I2C pull-up resistors value with two or more devices ?

Nov 26, 2003 20 Replies

Even then, it wouldn't make a difference where this 10k resistor is placed.

Not an issue. Equipment has to conform to certain standards, for instance EN61000-6-1 or -6-3 or FCC Part X, which clearly say what fieldstrength is to be tolerated (3V/m for 'normal' stuff and 10V/m for marine stuff, for instance). And whether a circuit is susceptible to that kind of fieldstrength is more a matter of proper PCB design and screening than a 10k resistor on the right spot. Believe me, the load of a 10k resistor doesn't have much influence on received RF by a PCB track when this track is connected to cmos IC's.

Meindert

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