NXP Semiconductors PCA9600, OM6293 User Manual

UM10323

PCA9600 demonstration board OM6293

Rev. 01 — 15 December 2008 User manual

Document information

Info Content
Keywords I2C, bus buffer, twisted pair
Abstract The OM6293 is an add-on to NXP Semiconductors I2C 2005-1 demo board.

This daughter board makes it easy to test and design with the PCA9600, a
dual bidirectional bus buffer.

NXP Semiconductors

UM10323

PCA9600 demonstration board OM6293

Revision history

Rev Date Description

01 20081215 user manual; initial release

Contact information

For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [e-mail]

UM10323_1 © NXP B.V. 2008. All rights reserved.

User manual Rev. 01 — 15 December 2008 2 of 9

NXP Semiconductors

1. Introduction

The OM6293 evaluation board features RJ45 jacks for easy setup and demonstration of
the bus buffer capabilities of the PCA9600. It can be easily connected to other boards with
off-the-shelf telephone or networking twisted pair wires.

UM10323

PCA9600 demonstration board OM6293

The IC communicates to the host via the I
capacitive handling, increases the current handling, extends the range, and/or allows

2

I

C-bus signaling via differential bus hardware.

2. Features

• A complete evaluation platform for the PCA9600

• Easy to integrate daughter card

• Convenient test point for easy scope measurements and signal access

3. Getting started

3.1 Assumptions

Familiarity with the I2C-bus is recommended. It is also recommended that the user read
Application Note AN10658, which covers other design considerations such as timing
delays, maximum data transmission speeds, handling gr ound potential differences and
designing for extreme ESD requirements.

3.2 Static handling requirements

2

C-bus/SMBus port and extends the buses’

CAUTION

This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken
during transport and handling. You must use a ground strap or touch the PC case or other
grounded source before unpacking or handling the hardware.

3.3 System requirements

The OM6293 daughter card can be used with the Windows based OM6275 I2C 2005-1
demo board, the microcontroller-based OM6299 industrial reference design board, or
stand-alone in the user’s application.

3.4 Power supply

When connected to the OM6275 I2C 2005-1 demo board or the OM6299 industrial
reference design board, the OM6293 can draw power from the host board through the
5 V pin on connector 3 (CON3).

An external power supply can also be used to power the board at location J1. The external
power supply can range from 2.5 V to 15 V.

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User manual Rev. 01 — 15 December 2008 3 of 9

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4. Schematic

NXP Semiconductors

CON4

1234567

1234567

CON3

V

8

9

CC

V

V

CC

CC

V

5 V

n.c.

5 V

R1

2.7 kΩR22.7 kΩ

VCC

J1

123

V

CC

R3
Axial

R4

CC

R7
Axial

V

CC

V

CC

V

CC

V

CC

CON1

1
2

R8

R5
150R

R9
150R

3
4
5
6
7
8

8

PCA9600

Sx

Sy

GND

Sx

Sy

GND

1

7

4

IC1

J2

Sx

1

V

8

9

CC

C1
100 nF

Rx
Tx

GND

8

2

7

3

6

4

5

V
Sy
Ry
Ty

CC

Tx

3

Rx

2

Ty

5

Ry

6

D1
Axial

Tx

Rx

1

Ty

Ry

2

BZX84C15D2BAT54A

D3A

D4
Axial

R6

1 kΩ

D5

BZX84C15

R10

1 kΩ

D3B

BAT54A

3

4

V

CC

CON2

1
2
3
4
5
6
7
8

002aae284

PCA9600 demonstration board OM6293

Fig 1. OM6293 PCA9600 evaluation board

UM10323

NXP Semiconductors

UM10323

PCA9600 demonstration board OM6293

Fig 2. OM6293 fitted to the 9-pin header on OM6275 I2C 2005-1

5. Bill of materials

Table 1. Bill of materials

Part type Designator Footprint Description

2.54 mm 4×2 way header J2 4×2 way 2.54 mm PIN HEADER Test point connector
Molex 22-28-6270 CON4 9 way 2.54 mm PIN HEADER 9-pin connector
Molex 22-15-2096 CON3 9 way 2.54 mm PIN SOCKET 9-pin socket

Multicomp 7005-8P8C CON2 RJ-45 8TH RJ-45 8 way connector
Multicomp 7005-8P8C CON1 RJ-45 8TH RJ-45 8 way connector
1kΩ R10 R0805 SMD resistor
1kΩ R6 R0805 SMD resistor

2.7 kΩ R1 R0805 SMD resistor

2.7 kΩ R2 R0805 SMD resistor
100 nF C1 C0805 SMD capacitor
150R R9 R0805 SMD resistor
150R R5 R0805 SMD resistor

BAT54A D3A SOT23 Schottky diode
BAT54A D3B SOT23 Schottky diode
BZX84C15 D5 SOT23 user installed SMD Zener diode

R8 R0805 SMD resistor
R4 R0805 SMD resistor

R7 AXIAL VR25(0.4) user installed leaded resistor
R3 AXIAL VR25(0.4) user installed leaded resistor
D1 DIODE SOD57 (0.5) user installed leaded Zener diode
D4 DIODE SOD57 (0.5) user installed leaded Zener diode

UM10323_1 © NXP B.V. 2008. All rights reserved.

User manual Rev. 01 — 15 December 2008 5 of 9

NXP Semiconductors

UM10323

PCA9600 demonstration board OM6293

Table 1. Bill of materials

Part type Designator Footprint Description

BZX84C15 D2 SOT23 user installed SMD Zener diode

2.54 mm 3 way header J1 3 way 2.54 mm PIN STRIP supply selector header
PCA9600 IC1 SO8 dual bidirectional bus buffer
OMRON A6T-4104 S1 DIP8 DIP switch

…continued

6. Using the OM6293 with the I2C 2005-1 demo board

The board can be easily configured to demonstrate two common applications:

• Generating an Fm+ compatible drive signal for other application boards, and

• Driving long Cat5e communication cables in ‘4-signal’ mode using two daughter

boards.

