Hello everyone At this moment, I am using the 16C74 in first time, I had made the program, " but i don'r know what happen ". With the MPLAB-sim, all is correct, but in the device the A/D no turn on, I am using only two inputs in Port A like Analog inputs, but only use AN0, the system for the detection of the convertion is with a polling, but i think that the ADRES file is always "0". Other question, with the MPLAB-sim, probing this program, in the polling, the ADIF flag, in the first time is 0, but in the second time is 1, Is a bug? Is right? I don't know. My last question. All I/O is correct programmed, but, in Port C, no recognize the input in bit 6, is possible that is programmed in automatic form like serial port????? Thak you in advantice for your resports, I am crazy with this :-)) Cheers Santiago mailto:sma25@rcua.alcala.es mailto:tendataes@batch-pc.es Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Description: Tarjeta de Santiago Miqano Content-Disposition: attachment; filename="vcard.vcf" Attachment converted: wonderland:vcard.vcf (TEXT/CSOm) (0000C9DE)