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Is the IDAU also run-time programmable?

Ed Player

This question was raised in the 'How to implement a secure IoT system on ARMv8-M' webinar, view all the questions in the round up blog post. 

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    The IDAU is an Implementation Defined Attribution Unit, so it is implementation defined whether it is programmable. The IDAU in SDK-200 is fixed and cannot be reprogrammed. It has been evenly split into 16 separate regions so that it can simply use bit 28 of the address to establish whether an access is secure or non-secure.
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  • +1
    The IDAU is an Implementation Defined Attribution Unit, so it is implementation defined whether it is programmable. The IDAU in SDK-200 is fixed and cannot be reprogrammed. It has been evenly split into 16 separate regions so that it can simply use bit 28 of the address to establish whether an access is secure or non-secure.
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