RTC_INIT (INIT)

RTC_CAL (CAL)

RTC_LXTCTL (LXTCTL)

RTC_LXTOCTL (LXTOCTL)

RTC_LXTICTL (LXTICTL)

RTC_PF2CTL (PF2CTL)

RTC_DSTCTL (DSTCTL)

RTC_CLKFMT (CLKFMT)

RTC_WEEKDAY (WEEKDAY)

RTC_TALM (TALM)

RTC_CALM (CALM)

RTC_LEAPYEAR (LEAPYEAR)

RTC_INTEN (INTEN)

RTC_INTSTS (INTSTS)

RTC_TICK (TICK)

RTC_TAMSK (TAMSK)

RTC_CAMSK (CAMSK)

RTC_RWEN (RWEN)

RTC_FREQADJ (FREQADJ)

RTC_TIME (TIME)

INIT_ACTIVE : RTC Active Status (Read Only)
bits : 0 - 0 (1 bit)
access : read-only

Enumeration:

End of enumeration elements list.

INIT : RTC Initiation When RTC block is first powered on, RTC is at reset state. User has to write a special number 0xA5EB1357 to INIT to make RTC leaving reset state. Once the INIT is written as 0xA5EB1357 the RTC will be at normal active state permanently. The INIT[31:1] is a write-only field and read value will be always 0.
bits : 1 - 31 (31 bit)
access : read-write

DAY : 1-Day Calendar Digit (0~9)
bits : 0 - 3 (4 bit)
access : read-write

TENDAY : 10-Day Calendar Digit (0~3)
bits : 4 - 5 (2 bit)
access : read-write

MON : 1-Month Calendar Digit (0~9)
bits : 8 - 11 (4 bit)
access : read-write

TENMON : 10-Month Calendar Digit (0~1)
bits : 12 - 12 (1 bit)
access : read-write

YEAR : 1-Year Calendar Digit (0~9)
bits : 16 - 19 (4 bit)
access : read-write

TENYEAR : 10-Year Calendar Digit (0~9)
bits : 20 - 23 (4 bit)
access : read-write

GAIN : Oscillator Gain Option User can select oscillator gain according to crystal external loading and operating temperature range. The larger gain value corresponding to stronger driving capability and higher power consumption.
bits : 1 - 3 (3 bit)
access : read-write

Enumeration:

End of enumeration elements list.

OPMODE : I/O Pin Operation Mode
bits : 0 - 1 (2 bit)
access : read-write

Enumeration:

End of enumeration elements list.

DOUT : I/O Pin Output Data
bits : 2 - 2 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CTLSEL : I/O Pin State Backup Selection When low speed 32 kHz oscillator (LXT) is disabled, X32KO pin can be used as GPIO PF.0 function. User can program CTLSEL to decide X32KO (PF.0) I/O function is controlled by system power domain GPIO module or VBAT power domain RTC_LXTOCTL register. Note: CTLSEL will be set to 1 automatically by hardware when system power is turned off and RTC is at normal active state, ACTIVE (RTC_INIT[0]) is 1.
bits : 3 - 3 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

OPMODE : I/O Pin Operation Mode
bits : 0 - 1 (2 bit)
access : read-write

Enumeration:

End of enumeration elements list.

DOUT : IO Pin Output Data
bits : 2 - 2 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CTLSEL : I/O Pin State Backup Selection When low speed 32 kHz oscillator (LXT) is disabled, X32KO pin can be used as GPIO PF.1 function. User can program CTLSEL to decide X32KI (PF.1) I/O function is controlled by system power domain GPIO module or VBAT power domain RTC_LXTICTL register. Note: CTLSEL will be set to 1 automatically by hardware when system power is turned off and RTC is at normal active state, ACTIVE (RTC_INIT[0]) is 1.
bits : 3 - 3 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

OPMODE : I/O Pin Operation Mode
bits : 0 - 1 (2 bit)
access : read-write

Enumeration:

End of enumeration elements list.

