DSPIC33FJ16GS204-I/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

DSPIC33FJ16GS204-I/SP

High-Performance, 16-bit Digital Signal Controllers

Microchip Technology 

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04

8.0 OSCILLATOR

CONFIGURATION

Note:

This data sheet summarizes the features

of the dsPIC33FJ06GS101/X02 and

dsPIC33FJ16GSX02/X04 families of

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).

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

DOZE<2:0>

Primary Oscillator

OSC1

POSCCLK

XT, HS, EC

S2

R(2)

S3

XTPLL, HSPLL,

FCY

ECPLL, FRCPLL

OSC2

S1

PLL(1)

FVCO(1)

S1/S3

POSCMD<1:0>

FP

FRC

Oscillator

FRCCLK

÷2

FRCDIVN S7

FOSC

TUN<5:0>

÷ 16

FRCDIV<2:0>

LPRC

Oscillator

Reference Clock Generation

POSCCLK

FOSC

REFCLKO

÷N

RPx

ROSEL

Auxiliary Clock Generation

FRCCLK

POSCCLK

RODIV<3:0>

APLL

x16

FRCDIV16 S6

FRC S0

LPRC

S5

Clock Fail Clock Switch Reset

S7

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

WDT, PWRT,

FSCM

FVCO(1)

ACLK To PWM/ADC

÷N

ASRCSEL

FRCSEL

ENAPLL

SELACLK APSTSCLR<2:0>

Note 1: See Section 8.1.3 “PLL Configuration” and Section 8.2 “Auxiliary Clock Generation” for FVCO values.

2: If the Oscillator is used with XT or HS modes, an external parallel resistor with the value of 1 MΩ must be connected.

© 2009 Microchip Technology Inc.

Preliminary

DS70318D-page 135

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