Lantronix Micro125 Quick setup guide

Part Number 900-587
Revision C December 2015
Micro125
Embedded Device Server
Integration Guide

Micro125 Embedded Device Server Integration Guide 2
Copyright and Trademark
© 2015 Lantronix, Inc. All rights reserved. No part of the contents of this publication may
be transmitted or reproduced in any form or by any means without the written permission
of Lantronix. Printed in the United States of America.
Lantronix is a registered trademark of Lantronix, Inc. in the United States and other
countries. DeviceInstaller is a trademark of Lantronix, Inc.
Patented: patents.lantronix.com; Additional patents pending.
Ethernet is a trademark of XEROX Corporation. UNIX is a registered trademark of The
Open Group. Windows is a trademark of Microsoft Corporation.
Contacts
Lantronix Corporate Headquarters
7535 Irvine Center Drive
Suite 100
Irvine, CA 92618, USA
Toll Free: 800-526-8766
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
Operation of this equipment in a residential area is likely to cause interference, in which
case the user, at his or her own expense, will be required to take whatever measures
may be required to correct the interference.
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 which may appear in this guide.
Date
Rev.
Comments
March 2011
A
Initial Release
April 2011
B
Updated serial interface information.
December 2015
C
Updated reset input tolerance information.

Micro125 Embedded Device Server Integration Guide 3
Contents
Copyright and Trademark .............................................................................................2
Contacts........................................................................................................................2
Disclaimer and Revisions..............................................................................................2
List of Figures................................................................................................................4
List of Tables.................................................................................................................4
1: Introduction 5
Embedded Integration Kits............................................................................................5
About the Integration Guide..........................................................................................5
Chapter Summaries......................................................................................................6
Additional Documentation.............................................................................................6
2: Description and Specifications 7
The Micro125................................................................................................................7
Layout and Dimensions ................................................................................................8
Connectors....................................................................................................................9
Ethernet Interface........................................................................................................10
Status LEDs ................................................................................................................11
Product Information Label...........................................................................................12
Technical Specifications .............................................................................................12
3: Integration Guidelines 14
Power Supply..............................................................................................................14
Network Connector .....................................................................................................14
Virtual Ground.............................................................................................................15
Serial Signals..............................................................................................................15
Additional Emission Improvements.............................................................................15
4: Test Bed 16
Board Layout...............................................................................................................16
Test Bed Connectors ..................................................................................................17
A: Compliance and Warranty Information 18
Compliance Information..............................................................................................18
RoHS Notice.........................................................................................................19
Warranty......................................................................................................................19

Micro125 Embedded Device Server Integration Guide 4
List of Figures
Figure 2-1 Micro125 Board Layout ...............................................................................................................8
Figure 2-2 Micro125 Top View......................................................................................................................8
Figure 2-3 Micro125 Connector End View....................................................................................................9
Figure 2-4 Micro125 Connectors ..................................................................................................................9
Figure 2-5 RJ45 Ethernet Connector..........................................................................................................10
Figure 2-6 Micro125 Status LEDs...............................................................................................................11
Figure 2-7 Product Label.............................................................................................................................12
Figure 3-1 Multi-Layer Board Strategy........................................................................................................15
Figure 4-1 Carrier Board.............................................................................................................................16
Figure 4-2 Pin Configurations .....................................................................................................................17
List of Tables
Table 1-1 Micro125 Part Numbers................................................................................................................5
Table 2-1 Micro125 Connector Pinouts ......................................................................................................10
Table 2-2 Micro125 Status LEDs................................................................................................................11
Table 2-3 Micro125 Technical Specifications .............................................................................................12
Table 4-1 Micro125 Test Bed Connectors..................................................................................................17

Micro125 Embedded Device Server Integration Guide 5
1: Introduction
Embedded Integration Kits
The Embedded Integration Kit provides a simple method of evaluating our Micro125
embedded device server. This product allows software engineers to test our device
servers with their products prior to the hardware development of those products.
Each kit contains an embedded device server, board carrier unit, and all the connectors
needed to interface our product with your serial device.
The Embedded Integration Kits include the following:
An embedded device server: Micro125
Board carrier unit with serial (DB9) interface. (Some carriers also have RJ45
Ethernet)
Power supply
CAT5 Ethernet cable, RJ45M/M, 10-foot
10-foot serial cable, DB9 (cable end depends on kit)
DB9 to DB-25 converter
About the Integration Guide
This guide provides the information needed to install and test the Micro125 embedded
device server on the Evaluation Board. The intended audience is the engineer
responsible for integrating the device server into your product.
This document covers the following Micro125 Device Server part numbers:
Table 1-1 Micro125 Part Numbers
Part Number
Description
MO00AA003-01R
Micro125, No RJ45 connector, No LEDS, with TTL pin header, RoHS
MO00AA0E3-01R
AES Encrypted Micro125, No RJ45 connector, No LEDS, with TTL pin
header, RoHS
MO11AA003-01R
Micro125 with RJ45 connector, LEDS, with TTL pin header, RoHS
MO11AA0E3-01R
AES Encrypted Micro125 with RJ45 connector, LEDS, with TTL pin
header, RoHS
MO22AA003-01R
Micro125, Pin header for Ethernet, Pin header for LED connection,
with TTL pin header, RoHS
MO22AA0E3-01R
AES Encrypted Micro125, Pin header for Ethernet, Pin header for LED
connection, with TTL pin header, RoHS

