CONTROL (RTC) Register - UG1087

Zynq UltraScale+ Devices Register Reference (UG1087)

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

CONTROL (RTC) Register Description

Register NameCONTROL
Offset Address0x0000000040
Absolute Address 0x00FFA60040 (RTC)
Width32
TypemixedMixed types. See bit-field details.
Reset Value0x01000000
DescriptionControl.

CONTROL (RTC) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
Battery_Enable31woWrite-only0x0Enables the RTC. By writing a 0 to this bit, RTC will be powered off and the only module that potentially draws current from the battery will be BBRAM. The value read through this bit does not necessarily reflect whether RTC is enabled or not. It is expected that RTC is enabled every time it is being configured. If RTC is not used in the design, FSBL will disable it by writing a 0 to this bit.
0: RTC power off.
1: RTC power on.
Read-only.
Reserved30:28rwNormal read/write0x0Reserved
Osc_Cntrl27:24rwNormal read/write0x1Bit 24: Crystal Enable
Bit 25: Crystal Test Enable
Bits [27:26]: Reserved
Reserved23:1rwNormal read/write0x0Reserved
SLVERR_Enable 0rwNormal read/write0x0Enables SLVERR (Slave Error) if there is an access to an invalid register address. By default, this feature is disabled.
0: SLVERR is disabled. Writes are ignored and Reads return 0.
1: SLVERR is enabled. SLVERR is asserted. Writes are ignored and Reads return 0.