PIC18F1220ESLASHSOSQTP datasheet(19/308 Pages) MICROCHIP

19 / 308 page

DS39605F-page 17

PIC18F1220/1320

OSCCON REGISTER

R/W-0

R(1)

R-0

R/W-0

IDLEN

IRCF2

IRCF1

IRCF0

OSTS

IOFS

SCS1

SCS0

bit 7

bit 0

bit 7

IDLEN: Idle Enable bits

= Idle mode enabled; CPU core is not clocked in power managed modes

= Run mode enabled; CPU core is clocked in Run modes, but not Sleep mode

bit 6-4

IRCF2:IRCF0: Internal Oscillator Frequency Select bits

111

= 8 MHz (8 MHz source drives clock directly)

110

= 4 MHz

101

= 2 MHz

100

= 1 MHz

011

= 500 kHz

010

= 250 kHz

001

= 125 kHz

000

= 31 kHz (INTRC source drives clock directly)

bit 3

OSTS: Oscillator Start-up Time-out Status bit

= Oscillator Start-up Timer time-out has expired; primary oscillator is running

= Oscillator Start-up Timer time-out is running; primary oscillator is not ready

bit 2

IOFS: INTOSC Frequency Stable bit

= INTOSC frequency is stable

= INTOSC frequency is not stable

bit 1-0

SCS1:SCS0: System Clock Select bits

= Internal oscillator block (RC modes)

= Timer1 oscillator (Secondary modes)

= Primary oscillator (Sleep and PRI_IDLE modes)

Note 1: Depends on state of the IESO bit in Configuration Register 1H.

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

PIC18F1220E/SOSQTP Datasheet(PDF) 19 Page - Microchip Technology

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