PIC18F23K20-ESLASHML datasheet(301/456 Pages) MICROCHIP

301 / 456 page

 2010 Microchip Technology Inc.

DS41303G-page 301

PIC18F2XK20/4XK20

CONFIG1H: CONFIGURATION REGISTER 1 HIGH

R/P-0

U-0

R/P-0

R/P-1

IESO

FCMEN

—

FOSC3

FOSC2

FOSC1

FOSC0

bit 7

bit 0

Legend:

R = Readable bit

P = Programmable bit

U = Unimplemented bit, read as ‘0’

-n = Value when device is unprogrammed

x = Bit is unknown

bit 7

IESO: Internal/External Oscillator Switchover bit

= Oscillator Switchover mode enabled

= Oscillator Switchover mode disabled

bit 6

FCMEN: Fail-Safe Clock Monitor Enable bit

= Fail-Safe Clock Monitor enabled

= Fail-Safe Clock Monitor disabled

bit 5-4

Unimplemented: Read as ‘0’

bit 3-0

FOSC<3:0>: Oscillator Selection bits

11xx

= External RC oscillator, CLKOUT function on RA6

101x

= External RC oscillator, CLKOUT function on RA6

1001

= Internal oscillator block, CLKOUT function on RA6, port function on RA7

1000

= Internal oscillator block, port function on RA6 and RA7

0111

= External RC oscillator, port function on RA6

0110

= HS oscillator, PLL enabled (Clock Frequency = 4 x FOSC1)

0101

= EC oscillator, port function on RA6

0100

= EC oscillator, CLKOUT function on RA6

0011

= External RC oscillator, CLKOUT function on RA6

0010

= HS oscillator

0001

= XT oscillator

0000

= LP oscillator

PIC18F23K20-E/ML Datasheet(PDF) 301 Page - Microchip Technology

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