PIC16F1938_13 Datasheet, PDF (67/488 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver

PIC16(L)F1938/9
FIGURE 5-7:
INTERNAL OSCILLATOR SWITCH TIMING
HFINTOSC/ LFINTOSC (FSCM and WDT disabled)
MFINTOSC
HFINTOSC/
MFINTOSC
Start-up Time
2-cycle Sync
LFINTOSC
IRCF <3:0>
0
0
System Clock
Running
HFINTOSC/ LFINTOSC (Either FSCM or WDT enabled)
MFINTOSC
HFINTOSC/
MFINTOSC
2-cycle Sync
LFINTOSC
IRCF <3:0>
0
0
System Clock
Running
LFINTOSC HFINTOSC/MFINTOSC
LFINTOSC
HFINTOSC/
MFINTOSC
IRCF <3:0>
Start-up Time 2-cycle Sync
=0
0
System Clock
LFINTOSC turns off unless WDT or FSCM is enabled
Running
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DS40001574C-page 67