11.3 Interrupt Vector Table
The interrupt controller supports an IVT that contains the vector address location for each interrupt request source.
The IVT resides in program memory, starting at the address location determined by IVTBASE. The IVT contains one vector for each source of interrupt. Each interrupt vector location contains the starting address of the associated Interrupt Service Routine (ISR). The MVECEN Configuration bit controls the availability of the vector table.