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21489 SVS

Question asked by pwatts on Oct 30, 2013
Latest reply on Nov 3, 2013 by Harshit.Gaharwar

Hi, I have a few questions on the SVS for the 21489:

 

1) The datasheet confirms the Absolute Maximum VDD_INT as 1.32V, yet the maximum value in the register control is 1.4375V. Does this mean that there are some extreme cases where VDD_INT will have to exceed the absolute maximum value, or will the register value always be <1.3V?

 

2) Is there any data of how SVS affects MTBF?

 

3) SVS appears to be a solution to extract maximum performance yet retaining high power efficiency. The penalty of this however is raised cost, board space and risk for malfunction during development. If one doesn't mind a drop in power efficiency, isn't there a certain blanket VDD_INT value that one can use that will yield the same speed increase?

The ADSP21479 appears to behave like this, where raising VDD_INT to higher values corresponds to increased performance.

 

Thanks,

Pierre

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