PIC16F688
FIGURE 3-6:
INTERNAL OSCILLATOR SWITCH TIMING
HF
LF(1)
HFINTOSC
LFINTOSC (FSCM and WDT disabled)
HFINTOSC
Start-up Time
2-cycle Sync
Running
LFINTOSC
≠ 0
= 0
IRCF <2:0>
System Clock
Note 1: When going from LF to HF.
HFINTOSC
HFINTOSC
LFINTOSC (Either FSCM or WDT enabled)
2-cycle Sync
Running
LFINTOSC
≠ 0
= 0
IRCF <2:0>
System Clock
LFINTOSC
HFINTOSC
LFINTOSC turns off unless WDT or FSCM is enabled
Running
LFINTOSC
Start-up Time 2-cycle Sync
HFINTOSC
= 0
≠ 0
IRCF <2:0>
System Clock
DS41203D-page 28
© 2007 Microchip Technology Inc.