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Control SMBus with LJ

SMBus Labjack

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#1 fabbro12

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Posted 13 August 2014 - 06:28 AM

Dear all,


I am new in the forum. Some time ago I was used to work on a data acquisition system based on a U6 LJ. For my new job, we need to build a new acquisition data system, and, remembering the previous one, I am thinking on buying the LJ U3 to acquire and condition signals. 

The problem is that we have some SMBus devices to control and to communicate with, and we need an interface PC-SMBus. I see that LJ has interface for I2C but not for SMBus. I know they are more or less compatible, but can I really use I2C to make the job with SMBus without having to convert data, signals, and threshold etc, which of course will cost me a lot of work? Or maybe better to get another device with SMBus interface?

Thanks to all for your help.

#2 LabJack Support

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Posted 14 August 2014 - 01:15 AM

Usually I2C hardware can run SMBUS just fine. However, the extra protocol layer added by SMBUS will have to be implemented in software. Here is a good paper on the differences: http://www.ti.com/li...132/sloa132.pdf

Also tagged with one or more of these keywords: SMBus, Labjack

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