PIC18F1XK22 Datasheet, PDF (26/388 Pages) Microchip Technology – 20-Pin Flash Microcontrollers with nanoWatt XLP Technology

PIC18F1XK22/LF1XK22
FIGURE 2-7:
FSCM TIMING DIAGRAM
Sample Clock
System
Clock
Output
Clock Monitor Output
(Q)
OSCFIF
Oscillator
Failure
Failure
Detected
Note:
Test
Test
Test
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.
TABLE 2-5: SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset
Values on
page
CONFIG1H
IESO
FCMEN
PCLKEN PLL_EN FOSC3 FOSC2 FOSC1 FOSC0
263
INTCON
GIE/GIEH PEIE/GIEL TMR0IE
INT0IE
RABIE TMR0IF INT0IF RABIF
257
OSCCON
IDLEN
IRCF2
IRCF1
IRCF0
OSTS HFIOFS SCS1
SCS0
258
OSCCON2
—
—
—
—
—
PRI_SD HFIOFL LFIOFS
258
OSCTUNE INTSRC PLLEN
TUN5
TUN4
TUN3
TUN2
TUN1
TUN0
260
IPR2
OSCFIP
C1IP
C2IP
EEIP
BCLIP
—
TMR3IP
—
260
PIE2
OSCFIE
C1IE
C2IE
EEIE
BCLIE
—
TMR3IE
—
260
PIR2
OSCFIF
C1IF
C2IF
EEIF
BCLIF
—
TMR3IF
—
260
T1CON
RD16
T1RUN T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON
258
Legend: x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by oscillators.
Note 1: Other (non Power-up) Resets include MCLR Reset and Watchdog Timer Reset during normal operation.
DS41365D-page 26
Preliminary
 2010 Microchip Technology Inc.