Re: [avr-chat] AVR and accelarometers

[David Kelly]

On Sat, Nov 17, 2007 at 08:26:39PM +0100, Vincent Trouilliez wrote:
> On Sat, 17 Nov 2007 12:38:42 -0600
> David Kelly <address@hidden> wrote:
> > IIRC the history of I2C was that it was created in retaliation for  
> > Apple not freely licensing Apple Desktop Bus. I2C never caught on as a  
> > keyboard/mouse interface but is widely used for other things such as  
> > temperature sensors.
> 
> Hi David,
> 
> When I learned the I2C bus at school 10 years ago, I bought a nice book
> about it, written by a French fellow, Dominique Paret, who says he was
> involved in the design of that Bus at Philips.
> He says they designed it in the early 80's mainly to connect
> integrated circuits cheaply, in high volume appliances (TV's, CD
> players to start with, to satisfy Philips own products of that time).
> He then explains that the qualities of the bus were quickly recognised
> and so, many companies quickly started using it and bought licenses to
> develop IC's featuring this interface.
> Then, among these companies interested in using this bus, was
> Digital/DEC, who signed an agreement with Philips, to derive their own
> bus, the "Access.BUS", to put together all the peripherals of their
> computer, mouse, keyboard etc.
> He says the Access.bus is very close to the I2C bus, directly
> compatible electrically-wise, and very close protocol-wise.
> 
> So I think maybe your memory meant "Access.Bus" instead of I2C ? ;-)

That very well could be it. That I2C needed a bit more transmission line
ruggedness to suffice where consumers might be yanking and connecting
cables higgely piggely.

-- 
David Kelly N4HHE, address@hidden
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Whom computers would destroy, they must first drive mad.