4.3. ECRC Forwarding
On the Avalon-ST interface, the ECRC field follows the same alignment rules as payload data. For packets with payload, the ECRC is appended to the data as an extra dword of payload. For packets without payload, the ECRC field follows the address alignment as if it were a one dword payload. The position of the ECRC data for data depends on the address alignment. For packets with no payload data, the ECRC position corresponds to the position of Data0.
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