Padding - 9.0 English

Tri-Mode Ethernet MAC LogiCORE IP Product Guide (PG051)

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9.0 English

When fewer than 46 bytes of data are supplied by you to the MAC core, the transmitter module adds padding up to the minimum frame length. The exception to this is when the MAC core is configured for user-passed FCS. In this case, you must also supply the padding to maintain the minimum frame length.