Datasheet

 2010-2012 Microchip Technology Inc. DS41412E-page 45
PIC18(L)F2X/4XK22
FIGURE 2-11: FSCM TIMING DIAGRAM
OSCFIF
System
Clock
Output
Sample Clock
Failure
Detected
Oscillator
Failure
Note: The system clock is normally at a much higher frequency than the sample clock. The relative frequencies in
this example have been chosen for clarity.
(Q)
Tes t
Test Test
Clock Monitor Output
TABLE 2-4: REGISTERS ASSOCIATED WITH CLOCK SOURCES
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Register
on Page
INTCON GIE/GIEH PEIE/GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 116
IPR2 OSCFIP C1IP C2IP EEIP BCL1IP HLVDIP TMR3IP CCP2IP 129
OSCCON IDLEN IRCF<2:0> OSTS HFIOFS SCS<1:0> 32
OSCCON2 PLLRDY SOSCRUN
—
MFIOSEL SOSCGO PRISD MFIOFS LFIOFS 33
OSCTUNE INTSRC PLLEN TUN<5:0> 37
PIE2 OSCFIE C1IE C2IE EEIE BCL1IE HLVDIE TMR3IE CCP2IE 125
PIR2 OSCFIF
C1IF C2IF EEIF BCL1IF HLVDIF TMR3IF CCP2IF 120
Legend: — = unimplemented locations, read as ‘0’. Shaded bits are not used by clock sources.
TABLE 2-5: CONFIGURATION REGISTERS ASSOCIATED WITH CLOCK SOURCES
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Register
on Page
CONFIG1H IESO FCMEN PRICLKEN PLLCFG FOSC<3:0> 357
CONFIG2L
— — —
BORV<1:0> BOREN<1:0> PWRTEN
358
CONFIG3H
MCLRE
—
P2BMX T3CMX HFOFST CCP3MX PBADEN CCP2MX
360
Legend: — = unimplemented locations, read as ‘0’. Shaded bits are not used for clock sources.