Low Latency Four-Flop Synchronizer with the Handshake Interface

Suk-Jin KIM  Jeong-Gun LEE  Kiseon KIM  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E88-D   No.7   pp.1460-1463
Publication Date: 2005/07/01
Online ISSN: 
DOI: 10.1093/ietisy/e88-d.7.1460
Print ISSN: 0916-8532
Type of Manuscript: Special Section LETTER (Special Section on Recent Advances in Circuits and Systems--Part 1)
Category: Communications and Wireless Systems
Keyword: 
synchronizer,  two-flop,  clock domain,  SoC,  

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Summary: 
This letter presents a synchronizer and its handshake interface for bridging clock domains in SoC. The proposed scheme uses a double two-flop synchronizer operated at different clock edges respectively, based on a two-phase handshake protocol. Performance analysis shows that the proposed design reduces latency up to a clock cycle, while retaining its safety to a tolerable level.