Zynq UltraScale+ Devices Register Reference > Module Summary > DDR_PHY Module > ZQ1PR1 (DDR_PHY) Register
Register Name | ZQ1PR1 |
---|---|
Relative Address | 0x00000006A8 |
Absolute Address | 0x00FD0806A8 (DDR_PHY) |
Width | 32 |
Type | mixedMixed types. See bit-field details. |
Reset Value | 0x00000B0B |
Description | ZQ 1 Impedance Control Program Register 1 |
Field Name | Bits | Type | Reset Value | Description |
---|---|---|---|---|
Reserved | 31:15 | roRead-only | 0x0 | Reserved. Return zeros on reads. |
PU_REFSEL | 14:8 | rwNormal read/write | 0xB | Pull-up REFSEL for PZCTRL cell |
Reserved | 7 | roRead-only | 0x0 | Reserved. Return zeros on reads. |
PD_REFSEL | 6:0 | rwNormal read/write | 0xB | Pull-down REFSEL for PZCTRL cell |