Yep. I got it mixed up with port bits which start at 0 for the LSB.

Maybe that brings up a good point: Use binary when specifying the value. 
It's easier to see which bits are set and which are not set. I do that 
with the TRIS values which makes it easy to see since 1=Input and 0=Output.

IOW, MOVLW B'00000110'

The value of 6 makes everything digital and nothing analog.

At least I still had a good reference. :-)

Joe M.

Mark Perri wrote:
> Joe,
> I think you're shifted 1 bit to the left due to the late hour :)
> Mark
> 
> On 2/16/2010 11:43 PM, MCH wrote:
>> Setting ADCON1 to 6 makes the AN0, 1, and 4 inputs active as analog
>> rather than digital. It also makes AN2's pin Vref- and AN3 Vref+. These
>> are respectively Port A pins 0, 1, 5, 2, and 3. Port E would be all
>> digital in this case. I think they typo'ed and meant ";Load value to
>> make ports A analog&  E digital I/O".
>>
>> If you wanted to make Ports A and E all analog inputs, you would use a
>> value of 0, not 6. Then, AN0-AN7 would be all analog inputs. These are
>> on Port A pins 0/1/2/3/5 and Port E pins 0/1/2.
>>
>> Details on the PIC16F87xA datasheet page 128 (DS39582B). (Chapter 11)
>>
>> Joe M.
>>
>> Joseph Bento wrote:
>>    
>>> I'm looking at Table 4-2 (page 43) in the 16F877A datasheet. I am apparently
>>> missing something in understing WHY 0x06 is used, and what I would choose if
>>> I wanted an analog I/O.  What configuration chart am I overlooking that
>>> describes the settings?
>>>
>>> This is a portion of my code: (I apologize ahead of time for any formatting
>>> issues.)
>>>
>>> start   bsf    STATUS,RP0                 ;Switch to Bank1 for ADCON1
>>>            bcf   STATUS,RP1                 ;Make sure in Bank1
>>>            movlw 0x06                             ;Load value to make ports A
>>> &  E digital I/O
>>>            movwf ADCON1                    ;as opposed to Analog inputs
>>>
>>> Thanks for any clarification anyone can offer.
>>>
>>> Joe
>>>      
> 
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