MCC iPort MIIC-201D/U I²C Host Adapter User’s Guide

Below you will find brief information for I²C Host Adapter iPort MIIC-201D/U. This adapter allows your Windows PC to communicate with I²C devices. It features a USB interface, supports both master and slave modes, and includes free software for easy message sending and receiving. The package includes various cables and an optional power supply for added flexibility.

PDF

Document

User’s Guide

DLL/USB

I

C Host Adapter

with iPort Utility Pack Software

www.mcc-us.com

Introduction

The MCC iPort™ DLL/USB to I 2 C Host Adapter (#MIIC-201D/U) allows any

Windows 98se, 2000, XP, or higher PC, with a free USB port or self-powered USB hub, to become an I 2 C Master or Slave device, transmitting or receiving I 2 C messages between the PC and one or more I

C devices across an I

C Bus.

This user’s guide describes the installation and operation of the iPort DLL/USB I 2 C

Bus host adapter and the iPort Utility Pack Software for Windows.

Are you new to I 2 C? Want to know more? We suggest you review “What is I 2 C?” at www.mcc-us.com/I2CBusTechnicalOverview.pdf.

MCC products use Philips components and are licensed to use the I²C Bus.

“Purchase of Philips I²C components conveys a license under the Philips’ I²C patent to use the components of the I²C system, provided the system conforms to the I²C specifications defined by Philips.”

I²C is a trademark of Philips Corporation.

09-JAN-07

No part of this publication may be reproduced by any means without the prior written permission of Micro Computer Control Corporation, PO Box 275,

Hopewell, New Jersey 08525 USA.

DISCLAIMER: Micro Computer Control Corporation makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Further, Micro

Computer Control Corporation reserves the right to revise the product described in this publication and to make changes from time to time in the content hereof without the obligation to notify any person of such revisions or changes.

WARNING - Life Support Applications: MCC products are not designed for use in life support appliances, devices, or systems where the malfunction of the product can reasonably be expected to result in a personal injury.

WARNING - Radio Frequency Emissions: This equipment can radiate levels of radio frequency energy that may cause interference to communications equipment.

Operation of this equipment may cause interference with radio, television, or other communications equipment. The user is responsible for correcting such interference at the expense of the user.

WARNING - Electrostatic Discharge (ESD) Precautions: Any damage caused by

Electrostatic Discharge (ESD) through inadequate earth grounding is NOT covered under the warranty of this product. See the “Electrostatic (ESD) Precautions” section of this guide for more information.

Printed in the United States of America

Part 1 - iPort DLL/USB I 2 C Bus Host Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 iPort DLL/USB I 2 C Bus Host Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 iPort DLL/USB Virtual Communications Port (VCP) . . . . . . . . . . . . . . . . . . . . 2 iPort Utility Pack Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 iPort Software Development Kit for Windows . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Packing Slip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Interconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

USB Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Virtual Communications Port (VCP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

+5VDC Power Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

I 2 C Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Hardware Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pull-up Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Connecting to a 3.3 Volt Target System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Connecting to an SMBus Target System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 ESD (Electrostatic Discharge) Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Host Computer Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Grounding Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Hardware Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Part 2 - iPort Utility Pack for Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1 iPort Utility Pack for Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 iPort Message Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 iPort Message Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2 System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3 iPort Utility Pack Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Installing from CD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Installing from the Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4 iPort Message Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Message Center Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Starting the Message Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Selecting the Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Select the Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Options Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Establish Adapter Communications Link . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Entering or Editing I

C Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Set I 2 C Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Set Message Read/Write Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Specify Repeated Start Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Set Time Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Specify Write Data or Read Byte Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Inserting and Deleting Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Saving or Loading Message Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Send the Message List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Special Event Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Slave Not Acknowledging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Command Line Arguments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Set Adapter Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Set RS-232 Communication Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Set RS-232 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Set I 2 C Bus Clock Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Enable /INT Signal Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Stop On Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Stop On Arbitration Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Stop On Slave Negative Acknowledgment . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Beep On Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Beep On Arbitration Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Beep On Slave Negative Acknowledgment . . . . . . . . . . . . . . . . . . . . . . . . . 26

Beep On /INT Assert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Load I

2 C Message List File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Saved I 2 C Message List File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Auto Open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Auto Send . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Auto Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5 iPort Message Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Message Manager Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Starting the Message Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Select the Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Establish Adapter Communications Link . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Advanced Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Adapter’s Own I 2 C Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

General Call Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

I 2 C Bus Master Bit Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

I 2 C Bus Time-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Enable INT Signal Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Diagnostic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Log File Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Log File Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Log File Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Sending I 2 C Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Master Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Specifying the Destination Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Repeated Start Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Auto Repeat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Master Transmitting Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Specifying Master Tx Message Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Sending Master Transmit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Master Receive Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Specifying Data to Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Negative Acknowledge Last Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Master Transmit and Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Slave Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Slave Transmit Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Slave Receive Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6 Uninstalling Software Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Uninstalling iPort Utility Pack for Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Uninstalling iPort DLL/USB VCP Device Driver . . . . . . . . . . . . . . . . . . . . . . . 37

iPort DLL/USB Revision Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Appendix A - I 2 C Connector Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Part 1 - iPort DLL/USB I 2 C Bus Host Adapter

Part 1 DLL/USB

I

C Bus Host Adapter

User’s Guide

Model: MIIC-201D/U

1 Overview

The MCC iPort DLL/USB I 2 C Bus Host Adapter (#MIIC-201D/U) allows any

Windows 98se, 2000, XP, or higher PC with a free USB port or self-powered USB hub, to become an I 2 C Master or Slave device, transmitting or receiving I 2 C messages between the PC and one or more I 2 C devices across an I 2 C Bus.

iPort DLL/USB Product Features:

• Compatible with existing iPort (#MIIC-201) applications.Upgrade existing iPort applications from RS-232 to USB. No software changes required.

• Windows DLL Application Program Interface (API).

• Compatible with Windows 98se, 2000, XP, or higher based PC.

• Compatible with USB 2.0 Specifications.

