Method and system for distributing a global timebase within a system-on-chip having multiple clock domains
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United States of America Patent
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May 29, 2012
Grant Date -
Jan 7, 2010
app pub date -
Jul 2, 2008
filing date -
Jul 2, 2008
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Abstract
A global timebase system and method for a system-on-chip synchronizes multiple clock domains in each of a plurality of receiver modules by broadcasting a global timebase count value as Gray code over a global timebase bus. A global timebase generator includes a binary counter and a binary-to-Gray-code converter. Each receiver module registers the global timebase count value with its own local clock and includes a Gray-code-to-binary converter. The converted value, in binary form, may be used as least significant bits of a globally synchronized local timebase. Most significant bits may be generated by a local binary counter incremented at each 1-to-0 transition of the most significant bit of the global timebase count value.
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