Microchip Technology MA330024 Data Sheet

 2009-2014 Microchip Technology Inc.

DS70000591F-page 189

The oscillator system provides:

• External and Internal Oscillator Options as Clock 

Sources

• An On-Chip Phase-Locked Loop (PLL) to Scale 

the Internal Operating frequency to the Required 
System Clock Frequency

• An Internal FRC Oscillator that can also be used 

with the PLL, thereby allowing Full-Speed Operation 
without any External Clock Generation Hardware

• Clock Switching Between Various Clock Sources

• Programmable Clock Postscaler for System 

Power Savings

• A Fail-Safe Clock Monitor (FSCM) that Detects 

Clock Failure and takes Fail-Safe Measures

• A Clock Control Register (OSCCON)

• Nonvolatile Configuration bits for Main Oscillator 

Selection

• Auxiliary PLL for ADC and PWM

A simplified diagram of the oscillator system is shown
in 

.

Note 1: This data sheet summarizes the features

of the dsPIC33FJ32GS406/606/608/610
and dsPIC33FJ64GS406/606/608/610
families of devices. It is not intended to
be a comprehensive reference source.
To complement the information in this
data sheet, refer to “Oscillator (Part IV)”
(DS70307) in the “dsPIC33/PIC24
Family Reference Manual”, which is
available from the Microchip web site
(

www.microchip.com

). The information

in this data sheet supersedes the
information in the FRM.

2: Some registers and associated bits

described in this section may not be
available on all devices. Refer to

 in

this data sheet for device-specific register
and bit information.