At 11:04 AM 2/13/2003 -0600, you wrote:
>unfortunately I need to go over this again
>
>I am trying to hook up an I2C A/D converter,
>and the SDA and SCL lines show a 2K resistor
>on their example, but the example is using 2.7 to 3.6 vdc
>supply.
>
>So, this can't be what's needed for a 5 vdc supply, can it?

The value of the pullup resistors depends mostly on the capacitance
of the entire bus and the speed required. Input levels on I2C are
fractions of the supply voltage, so they scale.

See Philips application notes, for example, or there might be a FAQ
available.

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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