At 15:04 03/08/99 +1000, Clyde Smith-Stubbs wrote:
>Ok, maybe I should clarify that - my tests that determined the above were done
>on a 16C71. Maybe the 16C73 and 16C74 are different, but I checked the
>datasheets
>for both the '71 and '74 before posting my message, and the wording about
>the analog inputs is the same. Furthermore I probably didn't test RA3.

now here i'd just like to clarify my understanding of the english language
(even though i agree with you on that i'd probably not rely on it :)

in my data sheets of all the 16c7x series it says "the trisa register
controls the direction of the ra pins, even  when they are being used as
analog inputs" in the porta chapter, and "the port pins that are desired as
analog inputs must have their corresponding tris bits set. if the tris bit
is cleared, the digital output level (Voh or Vol) will be converted" in the
adc chapter.

i read this as that the output level will actually be a digital one (Voh or
Vol) in case the tris bit is cleared (which is consistent with the
schematic of the porta inputs in the data sheets). do you read something
different here?

ge