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© 2013 Microchip Technology Inc.DS70005131A-page 1

Oscillator Module

HIGHLIGHTS

This section of the manual contains the following major topics:

1.0Introduction ....................................................................................................................... 2

2.0CPU Clocking....................................................................................................................5

3.0Oscillator Configuration Registers....................................................................................6

4.0Special Function Registers ...............................................................................................9

5.0Primary Oscillator (POSC)..............................................................................................21

6.0Internal Fast RC (FRC) Oscillator...................................................................................25

7.0Phase-Locked Loop (PLL)..............................................................................................26

8.0Secondary Oscillator (SOSC).........................................................................................31

9.0Low-Power RC (LPRC) Oscillator...................................................................................32

10.0Auxiliary Oscillator..........................................................................................................33

11.0Auxiliary Phase-Locked Loop (APLL).............................................................................34

12.0Auxiliary PLL (x16)..........................................................................................................37

13.0Fail-Safe Clock Monitor (FSCM).....................................................................................39

14.0Clock Switching...............................................................................................................40

15.0Two-Speed Start-up........................................................................................................44

16.0Reference Clock Output..................................................................................................44

17.0Linear Feedback Shift Register.......................................................................................44

18.0Register Maps.................................................................................................................45

19.0Related Application Notes...............................................................................................46

20.0Revision History..............................................................................................................47

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