Byte-enabled transfer for a data bus having fixed-byte data transfer
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United States of America Patent
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Feb 14, 2006
Grant Date -
Mar 4, 2004
app pub date -
Aug 28, 2002
filing date -
Aug 28, 2002
priority date (Note) -
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Abstract
A data bus system transfers words and word portions on a data bus between master devices and slave devices. A size bus carries a size code in fixed-byte format that identifies a number of bytes being transferred in one or more words and/or word portions of a transaction. A byte-enable bus carries a byte-enable code that identifies valid bytes of a word. An interface decodes the byte-enable codes to size codes and, where an odd-byte byte-enable code is decoded, it decodes the odd-byte byte-enable code to a plurality of size codes.
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