• Supports I 2 C Bus Master and Slave, Transmit and Receive operations.

• User Selectable Master I 2 C bit rates of 12.5 KHz and 100 KHz.

• Compatible with 3.3V to 5V I 2 C Bus voltages.

• Includes switch-enabled internal I 2 C Pull-Up resistors.

• Includes our free I 2 C Message Center and Message Manager Windows

Applications. Get on the I 2 C Bus in Seconds.

• Includes our easy to use Virtual Communications Port (VCP) driver.

The I 2 C adapter system consists of the following components:

1.1

iPort DLL/USB I 2 C Bus Host Adapter

The iPort DLL/USB adapter is a bus-powered USB device that plugs into a host computer’s USB port or self-powered USB hub and generates I 2 C Bus signals.

1.2

iPort DLL/USB Virtual Communications Port (VCP)

The iPort DLL/USB Virtual Communications Port (VCP) driver creates a virtual serial port within the iPort DLL/USB device. To a Windows software application, the VCP looks just like a legacy serial communications port, allowing standard iPort DLL programming methods to work unchanged. No special USB programming is required. The iPort DLL/USB VCP is available to the host computer whenever the iPort DLL/USB is attached to the host computer.

1.3

iPort Utility Pack Software

This free software package includes the iPort Message Center and Message

Manager applications to help you easily send and receive I 2 C Bus messages.

1.4

iPort Software Development Kit for Windows

This optional software package includes:

• iPort DLL (Dynamic Linked Library) for Windows

• Programmer’s Guide

• Sample Application Programs

This iPort Software Development Kit for Windows is only needed if you are developing a custom Windows software application for the iPort DLL/USB. Find additional sample programs and complete projects on our web site’s Sample

Program page.

1.5

Packing Slip

This package includes the following items:

• iPort DLL/USB I 2 C Bus Host Adapter (#MIIC-201D/U).

• USB Interface Cable.

• I 2 C Clip-Lead Cable.

• I 2 C Interface Cable.

• iPort DLL/USB User’s Guide (this document).

• iPort Utility Pack for Windows CD.

• Global Power Supply (Optional supplement power for target system).

1.6

System Requirements a. A host computer with one free USB port or self-powered USB hub.

b. Windows 98se, 2000, XP or higher.

2 Interconnects

The iPort DLL/USB includes three interconnections:

2.1

USB Connector

The USB connector provides connection from the I 2 C adapter to a USB port on the host computer or self-powered USB hub. The iPort DLL/USB operates as a bus-powered USB device, with limited target system power. Additional target system power can be provided via an included external power supply.

2.1.1 Virtual Communications Port (VCP)

The iPort DLL/USB provides a Virtual Communications Port (VCP) interface via a host computer driver. Application programs running on the host computer communicate with the iPort DLL/USB via the standard iPort DLL.

2.2

+5VDC Power Jack

The iPort DLL/USB is a bus-powered USB device. When deriving power from the

Universal Serial Bus only, a limited amount of power is available to a target system via +5V wire in the I 2 C Interface Connector. Additional power for a target system can be provided via the +5VDC Power Jack. When connected to the +5VDC Power

Jack, an external power supply will remove all target system power load from the

USB and replace it with power from the external power supply. See the “Hardware

Setup” section for additional details.

2.3

I 2 C Interface Connector

The I 2 C adapter includes a four wire, positive locking, modular receptacle connector

(see Appendix A) for interfacing to an external I 2 C Bus. Lines provided include I 2 C

Clock (SCL), I 2 C Data (SDA), Ground, and +5V.

Minimum wiring for I 2 C communications include I 2 C Clock, Data, and Ground.

Use of the +5V wire in the I 2 C Interface connector is optional. Connect this wire to the target system to power the target system from either:

1 USB derived power. Maximum available target system power is 100 ma at

+5V.

2 A +5VDC Power Jack connected external +5V regulated power supply.

Maximum available target system power is 250 ma at +5V.

Receptacle Connector

An I 2 C Clip-Lead cable is provided to connect the I 2 C adapter to a target system.

Each clip-lead is clearly marked (C=SCL, V=+5VDC, D=SDA, G=Ground).

An I 2 C Interface Cable (White=SCL, Red=+5VDC, Green=SDA, Black=Ground) is also provided to connect the I 2 C adapter to an external I 2 C Bus. Since there is no standard I 2 C Bus connector, you may want to cut off one end of the cable and add a connector compatible with your target system. Additional I 2 C Interface Cables (4 ft., 8 ft., or 16 ft.), and modular connectors are available from MCC. Additional

Clip-Lead cables are also available. (see Appendix A)

3 Hardware Configuration

3.1

Pull-up Resistors

I 2 C Bus systems are based on open-collector technology requiring pull-up devices on each signal wire. These pull-up devices usually take the form of pull-up resistors connected to bus power.

The I

C adapter includes a slide switch used to enable or disable internal +5VDC

I 2 C Bus 1.8K ohm pull-up resistors attached to the SCL, SDA, and /INT lines.

Every I 2 C Bus system must have at least one pull-up on the signal lines. Use this switch to configure the pull-up resistors for your system.

3.2

Connecting to a 3.3 Volt Target System

If you are connecting the I 2 C adapter to a 3.3 volt target system, you should follow these steps BEFORE applying power:

• Shut off the I 2 C adapter’s internal pull-ups (See Pull-up Resistor section). Use external pull-ups to the target system’s 3.3V power. These pull-ups may already be present in the target system.

• Disconnect the I

C connector +5V wire from the target system. The I

C adapter will be powered from its own +5V power supply, and the target system will be powered by its own 3.3V power supply.

The I 2 C adapter is a 5-volt device. Any signal above 3.3V on the SCL, SDA, and

/INT lines is high enough for the adapter to see a Logical 1.