DOUT : I/O Pin Output Data
bits : 2 - 2 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CTLSEL : I/O Pin State Backup Selection User can program CTLSEL to decide GPIO PF.2 I/O function is controlled by system power domain GPIO module or VBAT power domain RTC_LXTICTL register. Note: CTLSEL will be set to 1 automatically by hardware when system power is turned off and RTC is at normal active state, ACTIVE (RTC_INIT[0]) is 1.
bits : 3 - 3 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

ADDHR : Add 1 Hour
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

SUBHR : Subtract 1 Hour
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

DSBAK : Daylight Saving Back
bits : 2 - 2 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

_24HEN : 24-hour / 12-hour Time Scale Selection Indicates that RTC_TIME and RTC_TALM register are in 24-hour time scale or 12-hour time scale
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

WEEKDAY : Day of the Week Register Note: RTC will not check WEEKDAY setting with RTC_CAL is reasonable or not.
bits : 0 - 2 (3 bit)
access : read-write

Enumeration:

End of enumeration elements list.

SEC : 1-Sec Time Digit of Alarm Setting (0~9)
bits : 0 - 3 (4 bit)
access : read-write

TENSEC : 10-Sec Time Digit of Alarm Setting (0~5)
bits : 4 - 6 (3 bit)
access : read-write

MIN : 1-Min Time Digit of Alarm Setting (0~9)
bits : 8 - 11 (4 bit)
access : read-write

TENMIN : 10-Min Time Digit of Alarm Setting (0~5)
bits : 12 - 14 (3 bit)
access : read-write

HR : 1-Hour Time Digit of Alarm Setting (0~9)
bits : 16 - 19 (4 bit)
access : read-write

TENHR : 10-Hour Time Digit of Alarm Setting (0~2)When RTC runs as 12-hour time scale mode, RTC_TIME[21] (the high bit of TENHR[1:0]) means AM/PM indication (If RTC_TIME[21] is 1, it indicates PM time message.)
bits : 20 - 21 (2 bit)
access : read-write

DAY : 1-Day Calendar Digit of Alarm Setting (0~9)
bits : 0 - 3 (4 bit)
access : read-write

TENDAY : 10-Day Calendar Digit of Alarm Setting (0~3)
bits : 4 - 5 (2 bit)
access : read-write

MON : 1-Month Calendar Digit of Alarm Setting (0~9)
bits : 8 - 11 (4 bit)
access : read-write

TENMON : 10-Month Calendar Digit of Alarm Setting (0~1)
bits : 12 - 12 (1 bit)
access : read-write

YEAR : 1-Year Calendar Digit of Alarm Setting (0~9)
bits : 16 - 19 (4 bit)
access : read-write

TENYEAR : 10-Year Calendar Digit of Alarm Setting (0~9)
bits : 20 - 23 (4 bit)
access : read-write

LEAPYEAR : Leap Year Indication Register (Read Only)
bits : 0 - 0 (1 bit)
access : read-only

Enumeration:

End of enumeration elements list.

ALMIEN : Alarm Interrupt Enable Bit
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

TICKIEN : Time Tick Interrupt Enable Bit
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

ALMIF : RTC Alarm Interrupt Flag When current RTC counter in RTC_TIME and RTC_CAL are matched RTC alarm settings in RTC_TALM and RTC_CALM, ALMIF will be set to 1 and an alarm interrupt signal will be generated if ALMIEN (RTC_INTEN[0]) is enabled. Chip will also be waken up when alarm interrupt signal occurred if chip is running at Power-down mode. Note: Writing 1 to clear this bit.
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

TICKIF : RTC Time Tick Interrupt Flag When RTC time tick event happened, TICKIF will be set to 1 and a time tick interrupt signal will be generated if TICKIEN (RTC_INTEN[1]) is enabled. Chip will also be waken up when time tick interrupt signal occurred if chip is running at Power-down mode. Note: Writing 1 to clear this bit.
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

TICK : Time Tick Register These bits are used to select RTC time tick period for periodic time tick interrupt request.
bits : 0 - 2 (3 bit)
access : read-write

Enumeration:

End of enumeration elements list.

