Microchip Technology MA330020 Data Sheet

DS70000318G-page 268

 2008-2014 Microchip Technology Inc.

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

 = Reserved

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

IOL1WAY

FOSC

Immediate

Peripheral Pin Select Configuration bit

1

 = Allows only one reconfiguration

0

 = Allows multiple reconfigurations

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