3.3

Connecting to an SMBus Target System

If you are connecting the I 2 C adapter to a SMBus target system, you should follow these steps BEFORE applying power:

• Shut off the I 2 C adapter’s internal pull-ups (See Pull-up Resistor section).

• Use external SMBus rated (appoximately15k ohms) pull-up resistors. These pull-ups may already be present in the target system.

• Visit our I 2 C versus SMBus FAQ page (www.mcc-us.com/I2CSMBusFAQ.htm).

• See the SMBus Specification for additional details.

Special Note for SMBus Users: MCC’s I 2 C adapters are designed to be I 2 C Bus

compatible, not SMBus compatible. Some features of the SMBus protocol not supported include time-outs, device reset, and Packet Error Check byte processing.

The non-supported SMBus features may, or may not, permit the use of the I 2 C adapter in your SMBus application. Consult the MCC FAQ web page and SMBus

Specification for details.

4 ESD (Electrostatic Discharge) Precautions

Electrostatic discharge is defined as the transfer of charge between bodies at different electrical potentials. Electrostatic discharge can change the electrical characteristics of a semiconductor device, degrading or destroying it. Electrostatic discharge also may upset the normal operation of an electronic system, causing equipment malfunction or failure.

When connecting the I 2 C adapter to a host computer and a target system, extreme care must be taken to avoid electrostatic discharge. Failure to follow ESD protection procedures when using the I 2 C adapter could damage the host computer, I 2 C adapter, or the target system, and void product warranty coverage.

4.1

Host Computer Grounding

Case 1 - Desktop and Single-board Computers. The chassis on a desktop or single-board host computer must be connected to earth ground to comply with safety regulations. If the computer chassis is NOT connected to earth ground for some reason (i.e., use of a two-prong power mains plug), the host computer power supply ground will float to some unknown voltage potential.

Case 2 - Laptop Computers. Laptop computers present special ESD problems. Most laptop computers use an external double-insulated mains power supply which is

NOT connected to the mains earth ground. This means that the laptop chassis is floating at some unknown voltage potential.

In either case, upon connection to the I

2 C adapter and the target system, the host computer will discharge energy through its serial port to the I 2 C adapter, and on to the target system. This discharge could damage the host computer, I

C adapter, and the target system.

4.2

Grounding Solutions

To avoid damage to the host computer, I 2 C adapter, or target system, follow these instructions:

• Wear an earth grounded wrist strap, or discharge any static charge build-up, when handling the I 2 C adapter or any target system devices.

• Ensure that both the host computer and target system are connected to a common earth ground point.

• Make sure that all interconnections are made BEFORE applying power to the host computer, I 2 C adapter, and target system.

• If you are using a laptop computer or host computer that is NOT connected to mains earth ground, make a hard-wired connection from the host computer (i.e., port connector shell) and the target system ground connector to a common earth ground point.

• Avoid plugging and unplugging system components while the host computer or target system is powered.

• Ensure that any devices connected to the target system are properly grounded to the common earth ground point.

• If unsure how to properly ground system components, seek electrical expert help.

WARNING: Any damage caused by Electrostatic Discharge (ESD) through inadequate earth grounding is NOT covered under the warranty of this product.

5 Hardware Set-Up

This section provides information on connecting the I 2 C adapter to your host computer and I 2 C Bus target system.

1. Attach the iPort DLL/USB adapter to a free USB port on your host computer or self-powered USB hub. If this is the first time the iPort DLL/USB is connected to the host computer, the Windows Hardware Wizard will appear.

Follow the on-screen directions. The required driver files can be found in the root-directory of the iPort Utility Pack for Windows CD, and after iPort

Utility Pack software installation, in the installed iPortDLLUSB Driver folder.

NOTE: The Hardware Wizard may run multiple times to install the iPort

DLL/USB VCP driver, and the iPort DLL/USB device. If the Hardware

Wizard warns that the driver files is not certified, press continue.

The Windows Hardware Wizard will assign the iPort DLL/USB to a new communications port number. You can find the ComPort number of the iPort

DLL/USB by running our Message Center or Message Manager software, and selecting the iPort DLL/USB device. You can also find the ComPort number by expanding the Ports Icon in the Windows Control Panel | System | Device

Manager application.

At this time you can install the iPort Utility Pack software. See the installation instructions in “Part 2 - iPort Utility Pack for Windows” of this User’s Guide.

2. Connect the I 2 C Bus cable to the I 2 C adapter and your I 2 C device. You can make this connection with the included I 2 C Clip-Lead cable or I 2 C Interface

Cable.

The I 2 C interconnect includes a +5V wire. You may not need to, or want to, connect the +5V wire to your target system. Refer to the “+5VDC Power

Jack” and “Hardware Configuration” sections for details on pull-up resistors and connecting the optional +5V wire.

3. Optionally connect the external power supply to the power jack. I 2 C adapter power is derived from the USB, with a limited amount of power available to the target system via the I

C connector. Use of the external power supply provides additional power to the target system via the I 2 C connector. See

“+5VDC Power Jack” section for additional details.

If you have any questions on I 2 C adapter setup and configuration, please contact our technical support department via our web site.

Part 2 - iPort Utility Pack for Windows

Part 2 iPort Utility Pack for

Windows

V5.4

1 iPort Utility Pack for Windows

The iPort Utility Pack for Windows is your express lane to I 2 C Bus communications. The Utility Pack includes two (2) Windows-based applications

(Message Center and Message Manager) that will help you get started sending and receiving I 2 C Bus messages quickly and easily.

1.1

iPort Message Center

The iPort Message Center, our most popular application, operates with all versions of our I 2 C Bus Host Adapters. With the Message Center, you can create, save, and automatically execute scripts of I 2 C Bus messages. I 2 C Bus message activity includes:

• Master Transmit

• Master Receive

1.2

iPort Message Manager

The iPort Message Manager operates with all versions of our I 2 C Bus Host

Adapters. Using the Message Manager, you can perform all four (4) modes of I 2 C

Bus message activity, including:

• Master Transmit

• Master Receive

• Slave Transmit

• Slave Receive

2 System Requirements

One of the following MCC I 2 C Bus adapters:

1. iPort/USB (#MIIC-204) USB to I 2 C Bus Host Adapter.

