TRISA = 0x3F; // input
    ANSELA = 0x0; // digital I/O
    LATA = 0x0;
    WPUA = 0x04; // Pullup WPUA2
    OPTION_REGbits.nWPUEN = 0; //Weak pull-ups are enabled by individual WPUx latch values
    //IOCx registers
    IOCAP = 0x0;
    IOCAN = 0x0;
    IOCAF = 0x0;

//    OSCCONbits.SCS = 0b00;      // SCS FOSC
//    OSCCONbits.SCS = 0b01;      // SCS Timer1
    OSCCONbits.SCS = 0b10;      // SCS Internal
    OSCCONbits.IRCF = 0b0000;   // IRCF 31KHz_LF
    OSCCONbits.SPLLEN = 0;      // 4x PLL is disabled
    // Oscillator module is running at the factory-calibrated frequency
    OSCTUNE = 0x0;
    // SBOREN disabled;
    BORCON = 0x0;

#include <xc.h>

#pragma config FOSC = INTOSC
#pragma config WDTE = OFF
#pragma config PWRTE = OFF
#pragma config MCLRE = OFF
#pragma config BOREN = OFF
#pragma config CP = OFF, CPD = OFF
#pragma config PLLEN = OFF
#pragma config LVP = OFF

void main(void) {
  OSCCONbits.SCS = 0b10;
  OSCCONbits.IRCF = 0b0000;
  OSCCONbits.SPLLEN = 0;
  OSCTUNE = 0x00;

  ADCON0 = 0x00;
  ANSELA = 0x00;
  CM1CON0 = 0x00;
  FVRCON = 0x00;
  DACCON0 = 0x00;
  T1CON = 0x00;
  WDTCONbits.SWDTEN = 0;

  TRISA = 0x00;
  LATA = 0x00;
  WPUA = 0x00;
  OPTION_REGbits.nWPUEN = 1;

  INTCON = 0x00;

  SLEEP();

  while (1) {
  }
}