Method and apparatus for synchronizing data transfer

Details Method and apparatus for synchronizing data transfer Method and apparatus for synchronizing data transfer

1997-12-23

2000-03-07

Palys, Joseph E.

Metal tools and implements, making

713400, G06F 112

Patent

active

06033441&

ABSTRACT:
A transfer of data between the first clock domain to the second clock domain is synchronized in a situation in which the first clock signal in the first clock domain is generated from a source independent from the second clock signal in the second clock domain. The ratio of one frequency to another is determined along with the phase relationship between the two clock signals during a selected period of time. Then, the phase relationship is predicted for a future period of time. This prediction of the relationship between the two clock signals serves as an input to a control mechanism, which prevents sampling of data and control signals when they are transitioned from one state to another.

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