Microchip Technology MCP1631RD-MCC2 Data Sheet

PIC16F882/883/884/886/887

DS41291G-page 46

 2006-2012 Microchip Technology Inc.

3.2.3.4

RA3/AN3/V

REF

+/C1IN+

Figure 3-4

shows the diagram for this pin. This pin is

configurable to function as one of the following:
• a general purpose input
• an analog input for the ADC
• a positive voltage reference input for the ADC and

REF

• a positive analog input to Comparator C1

FIGURE 3-4:

BLOCK DIAGRAM OF RA3

3.2.3.5

RA4/T0CKI/C1OUT

Figure 3-5

shows the diagram for this pin. This pin is

configurable to function as one of the following:
• a general purpose I/O
• a clock input for Timer0
• a digital output from Comparator C1

FIGURE 3-5:

BLOCK DIAGRAM OF RA4

I/O Pin

Analog

(1)

Input Mode

Data Bus

PORTA

TRISA

Note 1:

ANSEL determines Analog Input mode.

To Comparator (V

REF

To Comparator (positive input)

To A/D Converter (V

REF

To A/D Converter (analog channel)

I/O Pin

Data Bus

PORTA

TRISA

C1OUT

Enable

To Timer0