> Hello gang
> Have a pic 18f452 that is talking to some i2c periphials. The devices
> are ack'ing but only pulling the line to about .3 of vcc on one device
> and .6 on the other 12c device. I know that this is an ack because if I
> change the address the poor attempt at acknowlegement dissapears.
>
> Should the line be pulled to 0 v and if not how low would you expect the
> data line to go during an ack.
> Any suggestions appreciated as the pic won't see the .6 of vcc ack as an
> ack!

        What pullups are you using? Sounds like you might be using pullups that are
too strong for the chips in question. Check the spec for the I2C chips you
are using for the recommended pullups. TTYL

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