Digi Digi Conntect ME Application guide

  
   
 
TM
TM
90000631_A
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 Digi International Inc. 2004. All Rights Reserved.
The Digi logo is a registered trademark of Digi International, Inc.
Connectware and Digi Connect ME and Digi Connect Wi-ME are trademarks of Digi International, Inc.
NetSilicon, NET+Works, NET+OS, and NET+ are trademarks of NetSilicon, Inc.
All other trademarks mentioned in this document are the property of their respective owners.
Information in this document is subject to change without notice and does not represent a commitment on the part of Digi
International.
Digi provides this document “as is,” without warranty of any kind, either expressed or implied, including, but not limited to,
the implied warranties of fitness or merchantability for a particular purpose. Digi may make improvements and/or changes
in this manual or in the product(s) and/or the program(s) described in this manual at any time.
This product could include technical inaccuracies or typographical errors. Changes are periodically made to the information
herein; these changes may be incorporated in new editions of the publication.
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Contents
About This Document ................................................................................................................7
Kits Contents....................................................................................................................7
Related Documentation....................................................................................................8
Support Information.........................................................................................................8
Chapter 1: About the Digi Connect ME & Digi Connect Wi-ME Embedded Modules.9
Overview..........................................................................................................................9
Types of Modules...........................................................................................................10
Connectors: Power and Device Interface.......................................................................12
Connectors: Ethernet Interface.......................................................................................13
Connectors: Antenna......................................................................................................15
Module LEDs.................................................................................................................15
Chapter 2: About the Development Board .......................................................................17
Overview........................................................................................................................17
Basic Description ...........................................................................................................18
Port Descriptions............................................................................................................20
Connectors and Blocks...................................................................................................23
Switches..........................................................................................................................27
Development Board LEDs .............................................................................................30
Power Jack......................................................................................................................32
Test points ......................................................................................................................33
Chapter 3: Programming Considerations.........................................................................35
Overview........................................................................................................................35
GPIO...............................................................................................................................36
LEDs...............................................................................................................................38
Reset...............................................................................................................................38
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6 
Flash............................................................................................................................... 40
Appendix A Module Specifications....................................................................................41
Network Interface .......................................................................................................... 41
Serial Interface............................................................................................................... 42
Data Rates (bps)............................................................................................................. 42
Flow Control Options..................................................................................................... 42
GPIO .............................................................................................................................. 42
DC Characteristics ......................................................................................................... 43
Environmental................................................................................................................ 44
Mechanical..................................................................................................................... 45
Dimensions..................................................................................................................... 46
Recommended PCB Layout........................................................................................... 51
Antenna Information...................................................................................................... 53
RF Exposure Statement.................................................................................................. 54
Safety Statements........................................................................................................... 55
Appendix B Certifications.................................................................................................. 57
FCC Part 15 Class B ...................................................................................................... 57
Industry Canada ............................................................................................................. 58
Declaration of Conformity............................................................................................. 59
International EMC Standards......................................................................................... 60
Safety Standards............................................................................................................. 60
Appendix C Sample Application: TTL Signals to EIA-232............................................61
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•••••••••••••••••••••••••••••••••••••••••••••••••••••••
•
About This Document
Scope of the Reference Manual
The purpose of this document is to enable developers to integrate the Digi Connect ME or
Digi Connect Wi-ME embedded modules with other devices, enabling these devices to
make use of the module’s rich networking features.
Note Unless mentioned specifically by name, the products will be referred to as the
embedded modules or modules. Individual naming is used to differentiate
product specific features.
Kits Contents
This manual is intended for customers who use embedded modules Integration Kits or
Development Kits, which are described below.
About the Integration Kit
The integration kit is the ideal platform for product evaluation, rapid prototyping, and
integration of the embedded modules. Targeted specifically at customers who want to take
advantage of the embedded modules with Digi plug-and-play firmware functionality, it
enables integration of the modules without any extensive embedded software development
with all the additional flexibility and benefits of web user interface customization and
application specific java applets.
About the Development Kit
The Digi Connect ME or Digi Connect Wi-ME Development Kit are easy-to-use and
royalty-free development platforms that significantly reduces traditional design risk and
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Related Documentation
8  Digi Connect Wi-ME & Digi Connect ME Hardware Reference
accelerates the overall software development process. The kits deliver the integrated
building blocks to quickly and cost effectively create your own custom firmware for an
embedded module based high-performance networking solution that fits the specific
requirements of your application.
Related Documentation
See the NS7520 Hardware Reference for information on the NS7520 chip.
Support Information
To get help with a question or technical problem or make comments and recommendations
about Digi products and documentation, use the following contact information.
General Customer Service and Support
Digi International
11001 Bren Road East
Minnetonka, MN 55343
U.S.A.
United States: 1 877-912-3444
Other Locations: 1 952-912-3444
www.digi.com/support/
www.digi.com
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About the Digi Connect
ME & Digi Connect Wi-ME
Embedded Modules
CHAPTER 1
Overview
The embedded modules provide fully transparent device connectivity over industry-
standard Ethernet connections and allows both equipment manufacturers and systems
integrators to network-enable products at a fraction of the time and cost required to develop
a custom solution. It is a highly flexible and compact single component solution with a
serial port, GPIO ports, and a robust on-board TCP/IP stack and 10/100 BASE-T Ethernet
support or wireless interface..
