s_axis_tx_tstrb - s_axis_tx_tstrb - 4.4 English - PG156

Use s_axis_cc_tkeep with Byte Count Descriptor (s_axis_cc_tdata[28:16]) to indicate the byte enables for the last Dword of the payload.

The following table shows the mapping between s_axis_cc_tkeep from the Completer Completion interface and the s_axis_tx_tstrb signal bus from the AXI4-Stream (Basic) Transmit interface when tlast is not asserted.