Calibre UK PCI93 I2C, PCI90 I2C User Manual

CALIBRE

PCI93 I2C Communications Adapter

Issue 1.1

06/03/2007

 Calibre UK Ltd 2007

CALIBRE

Welcome to the Calibre PCI93 adjustable voltage I2C adapter. This adapter provides full I2C bidirectional compatibility as either a master or slave from within a Windows 95/98 or Windows NT or Windows 2000 or Windows XP environment.

If you have any queries relating to this or any other I2C product supplied by Calibre please visit our web site www.calibreuk.com.

For technical support please e-mail techsupport@calibreuk.com or send your queries by fax to (44) 1274 730960, for the attention of our I2C Technical Support Department.

This document and the software described within it are copyrighted with all rights reserved. Under copyright laws, neither the documentation nor the software may be copied, photocopied, reproduced, translated, or reduced to electronic medium or machine readable form, in whole or in part, without prior written consent of Calibre UK Ltd ("Calibre"). Failure to comply with this condition may result in prosecution. Calibre does not warrant that this software package will function properly in every hardware/software environment. For example, the software may not work in combination with modified versions of the operating system or with certain network adapter drivers. Although Calibre has tested the software and reviewed the documentation, CALIBRE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS SOFTWARE OR DOCUMENTATION, THEIR QUALITY, PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. THIS SOFTWARE AND DOCUMENTATION ARE LICENSED 'AS IS', AND YOU, THE LICENSEE, BY MAKING USE THEREOF, ARE ASSUMING THE ENTIRE RISK AS TO THEIR QUALITY AND PERFORMANCE. IN NO EVENT WILL CALIBRE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE OR DOCUMENTATION, even if advised of the possibility of such damages. In particular, and without prejudice to the generality of the foregoing, Calibre has no liability for any programs or data stored or used with Calibre software, including costs of recovering such programs or data.

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All trade marks acknowledged

Calibre operates a policy of continued product improvement, therefore specifications are subject to change without notice as products are updated or revised.

E&OE.

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Contents

INTRODUCTION 1

1.1. General Introduction 1

1.2. Packing List 1

1.3. Configuring the Adapter 1

1.4. Bus Termination and Protection 1

1.5. Connecting the Adapter to your System 2

1.6. Bus Capacitance Limitations/Cable Choice 2

1.7. Variable Voltage Bus Power Supply 2

INSTALLING THE ADAPTER UNDER WINDOWS 9x 3

2.1. Introduction 3

2.2. Installing the Adapter 3

2.3. Windows 95 Versions 950 and 950a 3

2.4. Windows 95 Versions 950b and 950c 3

2.5. Windows 98 3

2.6. Plug and Play Does Not Find Hardware 4

2.7. Windows 9x File Location 4

INSTALLING THE ADAPTER UNDER WINDOWS NT4 5

3.1. Introduction 5

3.2. Installing the Adapter 5

3.3. Installing the Device Driver 5

3.4. WinNT4 File Location 5

INSTALLING THE ADAPTER UNDER WINDOWS 2000 and XP 6

4.1. Introduction 6

4.2. Installing the Adapter 6

4.3. Installing the Device Driver 6

LIBRARIES FOR PROGRAMMING IN MICROSOFT WINDOWS ENVIRONMENTS 7

5.1. Introduction 7

5.2. Function Prototypes 7

5.3. Function Description 7

5.3.1. setup 7

5.3.2. sendaddress 8

5.3.3. writebyte 8

5.3.4. readbyte 8

5.3.5. sendstop 9

5.3.6. restart 9

5.3.7. getstatus 10

5.3.8. recover 10

5.3.9. slavelastbyte 10 The Real-Time Bus Monitor 11 Appendix A I2C Communications Adapter Status Codes 12 THE MOST COMMONLY ASKED I2C QUESTIONS 13

General Questions 13 Windows Questions 13

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INTRODUCTION

1.1. General Introduction

The I2C Communications Adapter is a PCI bus PC interface card designed to fit any IBM PC compatible. Based on the Philips PCF8584 bus controller, it features full I2C bi-directional compatibility as either a master or slave. I2C connections are made via a 9 way “D” socket. This product complies with the requirements of EEC Directive 89/336 for EMC and is CE marked.

1.2. Packing List

Your I2C Communications Adapter is supplied with the following items: A. I2C CD ROM B. The PCI93 plug-in card (the actual adapter)

1.3. Configuring the Adapter

NOTE MANY COMPONENTS ON THE ADAPTER CARD ARE STATIC SENSITIVE. OBSERVE NORMAL STATIC SENSITIVE PRECAUTIONS WHEN HANDLING THE CARD!

The adapter is supplied in a standard configuration which should suit most applications. However, some features are link selectable. Read the following section to change the configuration.

1.4. Bus Termination and Protection

In 2006 the PCI I2C adapters were redesigned so that they complied with the RoSH Directive PCBs earlier than 2.1 are not RoHS compliant version 2.1 and later are. At this time improvements were made to the manufacturability of the product and to the output protection. None of the changes made to the I2C adapters in anyway functionally alters the product, but the jumper settings are different this section details both settings please check the PCB to determine which version of PCB you have. If you are unsure please contact you sales representative.

PCB Issue up to and including 2.0

Normally the system to which the I2C Communications Adapter is to be connected should already have master pull up resistors fitted to the SCL and SDA lines. If this is not the case, LK10 and LK12 can be used to connect 4K7 pull up resistors to the 5V supply on these lines. The standard configuration is with these resistors disconnected.

