There are multiple ways to reset this device:
      
         - Power-on Reset (POR)
 
         - Brown-out Reset (BOR)
 
         - Low-Power Brown-Out Reset (LPBOR)
 
         - MCLR Reset
 
         - WDT Reset
 
         RESET instruction 
         - Stack Overflow
 
         - Stack Underflow
 
         - Programming mode exit
 
      
      To allow VDD to stabilize, an optional Power-up Timer can
         be enabled to extend the Reset time after a BOR or POR event.
      A simplified block diagram of the On-Chip Reset Circuit is shown in
         the block diagram below.
      Figure 1. Simplified Block Diagram of On-Chip
            Reset Circuit
         
         
         Note: See “BOR Operating Conditions”
            table for BOR active conditions.