If you have a large set of commands most of which have the same value in the
columns, you can set default values to these and specify the keyword DEFAULT or leave it
blank in the respective columns. In the following example, you should always send the
same address 0 except in the third command where it is to a different address. Hence,
specify the default address as 0 and override it to
'hA5A5_A5A5 in the third command.
You can also set the default Write and Read bandwidths. The units are specified in Mb/s. When the default bandwidth is specified, the AXI-TG internally calculates the delay to be applied between consecutive AXI transactions to achieve the specified bandwidth.
The calculation assumes an ideal AXI slave which does not apply any back
pressure (All READY signals of AXI3 are always asserted). In case the slave applies back
pressure, the AXI-TG does not push traffic at the specified bandwidth and the actual
bandwidth is lower. You can specify either the default bandwidth or the default
intra_byte_delay (as both commands
indirectly control the delay in the AXI transactions). The latest command overrides the