Nxp Semiconductors OM6293 用户手册

UM10323_1

© NXP B.V. 2008. All rights reserved.

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

2

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

signals will be converted back to conventional I

2

C-bus levels by the ‘remote’ 

P82B96/PCA9600 and both the cable bus and I

2

C-bus signals are available for probing on 

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.

 

NXP Semiconductors; application note; 

PCA9600, Dual bidirectional bus buffer — NXP Semiconductors; 
Product data sheet; 

DIP

Dual In-line Package

ESD

ElectroStatic Discharge

Fm+

Fast-mode Plus

I

2

C-bus

Inter-Integrated Circuit bus

IC

Integrated Circuit

LED

Light-Emitting Diode

PC

Personal Computer

SMBus

System Management Bus

SMD

Surface Mount Device