6.1 Generating an Fm+ compatible drive signal

A single daughter board is fitted to the 9-pin expansion header of the I2C 2005-1
evaluation board and can be powered from the switched 5 V supply on that board.

The I2C 2005-1 evaluation board’s 9-pin header signals are duplicated on the daughter
board’s 9-pin header CON4 to allow further expansion or connection of other daughter
cards.

The P82B96/PCA9600 generates Fm+ signals on the 8P8C modular (RJ45) jack CON1
that are compatible with, for example, the PCA9633 LED Demo Board Fm+ signals. To
select this option, it is necessary to close switches 1 and 2 on the DIP switch S1 and to
open switches 3 and 4. (The RJ45 jack CON2 should not be used.)

The 5 V power selection jumper should be fitted between pins 2 and 3 on header J1.
The input signals from the I2C 2005-1 evaluation board and the corresponding Fm+

signals as delivered to the RJ45 jack CON1 are available for probing on the 8-pin header
J2.

For further details on this setup, refer to the Application Note AN10658, section 3.1.

6.2 Driving long Cat5e cables in 4-signal mode

One board is fitted to the 9-pin expansion header of the I2C 2005-1 evaluation board and
can be powered from the switched 5 V supply of that board by fitting the jumper between
pins 2 an d 3 on header J1.

The board is configured for driving long Cat5e cables by opening switches 1 and 2 on the
DIP switch S1 and closing the switches 3 and 4. The cable to be driven, fitted with
standard 8P8C modular connectors (RJ45), is fitted into the RJ45 jack CON1.The other
end of the cable is fitted into the RJ45 jack CON2 of a second or ‘remote’
P82B96/PCA9600 daughter board. This ‘remote’ board will derive its 5 V supply from the
first board, via the cable and CON2. Use of CON2, with its different wiring configuration,
provides the necessary crossover linking from Tx on one board to Rx on the other.

UM10323_1 © NXP B.V. 2008. All rights reserved.

User manual Rev. 01 — 15 December 2008 6 of 9

NXP Semiconductors

Ensure that the 5 V power selection jumper is fitted between pins 2 and 3 on header J1 or
that some alternative logic supply voltage is connected to pin 2 on J1 so that there is a
supply voltage for the I
signals will be converted back to conventional I
P82B96/PCA9600 and both the cable bus and I
the 8-pin header J2. They are also available on the 9-pin header CON4 in the same
format as on the I2C 2005-1 expansion header.

Note that only the ‘switched 5 V’ supply from the I2C 2005-1 board is used on
CON1/CON2. The un-switched 5 V and 3.3 V supplies are not available on the Cat5e
cable and therefore are not available on CON4 in modes where boards are linked only by
the Cat5e cable.

For further details on this setup, refer to Application Note AN10658, section 3.2.

7. Abbreviations

Table 2. Abbreviations

Acronym Description

DIP Dual In-line Package
ESD ElectroStatic Discharge
Fm+ Fast-mode Plus

2

C-bus Inter-Integrated Circuit bus

I
IC Integrated Circuit
LED Light-Emitting Diode
PC Personal Computer
SMBus System Management Bus
SMD Surface Mount Device

UM10323

PCA9600 demonstration board OM6293

2

C-bus on the Sx/Sy side of this ‘remote’ board. The cable bus

2

C-bus levels by the ‘remote’

2

C-bus signals are available for probing on

8. References

[1] AN10658, Sending I2C-bus signals via long communications cables —

NXP Semiconductors; application note;

www.nxp.com/acrobat/applicationnotes/AN10658

[2] PCA9600, Dual bidirectional bus buffer — NXP Semiconductors;

Product data sheet; www.nxp.com/pip/PCA9600

UM10323_1 © NXP B.V. 2008. All rights reserved.

User manual Rev. 01 — 15 December 2008 7 of 9

NXP Semiconductors

9. Legal information

UM10323

PCA9600 demonstration board OM6293

9.1 Definitions

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.

9.2 Disclaimers

General — Information in this document is believed to be accurate and

reliable. However, NXP Semiconduct ors does not give any repr esentatio ns or
warranties, expressed or implied, as to the accuracy or completeness of such
information and shall have no liability for the consequences of use of such
information.

Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.

Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonabl y be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
therefore such inclusion and/or use is at the customer’s own risk.

Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.

9.3 T rademarks

Notice: All referenced brands, prod uct names, service names and trad emarks
are the property of their respective owners.

2

I

C-bus — logo is a trademark of NXP B.V.

UM10323_1 © NXP B.V. 2008. All rights reserved.

User manual Rev. 01 — 15 December 2008 8 of 9

NXP Semiconductors

10. Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.1 Assumptions. . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.2 Static handling requirements . . . . . . . . . . . . . . 3

3.3 System requirements . . . . . . . . . . . . . . . . . . . . 3

3.4 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . 3

4 Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

5 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . 5

6 Using the OM6293 with the I2C 2005-1

demo board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6.1 Generating an Fm+ compatible drive signal. . . 6

6.2 Driving long Cat5e cables in 4-sign al mode . . . 6

7 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . 7

8 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

9 Legal information. . . . . . . . . . . . . . . . . . . . . . . . 8

9.1 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

9.2 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

9.3 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

10 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

UM10323

PCA9600 demonstration board OM6293

Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.

© NXP B.V. 2008. All rights reserved.

For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [e-mail]

Date of release: 15 December 2008

Document identifier: UM10323_1