2. iPort/AFM (#MIIC-203) RS-232 to I 2 C Bus Host Adapter with ASCII Fast

Mode Interface.

3. iPort/AI (#MIIC-202) RS-232 to I 2 C Bus Host Adapter with ASCII Interface

4. iPort (#MIIC-201) Windows to I

C Bus Host Adapter.

5. Variable Clock Rate (#MIIC-201-V) I 2 C Bus Host Adapter.

6. iPort DLL/USB (#MIIC-201D/U) I 2 C Bus Host Adapter.

Windows 95 OS or higher. Windows 98se, 2000, XP or higher for iPort/USB and iPort DLL/USB. One free RS-232 Serial Port, or USB port for iPort/USB and iPort

DLL/USB.

3 iPort Utility Pack Installation

3.1

Installing from CD

1. Insert a software distribution CD into your CD drive.

2. If the install program does not start automatically, select Start * Run and type

“D:SETUP.EXE.” Click OK.

3. Follow instructions on screen.

3.2

Installing from the Web

Visit MCC’s web site (www.mcc-us.com), and click on the Upgrades/Updates link.

1 Follow the instructions listed on the Upgrade/Update web page.

4 iPort Message Center

The iPort Message Center supports I 2 C Master Transmit and Master Receive activities for all MCC I 2 C Bus host adapters. With this program you can create, save, and execute scripts of I 2 C Master messages.

Main Application

The iPort Message Center allows a PC to become an I

C Master transmitter or receiving device, sending I 2 C messages between the PC and one or more I 2 C devices across an I 2 C Bus.

The iPort Message Center is designed to be a simple application for experimenting with I 2 C messages. It provides methods to:

1. Enter/Edit a list of I 2 C Master Transmit or Receive Messages.

2. Save and/or Load a list of I 2 C Master messages to/from disk.

3. Transmit the current list of I 2 C Master messages, with the option to auto-repeat upon completion, send on INT signal assertion (with INT signal supported adapters only), and beep or stop on special I 2 C Bus events.

4. Use command line arguments to automatically load, send, and save I 2 C messages from a batch file or another program.

Each I 2 C message can transfer up to 32 bytes of 8-bit data, with Repeated Start and

Time Delay options.

4.1

Message Center Operations

Communicating with another device on the I 2 C Bus is easy. Just install the software as described in Section 3, then follow these simple steps:

4.1.1 Starting the Message Center

Click, Start

Programs

* iPort Utility Pack

* iPort Message Center

4.1.2 Selecting the Adapter

Select the I 2 C adapter you are using by clicking the corresponding adapter image

(see Opening Screen), or the Device Select checkbox (see Main Application

Screen).

Opening Screen

Main Application

4.1.3 Select the Communications Port

Use the “ComPort:” control to select the communication port connected to the I 2 C adapter. If an iPort/USB or iPort DLL/USB is selected, the serial number for the adapter is displayed (Win 2000, XP+ only). In addition to legacy RS-232 ports and

Virtual Communication Ports, Message Center supports USB and network connected local or remote RS-232 ports via the Windows Com driver.

4.1.4 Options Menu

Use the Options menu to override default Baud Rate and I 2 C Bus Clock rate settings. Default settings and options are adapter dependant.

4.1.5 Establish Adapter Communications Link

Establish the communications link to the I 2 C adapter by clicking the Open Link button.

The Message Center sets the adapter’s own I 2 C Slave address to 0xFE. Once the link has opened successfully, you are an active I 2 C node. I 2 C messages entered into the message spreadsheet can be transmitted upon request. If the link open is not successful, follow the on-screen directions. Make sure the communications port is working, is enabled in the Windows Device Manager, and is not being used by other software.

4.1.6 Entering or Editing I 2 C Messages

I 2 C messages can be entered with the Message Editor, or a previously recorded message list can be loaded from the File menu.

To enter or edit a message, open the “I 2 C Message Editor” screen by double clicking on a message row in the spreadsheet.

Use the I 2 C Message Editor to:

1. Set I 2 C Address.

The I 2 C Address is the I 2 C slave address of the slave device being addressed on the bus. All slave addresses are displayed as even numbers (00...FE), representing the 7 most significant bits of the 8-bit slave address transmitted on the bus (aaaa aaa0).

The I 2 C adapter automatically supplies the 8 th , least significant, Read/Write bit when it sends the slave address across the bus. For master write operations, the Read/Write bit is always transmitted as a logical 0 (aaaa aaa0). For master read operations, the Read/Write bit is always transmitted as a logical 1 (aaaa aaa1).

Use the I 2 C Address control to set the slave address of the slave device you want to address on the bus.

2. Set Message Read/Write Direction.

As a bus master device, the I 2 C adapter can write data to, or read data from, any device on the bus. Use the Msg Direction control to specify if the current message is a master write, or master read, operation. Upon making your selection, additional Write or Read parameters appear.

3. Specify Repeated Start Messages.

I 2 C Bus communications support an operation called Repeated Start. In this operation, a message is sent across the bus beginning with a Start Condition, but without a Stop Condition at the end of the message. The next message sent

across the bus begins with a Start Condition, in this case a Repeated Start.

An I 2 C Bus master, that successfully sends a message on the bus, owns the bus until that master sends a message with a terminating Stop Condition. The

Repeated Start operation allows the bus master to retain control of the bus while sending one or more messages on the bus. This prevents other bus masters, in a multi-master system, from accessing the bus and interfering with message sequences.

The Message Center supports Repeated Starts with the doStop control.

Sending an I 2 C message with doStop enabled will cause the message to be terminated with a Stop Condition. Sending an I 2 C message with doStop disabled will cause the message to end without a Stop Condition, allowing the next message to be sent with a Repeated Start.

4. Set Time Delay.

Message Center supports time delays after the completion of a message. Time delays can be used to synchronize or sequence bus messages with the activity of external devices.

5. Specify Write Data or Read Byte Count.

Enter the hexadecimal data you want to write to a slave receiver device, or the number of data bytes to read from a slave transmitter. Message Center supports up to 32 bytes of 8-bit data per message.

NOTE: The data you send may have special meaning to the receiving slave device, but to the Message Center, and the I 2 C adapter, message data has no special meaning. Consult your slave device’s data sheet for details.

Click OK to accept the message and enter it into the spreadsheet.

Master Write messages display the message data in the spreadsheet. Master Read messages display 0xFF placeholders in the spreadsheet. Upon execution, actual data received from a slave transmitter replaces the placeholders in the message spreadsheet.

Repeat above steps for additional messages. The Message Center supports up to

32,000 messages in a list.

4.1.7 Inserting and Deleting Messages

You can insert a new message between existing messages by clicking once on a message below where you want to insert, then press the “Insert” key on your keyboard. The Message Editor also remembers the last message displayed, so double clicking on a blank spreadsheet row will allow you to copy a message.

Delete a message by single clicking on the message row and pressing the “Delete” key on your keyboard.

4.1.8 Saving or Loading Message Lists

Message Center I 2 C message lists can be saved to, or loaded from, a disk file. To save the current message list, click File|Save on the menu bar. To open an existing message list, click File|Open List on the menu bar.

Message lists are maintained in ASCII text files (*.IML) that can be edited manually or created with a customer-developed program. See message list files for details.

4.1.9 Send the Message List

An I

C message list can be sent manually, or automatically in response to an INT signal assertion (with INT signal supported adapters only). To send the list manually, click the Send button on the main application screen. To send the list in response to an INT signal assertion (low), enable the “/INT Signal Monitoring” checkbox, and check the “Send on /INT” checkbox. The list will be sent each time the INT signal is asserted.

The Message Center also supports the repeated sending of a message list. If the

Auto Repeat checkbox is checked, a message list will automatically repeat upon completion.

4.1.10 Special Event Handling

The Message Center supports the early termination of a message list, and beep on special events. See the “Stop On” and “Beep On” controls on the main application screen of available options.

4.1.11 Slave Not Acknowledging

If you get a “Slave Not Acknowledging” message in the Status window, this could indicate you have the wrong address in the I 2 C Destination Address, or the device is not answering to its address. Some slave devices temporarily stop acknowledging their address. Consult the slave device’s data sheet for details.

4.2

Command Line Arguments

The Message Center can be controlled via command line arguments. This feature allows the Message Center to be accessed from a batch file or another program.

Message Center

Command Line Arguments

Command iPort, iPort/AI, iPort/AFM, Variable, iPort/USB, iPortDLL/USB

COM1...COM20

Description

Specify I 2 C adapter type.*

Specify RS-232 communication port.

BAUD19200, BAUD57600, BAUD115200 Set RS-232 Baud Rate.*

CLOCK12.5K, CLOCK23K, CLOCK86K,

CLOCK100K, CLOCK400K, VCLOCK

Set I 2 C Bus Clock Rate.*

Monitor/INT

StopOnBusy

StopOnArbLoss

StopOnNak

BeepOnBusy

BeepOnArbLoss

BeepOnNak

Enable /INT Signal Monitor.*

Stop sending on I 2 C adapter busy.

Stop sending on I 2 C Bus Arbitration Loss.

Stop on Slave Negative Acknowledgment.

Beep on I 2 C adapter busy.

Beep on I 2 C Bus arbitration loss.

Beep on Slave Negative Acknowledgment.

BeepOn/INT

AutoLoad

AutoSave

AutoOpen

AutoSend

AutoExit

Beep on /INT signal assert (low).*

Load I 2 C message list file.

Save I 2 C message list file.

Open link to I 2 C adapter.

Send I 2 C message list.

Exit after sending message list.

* Adapter specific commands. See command details below.

Command Line Syntax: imsgctr.exe AdapterType argument-list

Example: imsgctr.exe iPort/AFM adctest01.iml AutoOpen AutoSend AutoExit

4.2.1 Set Adapter Type iPort/USB iPort/AFM iPort/AI iPort/USB (#MIIC-204) iPort/AFM (#MIIC-203) iPort/AI (#MIIC-202) iPort

Variable iPort (#MIIC-201)

Variable Clock (#MIIC-201-V) iPortDLL/USB iPort DLL/USB (#MIIC-201D/U)

The Adapter Type argument should be the first argument in the argument list as it controls the availability of other arguments. If the Adapter Type is not specified, the startup adapter selection screen will be presented.

4.2.2 Set RS-232 Communication Port

1 st Available ComPort (Default)

COM1...COM40

Set the RS-232 communications port attached to the I 2 C adapter.

4.2.3 Set RS-232 Baud Rate

BAUD19200 (Default)

BAUD57600 (iPort/AFM or iPort/USB ONLY)

BAUD115200 (iPort/AFM or iPort/USB ONLY)

Set the RS-232 Baud Rate.

4.2.4 Set I 2 C Bus Clock Rate

CLOCK12.5K

CLOCK23K

CLOCK86K

CLOCK100K

(iPort and iPort DLL/USB ONLY)

(iPort/AFM and iPort/USB ONLY)

(iPort, iPort/AI, iPort/AFM, iPort/USB, iPort DLL/USB,

CLOCK400K

Default)

(iPort/AFM and iPort/USB ONLY)

VCLOCK=nnnHz (Variable ONLY. nnn=451...57787)

Set the I 2 C Bus Clock Rate to the specified value. The defaults rate for the Variable

Clock adapter is 451Hz. The Variable Clock adapter does not support all rates

within the specified range. The Message Center will adjust the specified rate to the nearest available supported rate.