From medical systems to building control and industrial automation, in virtually any
application where embedded device connectivity over Ethernet or wireless connectivity is
needed, embedded modules are the ideal choice, delivering high-performance functionality.
Note Unless mentioned specifically by name, the products will be referred to as the
embedded modules or modules. Individual naming is used to differentiate
product specific features.
This chapter provides information about the modules hardware and contains the following
topics:
 "Types of Modules" on page 10
 "Connectors: Antenna" on page 15
 "Connectors: Ethernet Interface" on page 13
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Types of Modules
10  Digi Connect Wi-ME & Digi Connect ME Hardware Reference
 "Module LEDs" on page 15
Types of Modules
The type of module that you will use for hardware integration depends on the kit you are
using. If you are using an integration kit, you will be using a module without a JTAG
interface. If you are using a development kit, you will be using a module with a JTAG
interface.
Note JTAG is a commonly used term that is also referred to as IEEE 1149.1, an
industry standard test protocol. JTAG is an abbreviation for the European Joint
Test Action Group, which invented the first versions of the IEEE 1149.1
interface. The JTAG interface, along with the other development tools, enables
you to download, run and debug programs on the module.
The following figures show the two types of modules.
Digi Connect ME Modules
Model Description Figure
DC-ME-01T-JT
 Used for development purposes
only
 JTAG interface
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About the Digi Connect ME & Digi Connect Wi-ME Embedded Modules
DC-ME-01T-S
DC-ME-01T-C
 No JTAG interface
 Ordered independently of either
kit for use in your
implementation.
Digi Connect ME Modules
Model Description Figure
Digi Connect Wi-ME Modules
Model Description Figure
DC-WIME-01T-JT
 Used for development purposes
only
 JTAG interface
DC-WIME-01T-S
DC-WIME-01T-C
 No JTAG interface
 Ordered independently of either
the development or integration
kit for use in your
implementation.
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Connectors: Power and Device Interface
12  Digi Connect Wi-ME & Digi Connect ME Hardware Reference
Note -S: No JTAG for use with Digi Firmware
-C: No JTAG for use with Custom Firmware
-JT: With JTAG for use with custom firmware development
Connectors: Power and Device Interface
The module has a 20-pin male connector that supports a serial interface with data rates up
to 230,400 bps and full-modem control, and GPIO ports. See the following figure for pin
orientation and the table for pin assignments.
Note Digi recommends 100 pF capacitors to circuit ground on all inputs and outputs
to the module for ESD immunity. This includes the power pass-thru pins if they
are not used.
Power and Device Interface Connector
Power and Device Interface Connector Pin Assignments
Pin Signal Description
1 VETH+ Power Pass-Thru +
2 VETH- Power Pass-Thru -
3-6 — Position Removed
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About the Digi Connect ME & Digi Connect Wi-ME Embedded Modules
Note The development board provides a reference design of a POE (Power Over
Ethernet) power supply. A schematic for this reference design is installed by
the setup program on the CD.
Connectors: Ethernet Interface
The Ethernet connector is an 8-wire RJ-45 jack that meets the ISO 8877 requirements for
10/100BASE-T. See the following figure and table for pin orientation and pin assignments.
Note Pin orientation and assignments are the same for modules with or without a
JTAG connector.
7 RXD Receive Data (Input)
8 TXD Transmit Data (Output)
9 RTS / GPIO 4 Request to Send (Output) / GPIO
10 DTR / GPIO 5
Data Terminal Ready (Output) / GPIO
11 CTS / GPIO 2 Clear to Send (Input) / GPIO
12 DSR / GPIO 3 Data Set Ready (Input) / GPIO
13 DCD / GPIO 1
Data Carrier Detect (Input) / GPIO
14 RESET Reset
15 +3.3V Power
16 GND Ground
17-19 — Reserved. Do not connect.
20 /INIT Software Reset
Power and Device Interface Connector Pin Assignments
Pin Signal Description
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Connectors: Ethernet Interface
14  Digi Connect Wi-ME & Digi Connect ME Hardware Reference
Ethernet Interface Pin Orientation
Ethernet Interface Pin Assignments
Pin
1Pin 2Pin 3Pin 4Pin 5Pin 6Pin 7Pin 8
TXD+ TXD- RXD+ EPWR+ EPWR+ RXD- EPWR- EPWR-
Transmit
Data + Transmit Data - Receive Data + Power from
Switch +
Power
from
Switch +
Receive
Data - Powerfrom Switch - Power from Switch -
00000021
Pin 1
Pin 8
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About the Digi Connect ME & Digi Connect Wi-ME Embedded Modules
Connectors: Antenna
The Digi Connect Wi-ME is available with 1 RP-SMA connector. The antenna is
connected to the module with a reverse polarity SMA connector (sub-miniature size A).
