PIC18F2220-ISLASHML datasheet(28/388 Pages) MICROCHIP

28 / 388 page

PIC18F2220/2320/4220/4320

DS39599C-page 26

 2003 Microchip Technology Inc.

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 bit

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

= Run mode enabled; CPU core is clocked in power managed modes

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(1)

= Oscillator start-up time-out timer has expired; primary oscillator is running

= Oscillator start-up time-out timer 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)(2)

= Primary oscillator (Sleep and PRI_IDLE modes)

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

2: SCS0 may not be set while T1OSCEN (T1CON<3>) is clear.

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

PIC18F2220-I/ML Datasheet(PDF) 28 Page - Microchip Technology

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