The following figure shows the transfer of data in
an AXI4-Stream channel. tvalid is driven by the source (master) side of the channel and tready is driven by the receiver (slave). tvalid indicates that the value in the payload fields
(tdata, tuser, and
tlast) is valid. tready indicates that the slave is ready to receive data. When both
tvalid and tready
are TRUE in a cycle, a transfer occurs. The master and slave set tvalid and tready respectively for the
next transfer appropriately. Some channels can be configured to have no tready, in which case the channel behaves as through there
was an implicit, permanently asserted tready.
Figure 1. Data Transfer in an AXI4-Stream
Channel
