PIC18LF4331 datasheet(36/392 Pages) MICROCHIP

36 / 392 page

PIC18F2331/2431/4331/4431

DS39616D-page 36

 2010 Microchip Technology Inc.

OSCCON: OSCILLATOR CONTROL REGISTER

R/W-0

R(1)

R-0

R/W-0

IDLEN

IRCF2

IRCF1

IRCF0

OSTS

IOFS

SCS1

SCS0

bit 7

bit 0

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

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

IRCF<2:0>:

Internal Oscillator Frequency Select bits

111

= 8 MHz (8 MHz source drives clock directly)

110

= 4 MHz (default)

101

= 2 MHz

100

= 1 MHz

011

= 500 kHz

010

= 250 kHz

001

= 125 kHz

000

= 31 kHz (INTRC source drives clock directly)(2)

bit 3

OSTS:

Oscillator Start-up Timer Time-out Status bit(1)

= 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

SCS<1:0>:

System Clock Select bits

= Internal oscillator block

= Secondary (Timer1) oscillator

= Primary oscillator

Note 1:

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

Default output frequency of INTOSC on Reset.

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