PIC24HJ128GP310 datasheet(121/286 Pages) MICROCHIP

121 / 286 page

DS70175F-page 119

PIC24HJXXXGPX06/X08/X10

8.0

OSCILLATOR

CONFIGURATION

The PIC24HJXXXGPX06/X08/X10 oscillator system

provides:

• Various external and internal oscillator options as

clock sources

• An on-chip PLL to scale the internal operating

frequency to the required system clock frequency

• The internal FRC oscillator 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.

A simplified diagram of the oscillator system is shown

in Figure 8-1.

FIGURE 8-1:

PIC24HJXXXGPX06/X08/X10 OSCILLATOR SYSTEM DIAGRAM

Note:

This data sheet summarizes the features

of this group of PIC24HJXXXGPX06/X08/

X10 devices. It is not intended to be a

comprehensive reference source. To com-

plement the information in this data sheet,

refer to the “PIC24H Family Reference

Manual”. Refer to the Microchip web site

(www.microchip.com)

for

the

latest

PIC24H

Family

Reference

Manual

sections.

PIC24H

Secondary Oscillator

LPOSCEN

SOSCO

SOSCI

Timer 1

OSC1

OSC2

Primary Oscillator

XTPLL, HSPLL,

XT, HS, EC

FRCDIV<2:0>

WDT, PWRT,

FSCM

FRCDIVN

SOSC

FRCDIV16

ECPLL, FRCPLL

NOSC<2:0> FNOSC<2:0>

Reset

FRC

Oscillator

LPRC

Oscillator

DOZE<2:0>

S1/S3

FRC

LPRC

÷16

Clock Switch

Clock Fail

÷ 2

TUN<5:0>

PLL(1)

FCY

FOSC

Note 1: See Figure 8-2 for PLL details

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