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How to Change the Non Secure VTOR (Cortex-M33)

Afonso Santos

Hi,

I'm using the Cortex-M33 and I would like to know if it's possible to change the Non Secure Vector table offset address (VTOR) while maintaining the Secure VTOR pointing to a different address.

The VTOR_S is located at 0xE000ED08 and the VTOR_NS at 0xE002ED08.

If I change the address of the VTOR_S, the address of VTOR_NS also changes to the same as the secure. On the other hand, if I change the VTOR_NS (located at 0xE002ED08) nothing happens, not even the VTOR_NS itself...is there any protection bit that it's missing to me?

Thanks.

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