The vector table contains the reset value of the stack pointer, and the start addresses, also called exception vectors, for all exception handlers. Figure 2.2 shows the order of the exception vectors in the vector table. The least-significant bit of each vector must be 1, indicating that the exception handler is Thumb code, see Thumb state.
On system reset, the vector table is fixed at address
Privileged software can write to the VTOR to relocate the vector
table start address to a different memory location, in the range
see Vector Table Offset