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If your MPC configuration supports the AXI transaction gating feature, then software can use the CTRL register to gate AXI transactions while it updates the MPC registers. The CTRL.GATE_PRESENT bit indicates whether an MPC configuration supports AXI transaction gating.
To prevent spurious memory protection behavior when software is updating the MPC registers, it can gate AXI transactions so that no transactions are active during the update. However, software cannot gate AXI transactions if it has set configuration lockdown.
The following steps show an example of using the AXI gating feature: