pic24fj128ga010 family - Microchip

PIC24FJ128GA010 FAMILY7.0 OSCILLATORCONFIGURATIONNote:This data sheet summarizes the featuresof this group of PIC24F devices. It is notintended to be a comprehensive referencesource. Refer to Section 6. “Oscillator”(DS39700) in the “PIC24F FamilyReference Manual” for more information.The oscillator system for PIC24FJ128GA010 familydevices has the following features:• A total of four external and internal oscillator optionsas clock sources, providing 11 different clock modes• On-chip 4x PLL to boost internal operating frequencyon select internal and external oscillator sources• Software-controllable switching between variousclock sources• Software-controllable postscaler for selectiveclocking of CPU for system power savings• A Fail-Safe Clock Monitor (FSCM) that detectsclock failure and permits safe application recoveryor shutdownA simplified diagram of the oscillator system is shownin Figure 7-1.FIGURE 7-1:PIC24FJ128GA010 FAMILY CLOCK DIAGRAMPrimary OscillatorPIC24FJ128GA010 FamilyCLKOOSC1XT, HS, ECCLKDIVOSC28 MHz/4 MHz4 x PLLXTPLL, HSPLL,ECPLL, FRCPLLPostscalerCPUFRCOscillator8 MHz(Nominal)PostscalerFRCDIVPeripheralsCLKDIVFRCLPRCOscillator31 kHz (Nominal)LPRCSOSCOSOSCISecondary OscillatorSOSCENEnableOscillatorSOSCClock Control LogicFail-SafeClockMonitorWDT, PWRTClock Source Optionfor Other Modules© 2009 Microchip Technology Inc. DS39747E-page 93