Zynq UltraScale+ Devices Register Reference > Module Summary > RTC Module > CALIB_READ (RTC) Register

CALIB_READ (RTC) Register

CALIB_READ (RTC) Register Description

Register NameCALIB_READ
Relative Address0x000000000C
Absolute Address 0x00FFA6000C (RTC)
Width21
TyperoRead-only
Reset Value0x00000000
DescriptionRead-back Calibration Value.

This register reads back the calibration value that was programmed in the RTC

CALIB_READ (RTC) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
Fraction_En20roRead-only0x0This bit can be used to check if the fractional compensation feature was enabled.
Fraction_Data19:16roRead-only0x0Number of cycles at which the RTC gets one clock cycle ahead of the real time due to the cumulative fractional inaccuracy of the Oscillator.
Max_Tick15:0roRead-only0x0Register value multiplied by the period of the oscillator should equal to 1 second.