How AMBA CHI Specification Has Evolved
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2022-12-29
16:31:26
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原文网址：
https://community.cadence.com/cadence_blogs_8/b/fv/posts/how-amba-chi-specification-
has-evolved
原文网址：
https://community.cadence.com/cadence_blogs_8/b/fv/posts/how-amba-chi-specification-
has-evolved---chi-e-r-evolutionary
In my previous article (From AMBA ACE to CHI, Why Move for
Coherency?) I talked about how coherency needs have evolved from
AMBA ACE to the highly successful and widely adopted CHI
architecture.
Since the introduction of CHI, Arm has continually refined the
specifications with clarifications, improvements, and new features.
Let’s take a quick look at each update and understand why they are
important.
2017 (CHI-B) Issue B - first public release
Although there was an earlier Issue A version of the CHI specification a
few years prior, which defined the foundation of CHI architecture, it
was kept as a non-public release. Update Issue B officially announced
in 2017 was Arm’s first public CHI release. Issue B included all the key
features (layered functionality, packet-based communication, nodes
and unified channels, and credit resource management, etc)
introduced by Issue A plus enhancements.
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