The SCL and SDA lines are protected by 100R series resistors before exiting the adapter via the 9 way “D” socket. Upstream of the series resistors, the SCL and SDA lines are pulled up with high value resistors (10K). These resistors can be linked out via links 9 and 11 although to ensure that the I2C Bus is in a defined state even if no other devices are connected the links should be left on. This is the standard configuration.

LK13 and LK14 connect optional protection diodes to the SCL and SDL lines. When selected, these lines are clamped to the 0V and +5V lines giving protection against transients. If these diodes are connected, the external I2C system will not function if the adapter is connected but not powered up. The standard configuration is with these diodes disconnected.

PCB Issue 2.1 and later

Normally the system to which the I2C Communications Adapter is to be connected should already have master pull up resistors fitted to the SCL and SDA lines. If this is not the case, LK5 and LK6 can be used to connect 4K7 pull up resistors to the 5V supply on these lines. The standard configuration is with these resistors disconnected.

The SCL and SDA lines are protected by 100R series resistors before exiting the adapter via the 9 way “D” socket. Upstream of the series resistors, the SCL and SDA lines are pulled up with high value resistors (10K). These resistors can be linked out via links 3 and 4 although to ensure that the I2C Bus is in a defined state even if no other devices are connected the links should be left on. This is the standard configuration.

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1.5. Connecting the Adapter to your System

All external connections are made via a 9 way “D” socket:

Pin Normal Mode 1 0V 2 0V 3 0V 4 0V 5 NC 6 SDA (Bi-directional) 7 +V (variable voltage) 8 SCL (Bi-directional) 9 NC

1.6. Bus Capacitance Limitations/Cable Choice

The maximum allowable capacitance on the I2C bus in normal mode depends on the value of the SCL and SDA master pull-ups, but never exceeds 400pF. Refer to Phillips Technical Handbook Book 4 Parts 12a and 12b for further details. Care should be taken in choosing a length and type of interconnecting cable, which will not exceed this limit.

For most systems with a distance of a few metres between the I2C Communications Adapter and the target system, screened cable is NOT recommended, as it is likely to introduce too much capacitance. However, the EMC performance of an unscreened cable is always potentially poorer than a screened one. The Adapter's EMC performance even with an unscreened cable is good - but this may not be true of the target system! If you are in any doubt at to the best way to connect up your system with EMC in mind please contact your supplier or Calibre for advice.

1.7. Variable Voltage Bus Power Supply

Pin 7 on the “D” connector is connected to the variable bus voltage power rail. Power for external circuitry can be drawn from here, but care should be taken never to short it to 0V or to exceed 250mA loading. It is short circuit and overload protected by a self-resetting thermal fuse but prolonged shorting could cause the PCI93 to generate an excessive amount of heat inside your computer.

When shipped to you, the bus voltage was pre-set at 3.3V for use with low voltage memories. You can adjust the voltage between 2V and 6V by inserting a small screwdriver through the hole in the card mounting bracket. As you adjust the voltage (you can monitor it by connecting a meter to pin 7 of the bus connector) the bus logic levels will track, keeping at 30% / 70% of supply for low and high level thresholds respectively.

Your PCI93 has been factory set for use on 3.3V I2C bus systems. Use on 5V I2C bus systems without adjusting the voltage control WILL CAUSE PERMANENT DAMAGE to the PCI93. The fault is factory detectable and you WILL BE CHARGED FOR THE REPAIR.

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INSTALLING THE ADAPTER UNDER WINDOWS 9x

2.1. Introduction

This section details the installation of the PCI93 I2C communications adapter under Windows 95® / 98®.

The appearance of the dialog boxes during the installation of new hardware varies depending on the version of Windows 95 and Windows 98. Consequently this section is slit into 3 parts

Windows 95 versions 950 and 950a Windows 95 version 950b and 950c Windows 98

Which version of Windows you have installed on your machine by click on the My Computer icon with the right mouse button and then selecting Properties.

2.2. Installing the Adapter

Turn off your computer and disconnect it from the mains power supply. Remove the PC cover and then a PCI slot blanking plate.

Insert the card into the PCI slot, ensure that it is fully home and screw the adapter panel into the PC.

Replace the PC cover and reconnect the PC to the mains power supply. Turn the PC on.

2.3. Windows 95 Versions 950 and 950a

When Windows 95 restarts it should detect the new hardware (if this is not so see section 2.6), select

“Driver from disk provided by hardware manufacturer” then click OK

When you see the Install from Disk screen, insert the CD_ROM into the drive. Select the drive letter appropriate to your CD – ROM drive (usually D) browse the CD for the \cd_pci directory. The click OK, Windows will install the drivers for the adapter.

NOW SHUTDOWN YOUR PC

On restarting you PC click on the My Computer icon with the right mouse button and then selecting Properties. Select Device Manager, expand the CaDrv and the select I2C Driver for PCI Devices Click on Properties is the installation was successful the Device Status will say “This device is working properly”.

2.4. Windows 95 Versions 950b and 950c

When Windows 95 restarts it should detect the new hardware (if this is not so see section 2.6), and the Driver Wizard should be displayed.

Insert the CD_ROM into the drive. Follow the wizard instructions, if the wizard fails to find the driver select Other Location. Then follow the wizard instructions to install the unknown device from the CD ROM.

NOW SHUTDOWN YOUR PC

2.5. Windows 98

When Windows 98 restarts it should detect the new hardware (if this is not so see section 2.6), and the Driver Wizard should be displayed.

Select Search for the best driver for your device and click Next.

When the next screen is displayed select CD-ROM drive and Specify a location. Browse the CD for the \cd_pci directory, select the CaDrv.inf file and click Next.

The next screen tells you that Windows has found the driver click Next. On the final screen click Finish.

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+ 11 hidden pages

Calibre UK PCI93 I2C, PCI90 I2C User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual