The QoS-400 can be programmed to limit the command issue rate. The QoS-400 module is instantiated in almost all AXI masters in the system, Table: AXI Masters Without QoS-400 lists the exceptions. Table 15-7: AXI Masters Without QoS-400 AXI Master Rationale DPDMA Controller Classified as a video class master. CSU Issuing capability is one. PMU Issuing capability is one.