4.2.5 Enable /INT Signal Monitor

Monitor/INT (on INT supported adapters only. Default=OFF)

Enable /INT signal monitoring.

4.2.6 Stop On Busy

StopOnBusy (Default=OFF)

Stop sending I 2 C messages if the adapter returns a "Busy" response to the host computer.

4.2.7 Stop On Arbitration Loss

StopOnArbLoss (Default=OFF)

Stop sending I 2 C messages if the adapter returns a "Bus Arbitration Loss" response to the host computer. Bus Arbitration Loss occurs when another I

C Bus master wins arbitration while the adapter is attempting to become a bus master.

4.2.8 Stop On Slave Negative Acknowledgment

StopOnNak (Default=OFF)

Stop sending I 2 C messages if the adapter returns a "Slave Not Acknowledging" response to the host computer. Slave Not Acknowledging occurs when the adapter is attempting to become a bus master and no slave device acknowledges the transmitted slave address.

4.2.9 Beep On Busy

BeepOnBusy (Default=OFF)

Generate a host computer beep if the adapter returns a "Busy" response to the host computer.

4.2.10 Beep On Arbitration Loss

BeepOnArbLoss (Default=OFF)

Generate a host computer beep if the adapter returns a "Bus Arbitration Loss" response to the host computer. Bus Arbitration Loss occurs when another I 2 C Bus master wins arbitration while the adapter is attempting to become a bus master.

4.2.11 Beep On Slave Negative Acknowledgment

BeepOnNak (Default=OFF)

Generate a host computer beep if the adapter returns a "Slave Not Acknowledging" response to the host computer. Slave Not Acknowledging occurs when the adapter is attempting to become a bus master and no slave device acknowledges the transmitted slave address.

4.2.12 Beep On /INT Assert

BeepOn/INT (on INT supported adapters only. Default=OFF)

Generate a host computer beep if the adapter returns an "/INT Signal Assert" response to the host computer. /INT Signal Assert occurs if /INT Signal Monitoring is enabled and a high to low transition is detected on the adapter /INT signal connector.

4.2.13 Load I 2 C Message List File

AutoLoad=filename

AutoLoad="file name" filename.iml

"file name.iml"

Automatically open file with extension .IML and load messages into Message

Center spreadsheet.

4.2.14 Saved I 2 C Message List File

AutoSave=filename

AutoSave="file name"

Automatically save message list to the specified file upon executing AutoExit. Use to save message data read from a slave transmitter device.

4.2.15 Auto Open

AutoOpen Auto Open Link to I 2 C Adapter

Open link to the adapter.

4.2.16 Auto Send

AutoSend Auto Send I 2 C Message List

Send I 2 C messages loaded with the AutoLoad command.

4.2.17 Auto Exit

AutoExit Auto exit after sending the message list.

Message Center will auto exit after sending the last message in the I 2 C message list.

5 iPort Message Manager

The iPort Message Manager supports I 2 C Master and Slave, Transmit and Receive activities for all MCC I 2 C Bus host adapters, allowing a PC to become an I 2 C

Master or Slave device, transmitting or receiving I 2 C messages between the PC and one or more I 2 C devices across an I 2 C Bus.

Main Application

The Message Manager is designed to be a simple application for experimenting with I 2 C messages. Message Manager provides methods to:

1. Set the I 2 C adapter’s own I 2 C Slave address, General Call Enable, and other operating parameters.

2. Master Transmit ASCII text or Hex (00...FF) data to a specified I 2 C Slave

Receiver device.

3. Master Receive data from a specified I 2 C Slave device.

4. Perform Master Read after Write operations.

5. Slave Transmit data to a requesting I

C Master device.

6. Display Master or Slave Receive data in hexadecimal or ASCII.

7. Display I 2 C Bus communication events.

8. Assert or release the INT signal (on supported adapters only).

5.1

Message Manager Operations

Communicating with another device on the I 2 C Bus is easy. Just install the software as described in Section 3, then follow these simple steps:

5.1.1 Starting the Message Manager

Click, Start * Programs * iPort Utility Pack * iPort Message Manager

5.1.2 Select the Adapter

Select the I 2 C adapter you are using by clicking the corresponding adapter image

(see Opening Screen), or the Device Select checkbox (see Main Screen).

Opening Screen

Main Screen

5.1.3 Establish Adapter Communications Link

On the main screen, click the Open button to view the Set Up Screen. Three levels of setup options are available, Basic, Advanced, and Diagnostic. Only Basic setup is required.

Basic Set Up Screen

5.1.3.1 Basic Setup

Use the “ComPort” control to select the communication port connected to the I 2 C adapter. If an iPort/USB or iPort DLL/USB is selected, the serial number for the selected adapter is displayed (Win 2000, XP+ only). In addition to legacy and

Virtual RS-232 ports, Message Manager supports USB and network connected local or remote RS-232 ports via the Windows Com driver.

Select from the list of available baud rates. Then click OK.

After a few moments, the Communication Events window on the Main Application screen should report “I 2 C Open Successful.”

If open is not successful, follow the on-screen instructions. Make sure the communications port is working, is enabled in the Windows Device Manager, and is not being used by other software. Additional communication port open information is available in the log file. See Diagnostic Setup options.

Advanced Set Up Screen

5.1.3.2 Advanced Setup

On the Advanced Setup screen you can set the following parameters:

Adapter’s Own I 2 C Slave Address

Select the I 2 C adapter’s own slave address. The adapter will acknowledge messages sent to this slave address. The default address is 0x6E.

General Call Enable

General Call Enable allows the I 2 C adapter to respond as a slave receiver to the I 2 C

General Call Address (0x00). General Call is used by a master to broadcast an I 2 C message to multiple devices. The default value is enabled.

