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

2: Development Kit
xPico Development Kit User Guide 11
Table 2-6 JP8 and JP9 Port 1 DB9 Serial or USB/Serial Selection Headers
Serial Port 1 External Connection JP8 JP9
Serial Port 1 to J3 DB9 for RS232/RS422/RS485
Jumper pins 1 to 2
Jumper pins 1 to 2
Serial Port 1 to J5 USB via USB-to-serial converter Jumper pins 2 to 3 Jumper pins 2 to 3
Figure 2-3 JP8, JP9, and JP10 Headers
Table 2-7 JP10 Serial Port 1 Flow Control Break Out Header
xPico
Module
J1 Pin
xPico Module
PIN FUNCTION
JP10
Pin #
JP10
Pin #
JP3 Evaluation Board
Function
5 Serial port RTS1 or TX enable or configurable
pin
1 2 RS232 RTS, RS485 TX Enable
16
Serial port CTS1 or configurable pin
5
6
RS232 CTS
28
Configurable pin CP3 or Serial port DTR1
3
4
RS232 DTR
30
Configurable pin CP4 or Serial port DCD1
7
8
RS232 DCD
JP8
Pin 1
JP9
Pin 1
JP10
Pin 1
JP10
Pin 2

2: Development Kit
xPico Development Kit User Guide 12
Table 2-8 JP13 Serial Port 2 Break Out Header
xPico
Module
J1 Pin
xPico Module
PIN FUNCTION
JP13
Pin #
JP13
Pin #
J4 Evaluation Board
Function
25
Serial port TX2 or configurable pin
1
2
RS232
23 Serial port RX2 or configurable pin 5 6 RS232
3
CP8, Serial port RTS2
3
4
RS232 RTS
27
CP7, Serial port CTS2
7
8
RS232 CTS
Figure 2-4 JP13 Header
Ethernet Port
The xPico evaluation board includes one RJ45 with on-board magnetics for connection to the
xPico module 10/100Mbps Ethernet interface. Connector J2 is the Ethernet port.
Power Supply
The evaluation board provides several options for input power. Included with the kit is a 5V
wall adapter. The 5V wall adapter plugs into USB connector J5.In addition to powering from
the wall adapter, the evaluation board can be powered from a standard PC USB Host port by
connecting a USB cable between the PC and J5. The evaluation board can also be powered
via Power-Over-Ethernet (PoE). The integrated PoE regulator accepts power from the
Ethernet port on J2.
JP13
Pin 1
JP13
Pin 2

2: Development Kit
xPico Development Kit User Guide 13
Table 2-9 Evaluation Board Power Options
Input Power Option Description
5V Wall Cube Connect 5V wall cube to J5 USB port.
Note: USB-to-serial not available in this option.
USB Host Port Connect J5 USB power to a PC USB Host Port.
Note: Host port can communicate with serial port via on-board USB-to-
serial converter. See Table 2-1 for JP8 and JP9 jumper pin selection.
PoE
Connect J2 Ethernet port to external PoE PSE switch or PoE injector

2: Development Kit
xPico Development Kit User Guide 14
LEDs
The xPico evaluation board includes several LEDs for signal and unit status. The table below
lists all of the LEDs and their function.
Table 2-10 LEDs Signals
J1
Pin
LED Ref
Design
Color LED Function
20 LED1 Orange xPico Status
LED blinks with patterns indicating module status. See the xPico user
guide for a full description of the status LED blink patterns.
4 LED2 Orange Ethernet Link
LED is ON when the Ethernet port has a valid link
6 LED3 Orange Ethernet Speed
LED is ON when Ethernet is in 100Mbps mode
8 LED4 Orange Ethernet Activity
LED blinks when there is activity on the Ethernet port
14 LED5 Orange Ethernet Duplex
LED is ON when Ethernet is in half duplex mode
LED6 Orange Spare LED
LED is ON when JP7 pin 1 is driven low
LED7 Orange Spare LED
LED is ON when JP7 pin 2 is driven low.
10 LED8 Green Serial Port 1 TX Activity
LED is ON for activity on the Serial Port 1 transmit line
7 LED8 Orange Serial Port 1 RX Activity
LED is ON for activity on the Serial Port 1 receive line
25 LED9 Green Serial Port 2 TX Activity
LED is ON for activity on the Serial Port 2 transmit line
23 LED9 Orange Serial Port 2 RX Activity
LED is ON for activity on the Serial Port 2 receive line
LED10 Blue 3.3V Power LED
LED is ON when the evaluation board power supply is generating 3.3V

2: Development Kit
xPico Development Kit User Guide 15
Additional Headers
The table below lists the pin functionality of the additional evaluation board headers.
Table 2-11 Additional Headers
J1 Pin Header
Pin
Signal Function
36 JP3 pin 1 Module reset to defaults
(active low)
Install jumper (JP3 pins 1 to 2) to use
SW1 for asserting default function.
38 JP4 pin 1 Module hardware reset
(active low)
Install jumper (JP4 pins 1 to 2) to use
SW2 for asserting hardware reset.
35
JP5 pin 1
CP1, configurable pin
Test point
26
JP5 pin 2
CP2, configurable pin
Test point
28
JP5 pin 3
CP3, configurable pin
Test point
30
JP5 pin 4
CP4, configurable pin
Test point
32
JP5 pin 5
CP5, configurable pin
Test point
34
JP5 pin 6
CP6, configurable pin
Test point
27
JP5 pin 7
CP7, configurable pin
Test point
3
JP5 pin 8
CP8, configurable pin
Test point

xPico Development Kit User Guide 16
Evaluation Board Schematic
Figure 2-5 Evaluation Board Schematic, Part 1 of 5

2: Development Kit
xPico Development Kit User Guide 17
Figure 2-6 Evaluation Board Schematic, Part 2 of 5

2: Development Kit
xPico Development Kit User Guide 18
Figure 2-7 Evaluation Board Schematic, Part 3 of 5

2: Development Kit
xPico Development Kit User Guide 19
Figure 2-8 Evaluation Board Schematic, Part 4 of 5

2: Development Kit
xPico Development Kit User Guide 20
Figure 2-9 Evaluation Board Schematic, Part 5 of 5