Exception Priorities; Vector Table - Texas Instruments Concerto F28M35 Series Technical Reference Manual

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On system reset, the vector table is fixed at address 0x0000.0000. Privileged software can write to the

Vector Table Offset (VTABLE) register to relocate the vector table start address to a different memory

location, in the range 0x0000.0200 to 0x3FFF.FE00. Note that when configuring the VTABLE register, the

offset must be aligned on a 512-byte boundary.

24.7.5 Exception Priorities

shows, all exceptions have an associated priority, with a lower priority value indicating a

higher priority and configurable priorities for all exceptions except Reset, Hard fault, and NMI. If software

does not configure any priorities, then all exceptions with a configurable priority have a priority of 0. For

information about configuring exception priorities, see the Cortex-M3 Peripherals chapter.

NOTE: Configurable priority values for the Concerto implementation are in the range 0-7. This

means that the Reset, Hard fault, and NMI exceptions, with fixed negative priority values,

always have higher priority than any other exception.

For example, assigning a higher priority value to IRQ[0] and a lower priority value to IRQ[1] means that

IRQ[1] has higher priority than IRQ[0]. If both IRQ[1] and IRQ[0] are asserted, IRQ[1] is processed before

If multiple pending exceptions have the same priority, the pending exception with the lowest exception

number takes precedence. For example, if both IRQ[0] and IRQ[1] are pending and have the same

priority, then IRQ[0] is processed before IRQ[1].

SPRUH22I – April 2012 – Revised November 2019

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Figure 24-14. Vector table

Exception number

Reserved for Debug

Memory management fault

Initial SP value

Exception Model

Cortex-M3 Processor

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