DSPIC33FJ64GS406 datasheet(346/456 Pages) MICROCHIP

346 / 456 page

dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610

DS70591E-page 346

 2009-2012 Microchip Technology Inc.

TABLE 24-2:

dsPIC33F CONFIGURATION BITS DESCRIPTION

Bit Field

RTSP Effect

Description

BWRP

FBS

Immediate

Boot Segment Program Flash Write Protection bit

1 = Boot segment can be written

0 = Boot segment is write-protected

BSS<2:0>

FBS

Immediate

Boot Segment Program Flash Code Protection Size bits

X11 = No boot program Flash segment

Boot space is 256 instruction words (except interrupt vectors)

110 = Standard security; boot program Flash segment ends at

0x0003FE

010 = High security; boot program Flash segment ends at

0x0003FE

Boot space is 768 instruction words (except interrupt vectors)

101 = Standard security; boot program Flash segment ends at

0x0007FE

001 = High security; boot program Flash segment ends at

0x0007FE

Boot space is 1792 instruction words (except interrupt vectors)

100 = Standard security; boot program Flash segment ends at

0x000FFE

000 = High security; boot program Flash segment ends at

0x000FFE

GSS<1:0>

FGS

Immediate

General Segment Code-Protect bits

11 = User program memory is not code-protected

10 = Standard security

0x = High security

GWRP

FGS

Immediate

General Segment Write-Protect bit

1 = User program memory is not write-protected

0 = User program memory is write-protected

IESO

FOSCSEL

Immediate

Two-Speed Oscillator Start-up Enable bit

1 = Start-up device with FRC, then automatically switch to the user

selected oscillator source when ready

0 = Start-up device with user selected oscillator source

FNOSC<2:0>

FOSCSEL

If clock switch

is enabled,

RTSP effect

is on any

device Reset;

otherwise,

immediate

Initial Oscillator Source Selection bits

111 = Internal Fast RC (FRC) Oscillator with Postscaler

110 = Internal Fast RC (FRC) Oscillator with Divide-by-16

101 = LPRC Oscillator

100 = Secondary (LP) Oscillator

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

010 = Primary (XT, HS, EC) Oscillator

001 = Internal Fast RC (FRC) Oscillator with PLL

000 = FRC Oscillator

FCKSM<1:0>

FOSC

Immediate

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

OSCIOFNC

FOSC

Immediate

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

1 = OSC2 is the clock output

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

POSCMD<1:0>

FOSC

Immediate

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

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