17.5.11.16 Step 15

Update UDDRC_RFSHCTL3 to enable auto-refreshes by clearing DIS_AUTO_REFRESH.
Toggle UDDRC_RFSHCTL3.REFRESH_UPDATE_LEVEL.
Update UDDRC_SWCTL to enable quasi-dynamic register programming.
Update UDDRC_DFIMISC to set DFI_INIT_COMPLETE_EN.
Set UDDRC_SWCTL.SW_DONE to indicate that UDDRC programming is completed.
- Poll the UDDRC_SWSTAT.SW_DONE_ACK bit until it changes to 1, acknowledging that programming is complete.
Update Port Control registers for ports 0 to 4 (UDDRC_PCTRL_0 to UDDRC_PCTRL_4) to enable the AXI ports.

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