DSPIC33FJ06GS101TESLASHML datasheet(137/346 Pages) MICROCHIP

137 / 346 page

Preliminary

DS70318D-page 135

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04

8.0

OSCILLATOR

CONFIGURATION

The dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/

X04 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 Figure 8-1.

FIGURE 8-1:

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04 OSCILLATOR SYSTEM

DIAGRAM

Note:

This data sheet summarizes the features

the

dsPIC33FJ06GS101/X02

and

dsPIC33FJ16GSX02/X04

families

devices. It is not intended to be a compre-

hensive reference source. To complement

the information in this data sheet, refer to

the “dsPIC33F Family Reference Manual”,

Section

42.

“Oscillator

(Part

IV)”

(DS70307), which is available from the

Microchip web site (www.microchip.com).

XTPLL, HSPLL,

XT, HS, EC

FRCDIV<2:0>

WDT, PWRT,

FSCM

FRCDIVN

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

÷N

ACLK

SELACLK

APSTSCLR<2:0>

To PWM/ADC

ENAPLL

POSCMD<1:0>

FVCO(1)

APLL

x16

ASRCSEL

FRCSEL

POSCCLK

FRCCLK

POSCCLK

÷N

ROSEL

RODIV<3:0>

REFCLKO

POSCCLK

Reference Clock Generation

Auxiliary Clock Generation

RPx

Note

See Section 8.1.3 “PLL Configuration” and Section 8.2 “Auxiliary Clock Generation” for FVCO values.

If the Oscillator is used with XT or HS modes, an external parallel resistor with the value of 1 M

Ω must be connected.

FVCO(1)

FOSC

OSC2

OSC1

Primary Oscillator

R(2)

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