7.10.6. D-sync, data address synchronization

D-sync provides synchronization of data addresses to enable compressed data addresses to be reliably decompressed. It is achieved by periodically outputting a full 5-byte address. This is output as part of the Normal data and Out-of-order placeholder packets as described in Data tracing.

D-sync occurs for the following reasons:

D-sync is not required on the first data transfer after a periodic I-sync packet.

It is usual that a single counter is used for both D-sync and I-sync, and that the counter values are staggered to reduce the likelihood of overflow.

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