Microchip Technology dsPIC30F

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Oscillator

Section 7. Oscillator

HIGHLIGHTS

This section of the manual contains the following topics:

7.1 Introduction .................................................................................................................... 7-2

7.2 CPU Clocking Scheme .................................................................................................. 7-4

7.3 Oscillator Configuration.................................................................................................. 7-5

7.4 Oscillator Control Register (OSCCON).......................................................................... 7-6

7.5 Primary Oscillator...........................................................................................................7-9

7.6 Crystal Oscillators/Ceramic Resonators ...................................................................... 7-10

7.7 Determining Best Values for Crystals, Clock Mode, C1, C2 and Rs ............................ 7-12

7.8 External Clock Input..................................................................................................... 7-13

7.9 External RC Oscillator.................................................................................................. 7-14

7.10 Phase Locked Loop (PLL) ........................................................................................... 7-18

7.11 Low Power 32 kHz Crystal Oscillator........................................................................... 7-19

7.12 Oscillator Start-up Timer (OST).................................................................................... 7-19

7.13 Internal Fast RC Oscillator (FRC) ................................................................................ 7-19

7.14 Internal Low Power RC (LPRC) Oscillator ................................................................... 7-20

7.15 Fail-Safe Clock Monitor (FSCM) .................................................................................. 7-20

7.16 Programmable Oscillator Postscaler............................................................................ 7-21

7.17 Clock Switching Operation........................................................................................... 7-22

7.18 Design Tips .................................................................................................................. 7-26

7.19 Related Application Notes............................................................................................ 7-27

7.20 Revision History ........................................................................................................... 7-28

Microchip Technology dsPIC30F - Page 165