Do we need to verify reserved bits/registers in the verification procedure?

UVM
1

I would like to have a question related to reserved bits/registers.

As far as I know, reserved bits/registers are the one that could be used or configured for future uses or improvements for the hardware. From my logic, it serves no purposes to the hardware at all at the moment. Therefore, do we need to have a verification plan that includes these reserved bits/registers?

Please, give me some feedbacks and thoughts about this! Thank you so much

2

Hi Edward,

I don’t think we need to verify reserved bits/registers because while writing cover group these reserved bits are not considered for bin creation also.

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Consider mixing writes with random data to the reserved bits into your stimulus. That way, you can increase confidence that the reserved bits do in fact have no effect. You may wish also to verify the expected read value, if any (e.g. always 1 or always 0)

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Thank you for your reply. I will take notes for that

5

Thank you, I will try to write in those bits for further verification