"I2C" versus "IIC"

VanBaren, Gerald (AGRE) Gerald.VanBaren at smiths-aerospace.com
Thu Oct 14 06:18:03 EST 2004

> -----Original Message-----
> From: linuxppc-embedded-bounces at ozlabs.org
> [mailto:linuxppc-embedded-bounces at ozlabs.org] On Behalf Of
> Eugene Surovegin
> Sent: Wednesday, October 13, 2004 3:34 PM
> To: Robert P. J. Day
> Cc: Embedded PPC Linux list
> Subject: Re: "I2C" versus "IIC"
> On Wed, Oct 13, 2004 at 02:26:23PM -0400, Robert P. J. Day wrote:
> >
> >   i was just about to rename some of my variables and macros to be
> > consistent with what i *thought* was the standard nomenclature of
> > "IIC" as opposed to "I2C".  just checked include/asm-ppc,
> and grepped
> > for case-insensitive instances of both strings ... oh, god.
>  there's
> > really no preferred usage, is there?
> Philips' documentation uses I2C, not IIC, so I guess this is
> _official_ name of the _bus_.
> Some vendors (like IBM in their 4xx parts) use IIC to name
> I2C _interface_ to distinguish it from I2C _bus_ (they
> specifically mention this in the chip manual).
> For example, in the corresponding 4xx driver I used "iic"
> because it was written for IBM IIC _interface_.
> --
> Eugene.

Just to mess with your minds... I2C is a trademark of Philips
Electronics N.V. so that is probably not the best choice from a
legalistic point of view.


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