I am confuse

[mackrackit]

I picked up the below method of reading the ADC here
http://www.rentron.com/PICX2.htm
I like it much better than ADCIN.

The below code is an example for reading ADC channel 0. Look at the example on the above link to add other channels.

It looks like a lot of stuff to do to read the ADC, pretty much what ADCIN does behind the scenes. This way you have control.
The "READ_AD" part is only needed once no matter how many channels you are reading (reusable).

Use your LCD or SERIAL to see what is happening. I have this running at 2400 baud. Works OK with the internal OSC for testing.

[color=#000000]    '16F88 ADC TEST  FOR CHANNEL 0
    DEFINE OSC 4           
    OSCCON = %01100000
    @ __config _CONFIG1, _INTRC_IO & _WDT_OFF & _LVP_OFF & _MCLR_OFF &_CP_OFF
    ANSEL = %00001111
    TRISA = %11111111
    CHAN0  VAR WORD   'VAR TO HOLD ADC0 READING
    START:
    HIGH PORTB.3    'HEART BEAT
    PAUSE 250
    LOW PORTB.3
    PAUSE 250
    'BELOW WILL SHOW WHAT THE ADRESH AND ADRESL REGISTER HOLDS
    SEROUT2 PORTB.2, 16780, ["ADRESH ",DEC ADRESH," ADRESL ",DEC ADRESL,$a,$d]
    PAUSE 50
    'BELOW SHOWS THE 10 BIT READING OF ADC0 IN VAR CHAN0
    SEROUT2 PORTB.2, 16780, ["CHAN0 ",DEC CHAN0,$a,$d]
    GOSUB ADC_0      'STARTS THE READING OF ADC CHANNEL 0
    GOTO START
    
    ADC_0:       'READ AN0
    ADCON1 = %10000000      'SET FOR 10 BIT
    ADCON0 = %00000001      'TURNS ADC ON
    GOSUB   READ_AD
    CHAN0.HighByte = ADRESH  'PLACES THE HIGH AND LOW BYTE
    CHAN0.LowByte  = ADRESL   'INTO VAR CHAN0
    RETURN
    
    READ_AD:   'DOES THE ADC CONVERSION
    PAUSE   50
    ADCON0.2 = 1
    PAUSE   50
    RETURN