Datasheet

PIC16F882/883/884/886/887

DS41291G-page 44  2006-2012 Microchip Technology Inc.

3.2.3 PIN DESCRIPTIONS AND

DIAGRAMS

Each PORTA pin is multiplexed with other functions. The

pins and their combined functions are briefly described

here. For specific information about individual functions

such as the comparator or the A/D Converter (ADC),

refer to the appropriate section in this data sheet.

3.2.3.1 RA0/AN0/ULPWU/C12IN0-

Figure 3-1 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

• an analog input for the Ultra Low-Power Wake-up

FIGURE 3-1: BLOCK DIAGRAM OF RA0

I/O Pin

VDD

VSS

To Comparator

Analog

(1)

Input Mode

IULP

Data Bus

PORTA

TRISA

PORTA

Note 1: ANSEL determines Analog Input mode.

TRG

ULPWUE

To A/D Converter

VSS