4.6.5. CPRI Enhancements
The word alignment pattern (K28.5) position varies in byte deserialized data. Delay variation is up to ½ parallel clock cycle. You must add in extra user logic to manually check the K28.5 position in byte deserialized data for the actual latency.
|Existing Feature||Enhanced Feature|
|Manual alignment with bit position indicator provides deterministic latency. Delay variation up to 1 parallel clock cycle||Extra user logic to manipulate the TX bit slipper with a bit position indicator from the word aligner for constant total round-trip delay||Deterministic latency state machine alignment reduces the known delay variation in word alignment operation||None|
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