Address Swap - 9.0 English

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

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9.0 English

The address swap module can be enabled for use on the loopback path. This would allow the example design, targeted to a suitable board, to be connected to an Ethernet protocol tester. The address swap module waits until both the DA and SA have been received before starting to send data to the TX FIFO.

Figure 1. Modification of Frame Data by Address Swap Module

If enabled, the module swaps the destination and source addresses of each frame as shown in the previous figure. To ensure that the outgoing frame destination address matches the source address of the link partner, otherwise the DA and SA are left untouched. The module transmits the frame control signals with equal latency to the frame data.