Microchip Technology MA330026 Data Sheet
2011-2014 Microchip Technology Inc.
DS70000652F-page 263
dsPIC33FJ16(GP/MC)101/102 AND dsPIC33FJ32(GP/MC)101/102/104
TABLE 23-4:
dsPIC33F CONFIGURATION BITS DESCRIPTION
Bit Field
Description
GCP
General Segment Code-Protect bit
1
= User program memory is not code-protected
0
= Code protection is enabled for the entire program memory space
GWRP
General Segment Write-Protect bit
1
= User program memory is not write-protected
0
= User program memory is write-protected
IESO
Two-Speed Oscillator Start-up Enable bit
1
= Starts up device with FRC, then automatically switches to the user-selected oscillator source
when ready
0
= Starts up device with user-selected oscillator source
PWMLOCK
PWM Lock Enable bit
1
= Certain PWM registers may only be written after a key sequence
0
= PWM registers may be written without a key sequence
WDTWIN<1:0>
Watchdog Timer Window Select bits
11
= WDT window is 24% of WDT period
10
= WDT window is 37.5% of WDT period
01
= WDT window is 50% of WDT period
00
= WDT window is 75% of WDT period
FNOSC<2:0>
Oscillator Selection bits
111
= Fast RC Oscillator with Divide-by-N (FRCDIVN)
110
= Reserved; do not use
101
= Low-Power RC Oscillator (LPRC)
100
= Secondary Oscillator (SOSC)
011
= Primary Oscillator with PLL module (MS + PLL, EC + PLL)
010
= Primary Oscillator (MS, HS, EC)
001
= Fast RC Oscillator with Divide-by-N and PLL module (FRCDIVN + PLL)
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
= Allow only one reconfiguration
0
= Allow multiple reconfigurations
OSCIOFNC
OSC2 Pin Function bit (except in MS and HS modes)
1
= OSC2 is a 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 (10 MHz-32 MHz)
01
= MS Crystal Oscillator mode (3 MHz-10 MHz)
00
= EC (External Clock) mode (DC-32 MHz)
FWDTEN
Watchdog Timer Enable bit
1
= Watchdog Timer is always enabled (LPRC oscillator cannot be disabled; clearing the SWDTEN
bit in the RCON register will have no effect)
0
= Watchdog Timer is enabled/disabled by user software (LPRC can be disabled by clearing the
SWDTEN bit in the RCON register)
WINDIS
Watchdog Timer Window Enable bit
1
= Watchdog Timer in Non-Window mode
0
= Watchdog Timer in Window mode