Information exchange between locally synchronous circuits

Details Information exchange between locally synchronous circuits Information exchange between locally synchronous circuits

2007-02-27

2007-02-27

Cao, Chun (Department: 2115)

Electrical computers and digital processing systems: support

Clock control of data processing system, component, or data...

C713S500000

Reexamination Certificate

active

10500520

ABSTRACT:
A locally synchronous circuit module has a delay circuit having and input and output coupled to a clock input. The delay circuit provides a delay which when incorporated in a clock oscillator ensures a clock period that is at least as long as needed to transfer information between the storage elements. A handshake circuit is provided for generating handshake signals for timing information transfer between the locally synchronous circuit module and a further circuit. The handshake circuit comprises the delay circuit, so that at least part of the handshake signals during a handshake transaction are timed by traveling through the delay circuit and are applied to the clock input to clock the locally synchronous circuit module.

REFERENCES:
patent: 6425088 (2002-07-01), Yasukawa et al.
patent: 7065665 (2006-06-01), Jacobson et al.
Muttersbach et al., Practical Design of GLobally-Asynchronous Locally-Synchronous Systems, Apr. 2000, pp. 52-59.
Zhuang et al., An Asynchronous Wrapper with Novel Handshake Circuits for GALS Systems, Jul. 1, 2002, IEEE, 1521-1525.
Villiger et al., Self-timed Ring for Globally-Asynchronous Locally-Synchronous Systems, May 15, 2003, IEEE, pp. 1-10.

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