PIC16F690-ESLASHML datasheet(66/306 Pages) MICROCHIP

66 / 306 page

PIC16F631/677/685/687/689/690

DS41262E-page 64

4.2.5

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.

4.2.5.1

RA0/AN0/C1IN+/ICSPDAT/ULPWU

Figure 4-2 shows the diagram for this pin. The

RA0/AN0/C1IN+/ICSPDAT/ULPWU pin is configurable

to function as one of the following:

• a general purpose I/O

• an analog input for the ADC (except PIC16F631)

• an analog input to Comparator C1

• In-Circuit Serial Programming™ data

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

FIGURE 4-1:

BLOCK DIAGRAM OF RA0

I/O Pin

VDD

VSS

VDD

Weak

RD PORTA

IOCA

Interrupt-on-Change

To Comparator

Analog(1)

Input Mode

RABPU

Analog(1)

Input Mode

IULP

WPUA

Data Bus

WPUA

PORTA

TRISA

PORTA

Note 1:

ANSEL determines Analog Input mode.

Not implemented on PIC16F631.

+VT

ULPWUE

To A/D Converter(2)

VSS

PIC16F690-E/ML Datasheet(PDF) 66 Page - Microchip Technology

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