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How to assert PSLVERR in APB4 ?

PhanTam

Hi All,

I have a question about  APB4  slave

i think  PSLVERR will  be asserted when address is incorrect.

Is my understanding correct?

Regards,

PhanTam

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  • +1

    PSLVERR can be asserted by the selected peripheral for any reason you want.

    That could be the PADDR value addressing a non-existent address as you suggest, or it could be a write access to a read-only register, or a non-secure access to a secure register (or any other protection violation), or it could be more peripheral function specific reasons you might need to signal an error (maybe trying to configure a peripheral into an unsupported mode).

    Basically there is no defined reason when you CAN signal an error, it is there for you as the peripheral designer to use as required.

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  • +1

    PSLVERR can be asserted by the selected peripheral for any reason you want.

    That could be the PADDR value addressing a non-existent address as you suggest, or it could be a write access to a read-only register, or a non-secure access to a secure register (or any other protection violation), or it could be more peripheral function specific reasons you might need to signal an error (maybe trying to configure a peripheral into an unsupported mode).

    Basically there is no defined reason when you CAN signal an error, it is there for you as the peripheral designer to use as required.

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