What is the address from where the PIC begins execution ?

arunb · Joined: 08 Sep 2003 Posts: 492 Location: India

Hi,

I read that the PIC mcu begins execution from 0 address of the Program Memory, is this correct ??

Is it possible to change this starting address to something using C commands ?? Also how would interrupt service routines be addressed, do ISR's have seperate pre-defined addresses of their own ??

thanks
arunb

kypec · Joined: 20 Sep 2003 Posts: 54

Yes, that is correct -> PIC always begins its program execution from address 0x0000 and ISR vectors are generally fixed at 0x0004 (PIC16) or 0x0008 (PIC18).
However, you can relocate your main() and ISR routines with use of the compiler directive