The antenna only fits on the module one way to ensure a proper connection. Another option
for both signal reception and design flexibility is to use a "pig tail" cable (Digi part number
DC-ANT-EC) to separate the antenna from the module. This allows the module to fit inside
your product but the antenna to be placed outside the device.
Module LEDs
The module has two LEDs that are located near the upper corners of the Ethernet port (see
the following figure). The following table describes the LEDs.
Note The LEDs are the same for a module with or without a JTAG connector.
Antenna Specifications
Type Dipole
Part number DC-ANT-24DP
Gain 2 dBi
Caution: This Part 15 radio device operates on a non-interference basis
with other devices operating at this frequency when using the antennae
listed in the Antenna Specification table. Any changes or modification to
user’s authority to operate the device.
the product not expressly approved by Digi International could void the
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Module LEDs
16  Digi Connect Wi-ME & Digi Connect ME Hardware Reference
LED Locations
LED Descriptions
LED Color Description
Network Link (left-upper) Yellow
Network Link is operational: On
(continuously) indicates that an Ethernet
connection is made or an access point is
engaged.
Network Activity/
Diagnostic (right-upper) Green
Network Activity: On when network traffic
detected; off when no network traffic detected.
Diagnostic: Flashes three times in even
duration during power up or reset, indicating
successful startup.
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About the Development
Board
CHAPTER 2
Overview
The development board is a hardware platform from which you can determine how to
integrate the embedded modules into your design. The board consists of the following main
features:
 Socket for connecting the embedded modules
 JTAG connection (for use with the development kit only)
 GPIO switches
 Serial and GPIO ports
 Power input
This chapter provides information on development board components and contains the
topics listed below. For more detailed information on the development board, see the
schematic and mechanical drawings on the CD that accompanies your integration kit or
development kit. (If you have installed the integration kit or development kit, you can access
the schematic from the Start menu.)
 "Basic Description" on page 18
 "Placement of Module" on page 20
 "Connectors and Blocks" on page 23
 "Switches" on page 27
 "Development Board LEDs" on page 30
 "Power Jack" on page 32
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Basic Description
18  Digi Connect Wi-ME & Digi Connect ME Hardware Reference
 "Test points" on page 33
Basic Description
The development board contains connectors, switches, and LEDs for use while integrating
the embedded module into your design. See the following figure for the location of the
connectors, switches, and LEDs. Additionally, the board provides test points (not shown on
the figure). For more information about test points, see "Test points" on page 33.
Board Layout
00000005
P
8
P8
P1
1
P11
P4
C
R2
CR2
P
3
P3
C
R1
6
CR16
C
R
6
CR6
C
R1
5
CR15
P6
P6
S
W
2
SW2
P9
P9
S
W
3
SW3
C
R
4
CR4
CR
9
CR9
C
R
5
CR5
C
R
1
CR1
P7
P7
P
2
P2
S
W
1
SW1
P1
P1
C
R
8
CR8
C
R
7
CR7
C
R11
CR11
C
R1
0
CR10
C
R1
3
CR13
C
R1
2
CR12
C
R14
CR14
C
R
3
CR3
C
R17
CR17
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
P
12
P12
9
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About the Development Board
Caution When handling the development board, wear a grounding wrist strap to
avoid ESD damage to the board.
For more detailed information on connectors, switches and LEDs, see the following:
 "Port Descriptions" on page 20
 "Connectors and Blocks" on page 23
 "Switches" on page 27
 "Development Board LEDs" on page 30
 "Power Jack" on page 32
The development board accepts either of the following modules:
 Module without JTAG connector—for use with an integration kit
 Module with JTAG connector—for use with a development kit
See the following figures for placement of either module onto the development board.
Connectors, Switches and LEDs 1-8
Pin
1Pin 2Pin 3Pin 4Pin 5Pin 6Pin 7Pin 8
Secondary
Serial Port, P2 LEDs, CR1 -CR9 GPIO Switch Bank, SW1 GPIO Switch Bank, SW2 JTAG Header, P4
Jumper
Block, P12
(Reserved)
Embedded
Module
Connector, P7
JTAG
Connector, P8
Connectors, Switches and LEDs
9-16 (continued)
Pin
9Pin 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16
Primary
Serial Port, P1 GPIO Port, P3 LEDs, CR10 -
CR14
Digital Signal
Monitor Jack,
P6
LEDs, CR15
and CR16 Reset Switch,
SW3 LED, CR17 Power Jack,
P11
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Port Descriptions
20  Digi Connect Wi-ME & Digi Connect ME Hardware Reference
Placement of Module
Caution If you handle the module, wear a grounding wrist strap to avoid ESD
damage.
Port Descriptions
The development board provides the following ports:
 Primary Serial Port, P1
 Secondary Serial Port, P2
 GPIO Port, P3
See the figure titled "Board Layout" on page 18 for the location of the ports. The following
sections describe the ports.
Primary Serial Port, P1
The Primary Serial Port is a DB-9 male connector that is labeled as P1 on the development
board. The port is used with the integration kit and the development kit. See the following
figure for pin orientation; see the following table for pin assignments.
00000015
Module connector
Development
board
Module with
JTAG connector
Module JTAG
connector
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