Microchip Technology IC PIC MCU PIC16F1937-I/PT TQFP-44 MCP PIC16F1937-I/PT Data Sheet
Product codes
PIC16F1937-I/PT
2008-2011 Microchip Technology Inc.
DS41364E-page 75
PIC16(L)F1934/6/7
FIGURE 5-7:
INTERNAL OSCILLATOR SWITCH TIMING
HFINTOSC/
LFINTOSC
IRCF <3:0>
System Clock
HFINTOSC/
LFINTOSC
IRCF <3:0>
System Clock
0
0
0
0
Start-up Time
2-cycle Sync
Running
2-cycle Sync
Running
HFINTOSC/
LFINTOSC (FSCM and WDT disabled)
HFINTOSC/
LFINTOSC (Either FSCM or WDT enabled)
LFINTOSC
HFINTOSC/
IRCF <3:0>
System Clock
=
0
0
Start-up Time
2-cycle Sync
Running
LFINTOSC
HFINTOSC/MFINTOSC
LFINTOSC turns off unless WDT or FSCM is enabled
MFINTOSC
MFINTOSC
MFINTOSC
MFINTOSC
MFINTOSC