System and method for data transfer across multiple clock domain

Details System and method for data transfer across multiple clock domain System and method for data transfer across multiple clock domain

1998-01-15

2000-12-19

Ton, Dang

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

H04J 316

Patent

active

061635456

ABSTRACT:
A system for converting data in one clock domain to a second clock domain comprises a multiplexer which has a select control which is synchronous with a first frequency and is coupled to two bistable registers of which a first is clock controlled in accordance with the first frequency and a second is clock controlled by the second frequency. The data output of the first register is looped back to the second data input of the multiplexer. The select signal operates to couple a data input to the first register whereupon the multiplexer then serves to couple the data output of the first register back to the data input thereof. The arrangement ensures availability of data at the first clock frequency beyond a transition of the second clock frequency. Thus data, preferably multi-bit address data, can be transferred from one clock domain to another with less delay than in customary systems.

REFERENCES:
patent: 5282207 (1994-01-01), Jukevich et al.
patent: 5570348 (1996-10-01), Holden

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