Receive Pause Quanta Presentation Interface - 2.1 English

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

Document ID
PG369
Release Date
2023-04-12
Version
2.1 English

When a receive packet is identified as either a global or priority pause control packet, the received quanta value(s) will be extracted accordingly. Those quanta values are presented on the DCMAC Subsystem’s rx_pause_quanta{0..8} buses, along with rx_pause_valid that qualifies the data, and rx_pause_valid_id that identifies the receiving port. Priority pause information is relayed via quanta values 0 to 7, while global pause information is relayed on the rx_pause_quanta8 bus. The pause control parsing logic is always active, and any packet that meets the criteria specified above in ‘Identifying Pause Packets’ will have its quanta information relayed on the rx_pause_quanta buses. It is true regardless of the setting of c{0..5}_ctl_rx_pause_enable.