PIC16F527 configuration bits The configuration words set the oscillator, the watchdog, the power-up timer, brown-out reset, low-voltage programming and code protection. Pick a setting and the word below updates; the starting values are the defaults in Microchip's device file. In XC8 each setting is a #pragma config NAME = SETTING line.
CONFIG · 0x0FFF 0x03FF default 0x03FF DRTEN Device Reset Timer Enable DRT Disabled DRT Enabled (18 ms) BOREN Brown-out Reset Enable BOR Disabled BOR Enabled CPSW Code Protection - Self Writable Memory Code protection on Code protection off IOSCFS Internal Oscillator Frequency Select 4 MHz INTOSC Speed 8 MHz INTOSC Speed MCLRE Master Clear Enable MCLR pin functions as I/O, MCLR internally tied to Vdd MCLR pin functions as MCLR CP Code Protection - User Program Memory Code protection on Code protection off WDTE Watchdog Timer Enable WDT Disabled WDT Enabled FOSC Oscillator Selection LP oscillator and automatic 18 ms DRT (DRTEN ignored) XT oscillator and automatic 18 ms DRT (DRTEN ignored) HS oscillator and automatic 18 ms DRT (DRTEN ignored) EC oscillator with I/O function on OSC2/CLKOUT and 10 us startup time INTRC with I/O function on OSC2/CLKOUT and 10 us startup time INTRC with CLKOUT function on OSC2/CLKOUT and 10 us startup time EXTRC with I/O function on OSC2/CLKOUT and 10 us startup time EXTRC with CLKOUT function on OSC2/CLKOUT and 10 us startup time 
BETA