PIC16F631 datasheet(197/294 Pages) MICROCHIP

197 / 294 page

DS41262D-page 195

PIC16F631/677/685/687/689/690

CONFIG: CONFIGURATION WORD REGISTER

Reserved

FCMEN

IESO

BOREN1(1)

BOREN0(1)

CPD(2

bit 13

bit 7

CP(3)

MCLRE(4)

PWRTE

WDTE

FOSC2

FOSC1

FOSC0

bit 6

bit 0

Legend:

R = Readable bit

W = Writable bit

P = Programmable’

U = Unimplemented

bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 13-12

Reserved: Reserved bits. Do Not Use.

bit 11

FCMEN: Fail-Safe Clock Monitor Enabled bit

= Fail-Safe Clock Monitor is enabled

= Fail-Safe Clock Monitor is disabled

bit 10

IESO: Internal External Switchover bit

= Internal External Switchover mode is enabled

= Internal External Switchover mode is disabled

bit 9-8

BOREN<1:0>: Brown-out Reset Selection bits(1)

= BOR enabled

= BOR enabled during operation and disabled in Sleep

= BOR controlled by SBOREN bit of the PCON register

= BOR disabled

bit 7

CPD: Data Code Protection bit(2)

= Data memory code protection is disabled

= Data memory code protection is enabled

bit 6

CP: Code Protection bit(2)

= Program memory code protection is disabled

= Program memory code protection is enabled

bit 5

MCLRE: MCLR Pin Function Select bit(3)

= MCLR pin function is MCLR

= MCLR pin function is digital input, MCLR internally tied to VDD

bit 4

PWRTE: Power-up Timer Enable bit

= PWRT disabled

= PWRT enabled

bit 3

WDTE: Watchdog Timer Enable bit

= WDT enabled

= WDT disabled

bit 2-0

FOSC<2:0>: Oscillator Selection bits

111

RC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN

110

RCIO oscillator: I/O function on RA4/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN

101

INTOSC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, I/O function on

RA5/OSC1/CLKIN

100

INTOSCIO oscillator: I/O function on RA4/OSC2/CLKOUT pin, I/O function on

RA5/OSC1/CLKIN

011

EC: I/O function on RA4/OSC2/CLKOUT pin, CLKIN on RA5/OSC1/CLKIN

010

HS oscillator: High-speed crystal/resonator on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN

001

XT oscillator: Crystal/resonator on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN

000

LP oscillator: Low-power crystal on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN

Note

Enabling Brown-out Reset does not automatically enable Power-up Timer.

The entire data EEPROM will be erased when the code protection is turned off.

The entire program memory will be erased when the code protection is turned off.

When MCLR is asserted in INTOSC or RC mode, the internal clock oscillator is disabled.

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