PIC16F688-E/SL 查看數據表（PDF） - Microchip Technology

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PIC16F688-E/SL

14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F688

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 individ-

ual functions such as the comparator or the A/D, refer

to the appropriate section in this data sheet.

4.2.5.1 RA0/AN0/C1IN+/ICSPDAT/ULPWU

Figure 4-1 shows the diagram for this pin. The RA0 pin

is configurable to function as one of the following:

• a general purpose I/O

• an analog input for the A/D

• an analog input to the comparator

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

• In-Circuit Serial Programming™ data

FIGURE 4-1:

BLOCK DIAGRAM OF RA0

Data Bus

WR

WPUDA

DQ

CK Q

Analog(1)

Input Mode

RAPU

VDD

Weak

RD

WPUDA

VDD

WR

PORTA

DQ

CK Q

I/O PIN

VSS

WR

TRISA

DQ

CK Q

RD

TRISA

RD

PORTA

WR

IOCA

DQ

CK Q

RD

IOCA

Interrupt-on-

Change

-

+

VT

Analog(1)

Input Mode

01

IULP

Vss

ULPWUE

QD

EN

Q3

QD

EN

RD PORTA

To Comparator

To A/D Converter

Note 1: Comparator mode and ANSEL determines analog Input mode.

© 2007 Microchip Technology Inc.

DS41203C-page 37

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