Aborting a Transmission - 4.0 English

10G/25G High Speed Ethernet Subsystem Product Guide (PG210)

Document ID
PG210
Release Date
2021-10-27
Version
4.0 English

The aborted transfer of a packet on the client interface is called an underrun. This can happen if a FIFO in the AXI Transmit client interface empties before a frame is completed.

This is indicated to the core in one of two ways:

  • An explicit error in which a frame transfer is aborted by deasserting tx_axis_tuser High while tx_axis_tlast is High. [see AXI4-Stream Interface]
  • An implicit underrun in which a frame transfer is aborted by deasserting tx_axis_tvalid without asserting tx_axis_tlast.