PIC16F882-E/ML データシートの表示（PDF） - Microchip Technology

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PIC16F882-E/ML

28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16F882/883/884/886/887

3.2.3.8 RA7/OSC1/CLKIN

Figure 3-8 shows the diagram for this pin. This pin is

configurable to function as one of the following:

• a general purpose I/O

• a crystal/resonator connection

• a clock input

FIGURE 3-8:

BLOCK DIAGRAM OF RA7

Data Bus

WR

PORTA

DQ

CK Q

WR

TRISA

DQ

CK Q

RD

TRISA

Oscillator

Circuit

OSC1

VDD

INTOSC

Mode

I/O Pin

VSS

RD

PORTA

CLKIN

TABLE 3-1: SUMMARY OF REGISTERS ASSOCIATED WITH PORTA

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Register

on Page

ADCON0

ADCS1 ADCS0 CHS3

CHS2

CHS1

CHS0 GO/DONE ADON

108

ANSEL

ANS7

ANS6

ANS5

ANS4

ANS3

ANS2

ANS1

ANS0

42

CM1CON0

C1ON C1OUT C1OE C1POL

—

C1R

C1CH1 C1CH0

93

CM2CON0

C2ON C2OUT C2OE C2POL

—

C2R

C2CH1 C2CH0

94

CM2CON1

MC1OUT MC2OUT C1RSEL C2RSEL

—

—

T1GSS C2SYNC 96

PCON

—

—

ULPWUE SBOREN

—

—

POR

BOR

38

OPTION_REG RBPU INTEDG T0CS

T0SE

PSA

PS2

PS1

PS0

32

PORTA

RA7

RA6

RA5

RA4

RA3

RA2

RA1

RA0

41

SSPCON

WCOL SSPOV SSPEN

CKP

SSPM3 SSPM2 SSPM1 SSPM0

185

TRISA

TRISA7 TRISA6 TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0

41

Legend: x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by PORTA.

DS41291G-page 48

 2006-2012 Microchip Technology Inc.

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