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Serial bus enhances venerable I2C-bus speed.(Koninklijke Philips Electronics N.V)

EDN, May, 2006 by Conner, Margery

by Margery Conner

Since Philips in the early 1980s developed the I2 C as a two-wire, low- to medium-speed communication bus, it has become the de facto standard for onboard communication and, when you bolster it with drivers, for board-to-board communication. However, as communication speeds have increased and interboard and even intercabinet communication have become commonplace, the I2 C bus has been in need of a speed and drive-capacity overhaul. Hoping to bring users up to date and attract a new user base, Philips has now introduced a family of devices based on the Fm (fast-mode-plus) specification. Fm tightens the bus tolerances and timing requirements and allows a top speed of 1 MHz versus 400 kHz for the old version and a...

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