DDR_CNTRL (PMU_GLOBAL) Register - UG1087

Zynq UltraScale+ Devices Register Reference (UG1087)

Document ID
UG1087
Release Date
2024-03-13
Revision
1.10

DDR_CNTRL (PMU_GLOBAL) Register Description

Register NameDDR_CNTRL
Offset Address0x0000000070
Absolute Address 0x00FFD80070 (PMU_GLOBAL)
Width 1
TyperwNormal read/write
Reset Value0x00000000
DescriptionDDR Output Signal Latch Control.

Register is reset only by a POR reset.

DDR_CNTRL (PMU_GLOBAL) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
RET 0rwNormal read/write0x0Signal Output Retention Control. Write sequence operation.
Transition 0 to 1: latch DDR outputs to current state.
Transition 1 to 0: allow DDR controller to control outputs.
Transitions 0 to 0 and 1 to 1 have no effect.
The PMU firmware can hold the state of the DDR output buffers while the DDR controller is powered-down.