Hi There,
By this question im presuming youre asking if the altimeter readings/data are fed TO the CADC ?
If I remember correctly the altimeter setting is NOT an input to the Central Air Data Computer (CADC).
If I recall correctly the Pitot, Static, Total Air Temp sensors and CADC power were the primary inputs to the CADC.
There are probably some more including the weight on wheels system etc but the above are the primary ones.
The CADC is fed by both the captains and FO's static and pitot primary and secondary lines. Using various calculations on the inputted data it can output to the various instruments which includes the altimeter. Im pretty sure the altimeter gets info *FROM* the CADC as opposed to feeding info *TO* the CADC.
Hope this helps .... and that my memory is correct !!!
T.