ZQCS_STATUS (DDR_QOS_CTRL) Register

Zynq UltraScale+ Devices Register Reference (UG1087)

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

ZQCS_STATUS (DDR_QOS_CTRL) Register Description

Register NameZQCS_STATUS
Offset Address0x000000001C
Absolute Address 0x00FD09001C (DDR_QOS_CTRL)
Width32
TypemixedMixed types. See bit-field details.
Reset Value0x00000000
DescriptionZQCS Status Register

ZQCS_STATUS (DDR_QOS_CTRL) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
Reserved31:1razRead as zero0x0Reserved for future use
BUSY 0roRead-only0x0QoS Controller may initiate a ZQCS (ZQ calibration short) operation only if this signal is low. This signal goes high in the clock after the uMCTL2 accepts the ZQCS request. It goes low when the ZQCS operation is initiated in the uMCTL2. It is recommended not to perform ZQCS operations when this signal is high.
0 - Indicates that the QoS Controller can initiate a ZQCS operation
1 - Indicates that ZQCS operation has not been initiated yet in the uMCTL2