Difference between revisions of "Globally asynchronous locally synchronous"

Latest revision as of 17:11, 9 December 2011

This article provides insufficient context for those unfamiliar with the subject. Please help improve the article with a good introductory style. (December 2010)

Globally asynchronous locally synchronous (GALS) is a circuit that consists of a set of locally synchronous modules communicating with each other via asynchronous wrappers. Advantages include lower power consumption and electromagnetic interference (EMI). GALS is sometimes used in system-on-a-chip (SoC).

GALS is a compromise between a completely synchronous system (a single clock domain, perhaps with clock gating on some registers) and a completely asynchronous circuit (every register can be considered its own independent clock domain). Each synchronous subsystem ("clock domain") can run on its own independent clock frequency. ^[1]

See also

• Asynchronous circuit
• Asynchronous system
• clock domain crossing
• SIGNAL (a dataflow-oriented synchronous language enabling multi-clock and GALS specifications)

External links

• A Deterministic Globally Asynchronous Locally Synchronous Microprocessor Architecture
• Dataflow Architectures for GALS

1. ↑ Zhoukun WANG and Omar HAMMAMI. "A 24 Processors System on Chip FPGA Design with Network on Chip". [1]