ETH_MAC_SYSTEM_TIME_NANOSECONDS

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Interpret as ETH_MAC_SYSTEM_TIME_NANOSECONDS

System Time Nanoseconds Register

TSSS	Timestamp Sub Seconds The value in this field has the sub-second representation of time, with an accuracy of 0.46 ns. When the ETH_MAC_TIMESTAMP_CONTROL[TSCTRLSSR] bit is set, each bit represents 1 ns. The maximum value is 0x3B9A_C9FF after which it rolls-over to zero.

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