On Sat, 23 Mar 2002 09:26:59 -0800, Bob Barr wrote: >On Sat, 23 Mar 2002 12:06:32 -0500, Thomas McGahee wrote: > > Ooops, that line should have said: Now fixed. Sorry about that. > >Thanks for the heads-up on this one. I'll try to confirm this later >today. I need a short break from another project anyway. :=3D) > >Regards, Bob > > >>Dear PIC LIST members, >> >>I was setting up a project using the PIC16F876 and believe I have >>discovered an error in the documentation for the 10 bit A/D converter. >> >>According to the documentation regarding bits 3-0 of the ADCON1 = register >>the PCFG value of 0100 should create the following configuration: >> >> >>AN7 AN6 AN5 AN4 AN3 AN2 AN1 AN0 Vref+ Vref- C/R >>_______________________________________________ >> D D D D A D A A AVdd AVss 3/0 >> >> >>Instead, I have found that it creates THIS configuration: >> >> >>AN7 AN6 AN5 AN4 AN3 AN2 AN1 AN0 Vref+ Vref- C/R >>_______________________________________________ >> D D D D D A A A AVdd AVss 3/0 >> >> >>The manual is for both the 16F876 and the 16F877. I am not sure >>if the same situation exists for the 16F877 or not. >> >>Would some of the other PC LIST members verify this anomaly for me? >>I could not find it mentioned in any of the errata sheets. >> >>I have tested it out on three different 16F876 chips, and I get the >>same result with each of them. I would like to know if the same >>error exists for the 16F877, but right now I do not have >>a 16F877 available to me. I am hoping that one of the PIC LIST >>members will experiment and see what result they get. >> >>If this is indeed an error in the manual, then I want to inform the >>PIC LIST members so that others do not have to go through the >>aggravation that I went through trying to find out why their >>circuit/software will not work with the configuration as shown >>in the manual. >> >>Fr. Thomas McGahee -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads