Datasheet

dsPIC33FJ12MC201/202
DS70265E-page 206 © 2007-2011 Microchip Technology Inc.
TABLE 21-2: dsPIC33F CONFIGURATION BITS DESCRIPTION
Bit Field Register
RTSP
Effect
Description
BWRP FBS Immediate Boot Segment Program Flash Write Protection
1 = Boot segment can be written
0 = Boot segment is write-protected
BSS<2:0> FBS Immediate Boot Segment Program Flash Code Protection Size
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 bit
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
IOL1WAY FOSC Immediate Peripheral pin select configuration
1 = Allow only one reconfiguration
0 = Allow multiple reconfigurations
OSCIOFNC FOSC Immediate OSC2 Pin Function bit (except in XT and HS modes)
1 = OSC2 is clock output
0 = OSC2 is general purpose digital I/O pin
POSCMD<1:0> FOSC Immediate Primary Oscillator Mode Select bits
11 = Primary oscillator disabled
10 = HS Crystal Oscillator mode
01 = XT Crystal Oscillator mode
00 = EC (External Clock) mode