Datasheet

 2011 Microchip Technology Inc. DS39931D-page 421

PIC18F46J50 FAMILY

R/WO-1 R/WO-1 U-0 R/WO-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1

IESO FCMEN

— LPT1OSC T1DIG FOSC2 FOSC1 FOSC0

bit 7 bit 0

Legend:

R = Readable bit WO = Write-Once 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 IESO: Two-Speed Start-up (Internal/External Oscillator Switchover) Control bit

1 = Two-Speed Start-up is enabled

0 = Two-Speed Start-up is disabled

bit 6 FCMEN: Fail-Safe Clock Monitor Enable bit

1 = Fail-Safe Clock Monitor is enabled

0 = Fail-Safe Clock Monitor is disabled

bit 5 Unimplemented: Read as ‘0’

bit 4 LPT1OSC: Low-Power Timer1 Oscillator Enable bit

1 = Timer1 oscillator is configured for high-power operation

0 = Timer1 oscillator is configured for low-power operation

bit 3 T1DIG: Secondary Clock Source T1OSCEN Enforcement bit

1 = Secondary oscillator clock source may be selected (OSCCON<1:0> = 01) regardless of the

(T1CON<3>) T1OSCEN state

0 = Secondary oscillator clock source may not be selected unless T1CON<3> = 1

bit 2-0 FOSC<2:0>: Oscillator Selection bits

111 = ECPLL oscillator with PLL software controlled, CLKO on RA6

110 = EC oscillator with CLKO on RA6

101 = HSPLL oscillator with PLL software controlled

100 = HS oscillator

011 = INTOSCPLLO, internal oscillator with PLL software controlled, CLKO on RA6, port function on

RA7

010 = INTOSCPLL, internal oscillator with PLL software controlled, port function on RA6 and RA7

001 = INTOSCO internal oscillator block (INTRC/INTOSC) with CLKO on RA6, port function on RA7

000 = INTOSC internal oscillator block (INTRC/INTOSC), port function on RA6 and RA7