Decommissioning a Port or Channel when not in Use - 2.1 English

Versal ACAP 600G Channelized Multirate Ethernet Subsystem (DCMAC) LogiCORE IP Product Guide (PG369)

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2.1 English

In DCMAC FixedE mode, when a port is not in use, it can be decommissioned as follows:

  • Set ctl_rx/tx_data_rate=0 (100G)
    • Not necessary on ports 1, 3, 5 as these ports only support 100G and therefore have no data rate control
  • Assert serdes reset and channel flush for the given port
  • Set ctl_mem_disable_rx/tx_serdes_clk[port]=1 and ctl_mem_disable_rx/tx_flexif_clk[port]=1 to save power

The process is the same for the PHY side of the device in Independent mode, excluding the channel flush as the MAC and PHY are operating independently. On the MAC side, channel flush for a given channel is asserted to decommission that channel.