Comparator

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YAN-1

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Hi. I was trying to choose between the 16F877 and the 16F877A. I just don't understand the comparator additional feature in the 16F877A. Doesn't the 16F877 have a CCP module (that includes a comparator). thanks
 
YAN-1 said:
Hi. I was trying to choose between the 16F877 and the 16F877A. I just don't understand the comparator additional feature in the 16F877A. Doesn't the 16F877 have a CCP module (that includes a comparator). thanks
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This is A's Additional function (Analog Comparator - mostly it's not used). If you are designing new project, head to A version!
 
I'm sorry but I'm not sure I get this. If I want to compare 2 analog voltages, can't I use the CCP module in the 16F877?
 
Oh I see . I feel stupid!
But if I use the comparator module of the 16F877A, can I still use the A/D module in the same PIC? I am asking because they both seem to use RA2 and RA3 as their references. Thanks.
 
YAN-1 said:
Oh I see . I feel stupid!
But if I use the comparator module of the 16F877A, can I still use the A/D module in the same PIC? I am asking because they both seem to use RA2 and RA3 as their references. Thanks.
Click to expand...
You can use both A/D and Comparators at once. A/D will give you Absolute value and Comparator will just signalise which one is greater...
 
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