I 2 C Bus Master Bit Rate

Select I 2 C Bus speed during master operations. 100kHz is standard mode. 400kHz is fast mode. Available rates are I 2 C adapter dependant.

I 2 C Bus Time-Out

Specify how long the I 2 C adapter will wait before reporting an I 2 C Bus inter-byte time-out (0 = no time-out, 1 to 32767 milliseconds, iPort/AI fixed at 1 second).

Enable INT Signal Monitor (on supported adapters)

Enables monitoring of the INT signal state. INT state changes are reported in the main screen Communications Events window.

Diagnostic Set Up Screen

5.1.3.3 Diagnostic Setup (on supported adapters)

On the Diagnostic Set-up screen you can set the following parameters:

Log File Level

A log file is available for troubleshooting communication problems between the host computer and the I 2 C adapter. The log file is an ASCII text file viewable with any text editor. Select logging level. Level 1 provides minimum information. Level

4 provides maximum information.

Log File Name

Specify a log file name. Unless a path is specified, the log file will be created in the current working directory.

Log File Size

Specify log file length in lines. The log file overwrites earlier entries upon reaching the specified number on lines.

5.1.4 Sending I 2 C Messages

5.1.4.1 Master Operations

5.1.4.1.1

Specifying the Destination Address

The Destination Address is the I 2 C slave address of the slave device being addressed on the bus. All slave addresses are displayed as even numbers (00...FE), representing the 7 most significant bits of the 8-bit slave address transmitted on the bus (aaaa aaa0).

The I 2 C adapter automatically supplies the 8 th , least significant, Read/Write bit when it sends the slave address across the bus. For master write operations, the

Read/Write bit is always transmitted as a logical 0 (aaaa aaa0). For master read operations, the Read/Write bit is always transmitted as a logical 1 (aaaa aaa1).

On the main screen, use the I 2 C Destination Address list control to set the slave address of the slave device you want to address on the bus.

5.1.4.1.2

Repeated Start Messages

C Bus communications support an operation called Repeated Start. In this operation, a message is sent across the bus beginning with a Start Condition, but without a Stop Condition at the end of the message. The next message sent across the bus begins with a Start Condition, in this case a Repeated Start.

An I 2 C Bus master, that successfully sends a message on the bus, owns the bus until that master sends a message with a terminating Stop Condition. The Repeated Start operation allows the bus master to retain control of the bus while sending one or more messages on the bus. This prevents other bus masters, in a multi-master system, from accessing the bus and interfering with message sequences.

The Message Manager supports Repeated Starts with the doStop checkbox. Sending an I 2 C message with doStop checked will cause the message to be terminated with a

Stop Condition. Sending an I

C message with doStop unchecked will cause the message to end without a Stop Condition, allowing the next message to be sent with a Repeated Start.

5.1.4.1.3

Auto Repeat

The situation often arises, where you would like to automatically repeat a master message operation.

The Message Manager supports auto-repeat with the Auto Repeat checkbox. You can automatically repeat a master operation by checking the Auto Repeat control before clicking the Master Tx, Master Rx, or Master TxRx buttons. The master operation repeats until the Auto Repeat control is unchecked.

5.1.4.1.4

Master Transmitting Data

Specifying Master Tx Message Bytes

Master Tx Message Bytes is the ASCII or Hexadecimal data you want to transmit to a slave receiver device. With the Message Manager, entering master transmit data is easy. On the main application screen, click on the Master Tx Message Bytes box to open the data editor.

In the data editor, enter one or more ASCII text characters or hexadecimal data bytes. Each hexadecimal byte is entered as two ASCII-Hex characters (00 to FF) preceded by a tilde (~) character. ASCII text and hex data can be intermixed, as long as each hex byte is preceded by a tilde.

For example, to enter hex data bytes 0x00, 0x01, and 0x02, enter the characters

~00~01~02 into the text box.

Each iPort Message Manager I

C message can include up to 80 bytes of 8-bit ASCII binary data.

NOTE: The data you send may have special meaning to the receiving slave device, but to the Message Manager, and the I 2 C adapter, message data has no special meaning. Consult your slave device’s data sheet for details.

Click OK to accept the data.

Sending Master Transmit Messages

Click the Master Tx button to write the specified Master Tx Data Bytes to the selected destination slave device. If Auto Repeat is checked, the message will automatically repeat upon completion.

The Communications Events window on the main screen should report “Master Tx

Complete.” If this message does not appear, check the slave device address, connections, and power.

If you get a “Slave Not Acknowledging” message in the Communications Events window, this could mean you have the wrong address in the I 2 C Destination

Address, or the device is not answering to its address. Consult your slave device’s data sheet for details.

5.1.4.1.5

Master Receive Data

Specifying Data to Read

On the lower part of the main screen, set the Bytes to MasterRx edit box to the number of bytes you want to read. For example: Set this to 1 to read a single byte.

Click on the MasterRx button to read the data from the selected slave device.

Data received from the slave is displayed in the Received Messages text box on the main screen. The Communications Events window should report “Master Rx

Transfer Complete.” If this message does not appear, check the slave device address, connections, and power.

If you get a “Slave Not Acknowledging” message in the Communications Events window, this could mean you have the wrong address in the I 2 C Destination

Address, or the device is not answering to its address. Consult your slave device’s data sheet for details.

Negative Acknowledge Last Byte

On supported adapters, the doNak checkbox gives you the option to acknowledge, or negatively acknowledge, the last byte read from a slave device. Some Slave

Transmitter Devices require a negative acknowledgment on the final byte read from the slave device. I 2 C adapters not supporting this option automatically negatively acknowledge the last byte read.

5.1.4.1.6

Master Transmit and Receive

The Master TxRx button sends a master write message with no Stop Condition, immediately followed by a Repeated Start master read message with Stop.

5.1.4.2 Slave Operations

In addition to performing I 2 C Bus master operations, the Message Manager can also perform I 2 C bus slave transmit and receive operations.

5.1.4.2.1

Slave Transmit Data

Slave transmit data is entered in the Slave Tx Message Bytes text box control on the main screen. Data in this text box is automatically sent to a requesting master upon receiving a slave transmit request.

Like Master Transmit data, Slave Transmit data is entered with the data editor. To enter data to be transmitted, click on the Slave Tx Message Bytes text box to open the data editor. See “Specifying Master Tx Message Bytes” section for data entry details.

5.1.4.2.2

Slave Receive Data

Data bytes received from a Master Transmitter are automatically displayed in the main application screen Received Message window. Received data is displayed in

ASCII printable, or hexadecimal (~00 to ~FF) formats. Use the Hex-Display checkbox to force ASCII printable data to display in hexadecimal format .

6 Uninstalling Software Components

Software components include the iPort Utility Pack for Windows, and, for iPort/USB and iPort DLL/USB users, the Virtual Communications Port (VCP)

Device Driver. The following instructions can be used to remove either or both software components from your computer.

6.1

Uninstalling iPort Utility Pack for Windows

The iPort Utility Pack for Windows software is installed from the iPort Utility Pack for Windows CD. To uninstall the software, do the following:

Click, Start | Programs | iPort Utility Pack Vx.y | Uninstall.

Follow the on screen instructions.

6.2

Uninstalling iPort DLL/USB VCP Device Driver

NOTE: Computers using Windows 98se or Windows ME may need to be operating in safe-mode to complete this procedure. See your computer’s operating manual for safe-mode entry procedures.

The iPort DLL/USB VCP Device Driver is installed when the iPort DLL/USB is first connected to the computer, and the Windows Hardware Wizard completes the installation procedure. To uninstall the driver and release assigned communication port numbers, do the following:

Click, Start | Control Panel | Add or Remove Programs | iPort DLL/USB I2C Host

Adapter.

Follow the on screen instructions.

iPort DLL/USB Revision Report

This section defines revisions and changes made to the iPort DLL/USB interface:

Revision: 1.00

1 Initial Release

Additional Information

For additional information on the I 2 C Bus, please refer to the following:

“What is I 2 C?” www.mcc-us.com/I2CBusTechnicalOverview.pdf

“Frequently Asked Questions (FAQ)” www.mcc-us.com/faq.htm

"The I 2 C and How to Use It" www.mcc-us.com/i2chowto.htm

"80C51-Based 8-Bit Microcontroller" Data Handbook.

Philips Semiconductors, Tel. (800)227-1817

"I 2 C Peripherals for Microcontrollers" Data Handbook.

Philips Semiconductors, Tel. (800)227-1817

Appendix A - I 2 C Connector Information

Interface Connector and Plug Information

MCC uses two (2) different connectors and plug assemblies. We have found these parts to be compatible.

C Receptacle Connectors

Molex SEMCONN ACCESS.bus Receptacle Connector

Molex Part # 15-83-0064

AMP SDL (Shielded Data Link) Connectors for ACCESS.bus

AMP Part # 4-943197-1

I 2 C Plug Connectors

Molex SEMCONN ACCESS.bus Plug

Molex Part # 15-83-1564

AMP SDL (Shielded Data Link) Plug for ACCESS.bus

Bush Amp Part # 520851-1

Ferrule Amp Part # 520433-1

SDL (Shell) Amp Part # 520461-1

SDL (Shell) Amp Part # 520460-1

SDL Amp Part # 4-520424-1

The following I 2 C Cables are available from MCC

MCC Part # CAB4

MCC Part # CAB8

MCC Part # CAB16

MCC Part # CABCL

I 2 C Interface Cable, 48inches (4ft)

I 2 C Interface Cable, 96 inches (8ft)

I 2 C Interface Cable, 192 inches (16ft)

I 2 C and SMBus Clip Lead Cable

Declaration of Conformity

This Declaration of Conformity is issued by the indicated company which is solely responsible for the declared compliance.

Product(s): iPort/USB and iPort/ DLL/USB

Product Part Number(s): MIIC-204 and MIIC-201D/U

Product Description: I2C Bus Host Adapter

Applicable Directive(s): EC Directive 89/336/EEC

Compliant Standards:

EN 55022 : 1998

Emissions Standard

Conducted Emissions (Class B)

Radiated Emissions (Class B)

EN 55024 : 1998

Immunity Standard

Immunity to Radiated Electromagnetic Fields

Immunity to Fast Transient Bursts - AC Power Lines

Immunity to Conducted Field - AC Power Lines

Immunity to Voltage Dips - AC Power Lines

Immunity to Electrostatic Discharge

Test Laboratory Information:

Cass Industries Ltd., Blackbrook Trading Estate, Weybrook Road, Manchester M19 2QD,

ENGLAND.

Test Report Number: CI02780

Test Report Date: April 6th, 2006

Technical file held by: Micro Computer Control Corporation, 17 Model Avenue / PO Box 275,

Hopewell, New Jersey 08525 USA, or its applicable authorized distributor or representative.

Responsible Company: Micro Computer Control Corporation, 17 Model Avenue / PO Box 275,

Hopewell, New Jersey 08525 USA, or its applicable authorized distributor or representative.

Signature of Authorized Representative:

Name: Edward Thompson

Title: President, Micro Computer Control Corporation

Date: 09-JAN-07

Key features

USB 2.0 interface
Supports I2C Master and Slave modes
User-selectable I2C bit rates
Compatible with 3.3V and 5V I2C Bus voltages
Internal switch-enabled pull-up resistors
Includes iPort Message Center and Message Manager software

Frequently asked questions

Windows 98se, 2000, XP, or higher.

100mA at +5V when powered by USB, 250mA at +5V with external power supply.

iPort Message Center and Message Manager applications.

They are used in I2C Bus systems based on open-collector technology, providing pull-up functionality on the SCL, SDA, and /INT lines. They can be enabled or disabled via a switch.