On Sat, 17 Nov 2007 12:38:42 -0600 David Kelly <[EMAIL PROTECTED]> 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 ? ;-) Regards, -- Vince _______________________________________________ AVR-chat mailing list AVR-chat@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-chat
