Zynq UltraScale+ Devices Register Reference > Module Summary > DDR_PHY Module > ZQ0PR1 (DDR_PHY) Register

ZQ0PR1 (DDR_PHY) Register

ZQ0PR1 (DDR_PHY) Register Description

Register NameZQ0PR1
Relative Address0x0000000688
Absolute Address 0x00FD080688 (DDR_PHY)
Width32
TypemixedMixed types. See bit-field details.
Reset Value0x00000B0B
DescriptionZQ 0 Impedance Control Program Register 1

ZQ0PR1 (DDR_PHY) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
Reserved31:15roRead-only0x0Reserved. Return zeros on reads.
PU_REFSEL14:8rwNormal read/write0xBPull-up REFSEL for PZCTRL cell
Reserved 7roRead-only0x0Reserved. Return zeros on reads.
PD_REFSEL 6:0rwNormal read/write0xBPull-down REFSEL for PZCTRL cell