>Alll this stuff is in the data sheet, of course:

>First, there has to be at least a 2V difference between Vref+ and
>Vref-. Vref+ can range from Vdd - 2.5V to Vdd + 0.3V, Vref- can range
>from Vss - 0.3V to Vref+ - 2.0V.

Perhaps you could point me at which page of the 16F87x data sheet it is on
then, because the only reference to the value of Vref I could find was on
page 175 of DS30292c where the clock freq is given for Vref >= 3V. The
reference manual (DS33023a) does not seem to contain any more than the data
sheet that I could see which is why I asked the question. The mode I want to
use does not seem to be mentioned anywhere at all.

Appreciate your figures anyway.

thanks

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