Microchip Technology MCP1631RD-MCC2 Data Sheet

 2006-2012 Microchip Technology Inc.

DS41291G-page 45

PIC16F882/883/884/886/887

3.2.3.2

RA1/AN1/C12IN1-

shows the diagram for this pin. This pin is

configurable to function as one of the following:
• a general purpose I/O
• an analog input for the ADC
• a negative analog input to Comparator C1 or C2

FIGURE 3-2:

BLOCK DIAGRAM OF RA1

3.2.3.3

RA2/AN2/V

REF

-/CV

REF

/C2IN+

Figure 3-3

shows the diagram for this pin. This pin is

configurable to function as one of the following:
• a general purpose I/O
• an analog input for the ADC
• a negative voltage reference input for the ADC

and CV

REF

• a comparator voltage reference output
• a positive analog input to Comparator C2

FIGURE 3-3:

BLOCK DIAGRAM OF RA2

I/O Pin

Analog

(1)

Input Mode

Data Bus

PORTA

TRISA

To A/D Converter

Note 1:

ANSEL determines Analog Input mode.

To Comparator

I/O Pin

Analog

(1)

Input Mode

Data Bus

PORTA

TRISA

To Comparator (V

REF

Note 1:

ANSEL determines Analog Input mode.

To Comparator (positive input)

REF

VROE

To A/D Converter (V

REF

To A/D Converter (analog channel)