Microchip Technology MA330012 Ficha De Dados
dsPIC33F
DS70165E-page 292
Preliminary
©
2007 Microchip Technology Inc.
GWRP
FGS
General Segment Write-Protect bit
1
= User program memory is not write-protected
0
= User program memory is write-protected
IESO
FOSCSEL
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
TEMP
FOSCSEL
Temperature Protection Enable bit
1
= Temperature protection disabled
0
= Temperature protection enabled
FNOSC<2:0>
FOSCSEL
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
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
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
Primary Oscillator Mode Select bits
11
= Primary oscillator disabled
10
= HS Crystal Oscillator mode
01
= XT Crystal Oscillator mode
00
= EC (External Clock) mode
FWDTEN
FWDT
Watchdog Timer Enable bit
1
= Watchdog Timer always enabled (LPRC oscillator cannot be
disabled. Clearing the SWDTEN bit in the RCON register will have no
effect.)
effect.)
0
= Watchdog Timer enabled/disabled by user software (LPRC can be
disabled by clearing the SWDTEN bit in the RCON register)
WINDIS
FWDT
Watchdog Timer Window Enable bit
1
= Watchdog Timer in Non-Window mode
0
= Watchdog Timer in Window mode
WDTPRE
FWDT
Watchdog Timer Prescaler bit
1
= 1:128
0
= 1:32
WDTPOST
FWDT
Watchdog Timer Postscaler bits
1111
= 1:32,768
1110
= 1:16,384
.
.
.
.
.
0001
= 1:2
0000
= 1:1
TABLE 23-2:
dsPIC33F CONFIGURATION BITS DESCRIPTION (CONTINUED)
Bit Field
Register
Description