PIC16F916-I/ML View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F916-I/ML

28/40/44/64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

Microchip Technology 

PIC16F913/914/916/917/946

3.2.1.8 RA7/OSC1/CLKIN/T1OSI

Figure 3-8 shows the diagram for this pin. The RA7 pin

is configurable to function as one of the following:

• a general purpose I/O

• a crystal/resonator connection

• a clock input

• a Timer1 oscillator connection

FIGURE 3-8:

BLOCK DIAGRAM OF RA7

Data Bus

WR PORTA

To OSC2 Oscillator

Circuit

D

Q

CK Q

Data Latch

WR TRISA

FOSC = 10x

D

Q

CK Q

TRIS Latch

RD TRISA

FOSC = 011

VDD

FOSC = 10x

TTL

Input Buffer

I/O Pin

VSS

RD PORTA

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

Value on

POR, BOR

ADCON0

ADFM VCFG1 VCFG0 CHS2

CHS1

CHS0 GO/DONE ADON 0000 0000

ANSEL

ANS7

ANS6

ANS5

ANS4

ANS3

ANS2

ANS1

ANS0 1111 1111

CMCON0

CONFIG(1)

C2OUT

CPD

C1OUT

CP

C2INV

MCLRE

C1INV

PWRTE

CIS

WDTE

CM2

FOSC2

CM1

FOSC1

CM0

FOSC0

0000 0000

—

OPTION_REG RBPU INTEDG T0CS

T0SE

PSA

PS2

PS1

PS0

1111 1111

LCDCON

LCDEN SLPEN WERR VLCDEN

CS1

CS0

LMUX1 LMUX0 0001 0011

LCDSE0

SE7

SE6

SE5

SE4

SE3

SE2

SE1

SE0

0000 0000

LCDSE1

SE15

SE14

SE13

SE12

SE11

SE10

SE9

SE8

0000 0000

PORTA

RA7

RA6

RA5

RA4

RA3

RA2

RA1

RA0

xxxx xxxx

SSPCON

WCOL SSPOV SSPEN

CKP

SSPM3 SSPM2 SSPM1 SSPM0 0000 0000

T1CON

T1GINV TMR1GE T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON 0000 0000

TRISA

TRISA7 TRISA6 TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 1111 1111

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

Note 1: See Configuration Word register (CONFIG) for operation of all register bits.

Value on all

other Resets

0000 0000

1111 1111

0000 0000

—

1111 1111

0001 0011

uuuu uuuu

uuuu uuuu

uuuu uuuu

0000 0000

uuuu uuuu

1111 1111

DS41250F-page 52

© 2007 Microchip Technology Inc.

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