1: Introduction
Micro125 Embedded Device Server Integration Guide 6
Chapter Summaries
The remaining chapters in this guide include:
Chapter
Description
2: Description and
Specifications
Describes and provides information about the Micro125
device server.
3: Integration Guidelines
Provides general guidelines to help you integrate the
Micro125 board into your design.
4: Test Bed
Describes the board layout and connectors of the test bed.
A: Compliance and Warranty
Information
Describes the compliance and warranty information.
Additional Documentation
Visit the Lantronix website at www.lantronix.com/support/documentation for the latest
documentation and the following additional documentation.
Document
Description
Micro125 User Guide
Provides information needed to configure, use, and update
the Micro125 firmware.
Device Installer User
Guide
Provides instructions on using the Windows-based utility
used to configure Lantronix embedded device servers.
Com Port Redirector
User Guide
Provides information on using the Windows-based utility to
create a virtual com port.

Micro125 Embedded Device Server Integration Guide 7
2: Description and Specifications
The Micro125 embedded device server provides an integrated solution to add proven
Ethernet connectivity to an existing design quickly and economically, and with a high
level of flexibility.
The Micro125
The Micro125 contains Lantronix’s own DSTni controller, with 256 Kbytes of SRAM,
16 Kbytes of boot ROM, and an integrated 10/100 PHY.
The Micro125 also contains the following:
RJ45 (10/100Base-T) ethernet network interface
TTL level (asynchronous) serial interface
Two serial ports
Accepts 5 VDC regulated Input power
Flash ROM for easy software upgrades
Serial channel status, Ethernet link status, and diagnostic LEDs
The Micro125 requires 5 VDC ±5% at ~ 210mA power and is designed to operate in an
extended temperature range (see Technical Specifications on page Error! Bookmark
not defined.).

2: Description and Specifications
Micro125 Embedded Device Server Integration Guide 8
Layout and Dimensions
The Micro125 integrates into products quickly and easily. Serial interfacing is
accomplished via a TTL connector, and for Ethernet access, an optional RJ45
(10/100Base-T) connector is available. The orientation of its interface pins can be
specified to fit your product. It requires 5 volts DC of regulated power with maximum
current of 210mA.
Figure 2-1 Micro125 Board Layout
The following drawing is a top view of the Micro125.
Figure 2-2 Micro125 Top View

2: Description and Specifications
Micro125 Embedded Device Server Integration Guide 9
The following drawing shows the connector end view of the board with the LEDs and
RJ45 connector installed. The drawing on the right shows the dimensions for CON1 (DIL
2 x 6).
Figure 2-3 Micro125 Connector End View
Connectors
The Micro125 has four connectors: a TTL serial port (CON1), a 10/100Base-T RJ45
Connector (CON2), and/or pins instead of the RJ45 connector (CON3) and LEDs
(CON4).
Figure 2-4 Micro125 Connectors
CON1
(TTL)
111
212
CON2
(RJ45) CON3
12
34
12
78
S1
CON4
(LEDs)
The Micro125 that comes with the integration kit is factory configured. When ordering the
Micro125 for production use, each connector can be specified as follows:
Pins on/off the board and top/bottom (Figure 2-2 and Figure 2-3)
LEDs on/off the board
RJ45 on/off the board
Contact Lantronix for information about ordering the Micro125 with customized connector
configurations.
The Embedded Integration Kit (part number Micro-Kit) includes the Micro125 embedded
device server. Refer to the following table for a listing of its pinouts.

2: Description and Specifications
Micro125 Embedded Device Server Integration Guide 10
Table 2-1 Micro125 Connector Pinouts
CON1
TTL Serial Port
(DIL 2 x 6 Pins)
CON2
10/100Base-T
(RJ45) Connector
CON3 (2 x 2 Pins
in place of RJ45)
CON4 (2 x 4 Pins in place
of LEDs)
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
1
+5VDC
1
Tx+
1
Tx+
1
+3.3 VDC
2
GND
2
Tx-
2
Tx-
2
+3.3 VDC
3
RxA (input)
3
Rx+
3
Rx+
3
LED3
(Diagnostics)1
4
TxA (output)
4
None 2
(tied to Pin
5)
4
Rx-
4
LED1 (Channel 1)1
5
RTSA (output)
5
None (tied
to Pin 4)
5
+3.3 VDC
6
DTRA (output)
6
Rx-
6
+3.3 VDC
7
CTSA (input)
7
None (tied
to Pin 8)
7
LED2 (Channel 2)1
8
DCDA (input)
8
None (tied
to Pin 7)
8
LED4 (Link)1
9
Reserved
10
RESET (pull
low to reset)
Note: the reset
input is 3.3V
tolerant.
11
RxB (input)
12
TxB (output)
1Current limiting resistor on board is 220 Ohms.
2150 Ohms exist between the Pin 4/5 node and the Pin 7/8 node.
A = Port (Channel) 1 B = Port (Channel) 2
Ethernet Interface
The standard Micro125 ships with an RJ45 10/100Base-T Ethernet connector (CON2). At
the time of ordering, you can specify whether to include this RJ45 connector. You can
use CON3 as an alternative.
Figure 2-5 RJ45 Ethernet Connector
1 8
1 - TX+
2 - TX-
3 - RX+
6 - RX-