PIC24FJ128GA106 configuration bits

The configuration words set the oscillator and PLL, the watchdog, the debugger pins, brown-out reset and code protection: they are the last words of flash (from 0x0157F8), programmed with the code. Pick a setting and the word below updates; the starting values are the defaults in Microchip's device file, and an erased bit reads 1. In XC16 each setting is a #pragma config FNOSC = FRC line.