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Purpose of Reset Synchronizer

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muni123

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we use a reset synchronizer in an asynchronous reset design such that it doesnt issue reset in recovery or removal time.
Cant we use a synchronous reset in a design instead of going for a reset synchroniser in asynchronous reset design?
What would be the real purpose of reset synchronizer?
 

nsingh95

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muni123 said:
we use a reset synchronizer in an asynchronous reset design such that it doesnt issue reset in recovery or removal time.
Cant we use a synchronous reset in a design instead of going for a reset synchroniser in asynchronous reset design?
What would be the real purpose of reset synchronizer?

Hi,
You can use but it is not good to practice.
Suppose you use a syncronous reset in your design and your design gets reset due to some reason then the system will get reset on the next edge of clock[+ve or -ve] which nobody wants . So, the proper reset feature must be as soon as the reset is applied , your system must reset.
Thats why we generally use async reset .

Hope you are clear with this.
 

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