2 and later versions, for installation. It can also be obtained from the FTDI website
provided below. Once installed, you will be able to view the xPico boot messages as well as
provide command inputs through any PC terminal program, such as Tera Term.
Download FTDI USB-to-serial drivers at this website:
http://www.ftdichip.com/Drivers/VCP.htm
JP12
JP11