DSPIC33EP128GS708 datasheet(354/484 Pages) MICROCHIP

354 / 484 page

dsPIC33EPXXXGS70X/80X FAMILY

DS70005258C-page 354

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FNOSC<2:0>

Oscillator Selection bits

111 = Fast RC Oscillator with Divide-by-N (FRCDIVN)

110 = Fast RC Oscillator with Divide-by-16

101 = Low-Power RC Oscillator (LPRC)

100 = Reserved; do not use

011 = Primary Oscillator with PLL module (XT+PLL, HS+PLL, EC+PLL)

010 = Primary Oscillator (XT, HS, EC)

001 = Fast RC Oscillator with Divide-by-N with PLL module (FRCPLL)

000 = Fast RC Oscillator (FRC)

FCKSM<1:0>

Clock Switching Mode bits

1x = Clock switching is disabled, Fail-Safe Clock Monitor is disabled

01 = Clock switching is enabled, Fail-Safe Clock Monitor is disabled

00 = Clock switching is enabled, Fail-Safe Clock Monitor is enabled

IOL1WAY

Peripheral Pin Select Configuration bit

1 = Allows only one reconfiguration

0 = Allows multiple reconfigurations

OSCIOFNC

OSC2 Pin Function bit (except in XT and HS modes)

1 = OSC2 is the clock output

0 = OSC2 is a general purpose digital I/O pin

POSCMD<1:0>

Primary Oscillator Mode Select bits

11 = Primary Oscillator is disabled

10 = HS Crystal Oscillator mode

01 = XT Crystal Oscillator mode

00 = EC (External Clock) mode

WDTEN<1:0>

Watchdog Timer Enable bits

11 = Watchdog Timer is always enabled (LPRC oscillator cannot be disabled; clearing the

SWDTEN bit in the RCON register will have no effect)

10 = Watchdog Timer is enabled/disabled by user software (LPRC can be disabled by

clearing the SWDTEN bit in the RCON register)

01 = Watchdog Timer is enabled only while device is active and is disabled while in Sleep

mode; software control is disabled in this mode

00 = Watchdog Timer and SWDTEN bit are disabled

WINDIS

Watchdog Timer Window Enable bit

1 = Watchdog Timer is in Non-Window mode

0 = Watchdog Timer is in Window mode

PLLKEN

PLL Lock Enable bit

1 = PLL lock is enabled

0 = PLL lock is disabled

WDTPRE

Watchdog Timer Prescaler bit

1 = 1:128

0 = 1:32

WDTPOST<3:0>

Watchdog Timer Postscaler bits

1111 = 1:32,768

1110 = 1:16,384

•

0001 = 1:2

0000 = 1:1

TABLE 27-2:

CONFIGURATION BITS DESCRIPTION (CONTINUED)

Bit Field

Description

Note 1:

The Boot Segment must be present to use the Alternate Interrupt Vector Table.

DSPIC33EP128GS708 Datasheet(PDF) 354 Page - Microchip Technology

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