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tim
Guest
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 Posted:
Tue Dec 21, 2004 2:04 am Post subject:
why not just say I2C? |
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I am currently working with a range of peripherals whos
control lines look remarkably like an I2C interface.
The data sheets go into great detail about how the data and
clock line are used to communicate with the device and how
it has an own 'address' so that you can differentiate it from
other devices etc.......
Why not just say that it's an I2C comptable device FFS.
Do they have to pay Philips some extra money for admitting
that it's I2C rather than pretending that it is something else?
(and is it really still in patent after 20 years?)
sorry rant over.
tim |
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peterk
Guest
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| Posted:
Tue Dec 21, 2004 2:22 am Post subject:
Re: why not just say I2C? |
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Just call it SPI like everybody else. It's probably more of a trademark
than a patent issue in the same way you can't call your latest vacuum
cleaner a Hoover.
Peter |
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Grant Edwards
Guest
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| Posted:
Tue Dec 21, 2004 2:30 am Post subject:
Re: why not just say I2C? |
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On 2004-12-20, peterk <peterk.vt80@gmail.com> wrote:
| Quote: | Just call it SPI like everybody else.
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Because I2C and SPI aren't very similar at all?
--
Grant Edwards grante Yow! I'LL get it!! It's
at probably a FEW of my
visi.com ITALIAN GIRL-FRIENDS!! |
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Guest
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| Posted:
Tue Dec 21, 2004 2:31 am Post subject:
Re: why not just say I2C? |
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SPI is not I2C. SPI is to "three-wire interface" as I2C is to "two wire
interface". Or to put it another way, SPI is to Motorola as I2C is to
Philips.
Also, note that "I2C-like" peripherals are in no way guaranteed to be
FULLY I2C compatible. |
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Spehro Pefhany
Guest
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| Posted:
Tue Dec 21, 2004 2:35 am Post subject:
Re: why not just say I2C? |
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On 20 Dec 2004 13:22:36 -0800, the renowned "peterk"
<peterk.vt80@gmail.com> wrote:
| Quote: | Just call it SPI like everybody else. It's probably more of a trademark
than a patent issue in the same way you can't call your latest vacuum
cleaner a Hoover.
Peter
|
I think you mean "two wire".
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com |
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peterk
Guest
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| Posted:
Tue Dec 21, 2004 3:27 am Post subject:
Re: why not just say I2C? |
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Oops, of course you are right, it's TWI. I should put my brain into
gear before writing.
Peter |
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Gene S. Berkowitz
Guest
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| Posted:
Tue Dec 21, 2004 7:58 am Post subject:
Re: why not just say I2C? |
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In article <cq7eol$ac4$00$1@news.t-online.com>,
520010973502.removethis@t-online.de says...
| Quote: |
I am currently working with a range of peripherals whos
control lines look remarkably like an I2C interface.
The data sheets go into great detail about how the data and
clock line are used to communicate with the device and how
it has an own 'address' so that you can differentiate it from
other devices etc.......
Why not just say that it's an I2C comptable device FFS.
Do they have to pay Philips some extra money for admitting
that it's I2C rather than pretending that it is something else?
(and is it really still in patent after 20 years?)
sorry rant over.
tim
|
Well, yes, they DO have to pay Philips if they use the term "I2C" or
"IIC".
In exchange, Philips grants them a unique device identifier for their
product.
It's also a trademark.
--Gene |
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Mike Harrison
Guest
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| Posted:
Tue Dec 21, 2004 4:27 pm Post subject:
Re: why not just say I2C? |
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On Tue, 21 Dec 2004 00:32:17 -0500, Gene S. Berkowitz <first.last@comcast.net> wrote:
| Quote: | In article <cq7eol$ac4$00$1@news.t-online.com>,
520010973502.removethis@t-online.de says...
I am currently working with a range of peripherals whos
control lines look remarkably like an I2C interface.
The data sheets go into great detail about how the data and
clock line are used to communicate with the device and how
it has an own 'address' so that you can differentiate it from
other devices etc.......
Why not just say that it's an I2C comptable device FFS.
Do they have to pay Philips some extra money for admitting
that it's I2C rather than pretending that it is something else?
(and is it really still in patent after 20 years?)
sorry rant over.
tim
Well, yes, they DO have to pay Philips if they use the term "I2C" or
"IIC".
In exchange, Philips grants them a unique device identifier for their
product.
Not always - only if it is a new type of device - e.g. all eeproms have the same address prefix. |
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Guest
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| Posted:
Wed Dec 22, 2004 7:58 am Post subject:
Re: why not just say I2C? |
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Last I heard, I2C was a registered trademark and you had to pay Philips
for using it. There's a lot of these shenanegans being played -
OneWire, SPI, I2C etc. I think that manufacturers have tried to play by
the rules and still let you know what they mean - Atmel uses the TWI -
Two wire interface that can be used with I2C
But you're right - it is annoying
Tom
tim wrote:
| Quote: | I am currently working with a range of peripherals whos
control lines look remarkably like an I2C interface.
The data sheets go into great detail about how the data and
clock line are used to communicate with the device and how
it has an own 'address' so that you can differentiate it from
other devices etc.......
Why not just say that it's an I2C comptable device FFS.
Do they have to pay Philips some extra money for admitting
that it's I2C rather than pretending that it is something else?
(and is it really still in patent after 20 years?)
sorry rant over.
tim |
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Ulf Samuelsson
Guest
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| Posted:
Thu Dec 23, 2004 2:05 am Post subject:
Re: why not just say I2C? |
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<surftom@hotmail.com> skrev i meddelandet
news:1103688440.284627.4970@f14g2000cwb.googlegroups.com...
| Quote: | Last I heard, I2C was a registered trademark and you had to pay Philips
for using it. There's a lot of these shenanegans being played -
OneWire, SPI, I2C etc. I think that manufacturers have tried to play by
the rules and still let you know what they mean - Atmel uses the TWI -
Two wire interface that can be used with I2C
But you're right - it is annoying
Tom
|
Yes, you should ask Philips to adopt the TWI
so we can have one standard :-)
--
Best Regards,
Ulf Samuelsson ulf@a-t-m-e-l.com
This is a personal view which may or may not be
share by my Employer Atmel Nordic AB |
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tim
Guest
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| Posted:
Mon Jan 03, 2005 5:27 am Post subject:
Re: why not just say I2C? |
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<surftom@hotmail.com> wrote in message
news:1103688440.284627.4970@f14g2000cwb.googlegroups.com...
stupid me for posting the day before I went on my Xmas leave but...
| Quote: | Last I heard, I2C was a registered trademark and you had to pay Philips
for using it.
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Ah ha, so the name is trademarked and you have to pay Philips to
use it, but the invention is (probably) out of patent so you are
free to use it in a design if you don't say so.
Ta
tim |
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