MSEC : Mask 1-Sec Time Digit of alarm setting (0~9)
bits : 0 - 0 (1 bit)
access : read-write

MTENSEC : Mask 10-Sec Time Digit of alarm setting (0~5)
bits : 1 - 1 (1 bit)
access : read-write

MMIN : Mask 1-Min Time Digit of alarm setting (0~9)
bits : 2 - 2 (1 bit)
access : read-write

MTENMIN : Mask 10-Min Time Digit of alarm setting (0~5)
bits : 3 - 3 (1 bit)
access : read-write

MHR : Mask 1-hour Time Digit of Alarm Setting (0~9) Note: MHR function is only for 24-hour time scale mode.
bits : 4 - 4 (1 bit)
access : read-write

MTENHR : Mask 10-hour Time Digit of Alarm Setting (0~2) Note: MTENHR function is only for 24-hour time scale mode.
bits : 5 - 5 (1 bit)
access : read-write

MDAY : Mask 1-Day Calendar Digit of alarm setting (0~9)
bits : 0 - 0 (1 bit)
access : read-write

MTENDAY : Mask 10-Day Calendar Digit of alarm setting (0~3)
bits : 1 - 1 (1 bit)
access : read-write

MMON : Mask 1-Month Calendar Digit of alarm setting (0~9)
bits : 2 - 2 (1 bit)
access : read-write

MTENMON : Mask 10-Month Calendar Digit of alarm setting (0~1)
bits : 3 - 3 (1 bit)
access : read-write

MYEAR : Mask 1-Year Calendar Digit of alarm setting (0~9)
bits : 4 - 4 (1 bit)
access : read-write

MTENYEAR : Mask 10-Year Calendar Digit of alarm setting (0~9)
bits : 5 - 5 (1 bit)
access : read-write

RWEN : RTC Register Access Enable Password (Write Only) Writing 0xA965 to this field will enable RTC register access period and keep 1024 RTC clocks. Note: Writing others vaule will clear RWENF and disable RTC register access function immediately.
bits : 0 - 15 (16 bit)
access : write-only

RWENF : RTC Register Access Enable Bit (Read Only) Note1: This bit will be set after RWEN is load a 0xA965, and be cleared automatically after 1024 RTC clocks expired. Note2: RWENF will be mask to 0 during RTCBUSY is 1, and first turn on RTCCKEN (CLK_APBCLK[1]) also.
bits : 16 - 16 (1 bit)
access : read-only

Enumeration:

End of enumeration elements list.

RTCBUSY : RTC Write Busy Flag This bit indicates RTC registers are writable or not. Note: RTCBUSY falg will be set when execute write RTC register command exceed 6 times within 1120 PCLK cycles.
bits : 24 - 24 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

FREQADJ : Frequency Compensation Value User has to get actual clock frequency of LXT, LXT frequency. Note: This formula is suitable only when RTCSEL (CLK_CLKSEL2[18]) is 0, RTC clock source is from LXT.
bits : 0 - 21 (22 bit)
access : read-write

SEC : 1-Sec Time Digit (0~9)
bits : 0 - 3 (4 bit)
access : read-write

TENSEC : 10-Sec Time Digit (0~5)
bits : 4 - 6 (3 bit)
access : read-write

MIN : 1-Min Time Digit (0~9)
bits : 8 - 11 (4 bit)
access : read-write

TENMIN : 10-Min Time Digit (0~5)
bits : 12 - 14 (3 bit)
access : read-write

HR : 1-Hour Time Digit (0~9)
bits : 16 - 19 (4 bit)
access : read-write

TENHR : 10-hour Time Digit (0~2) Note: When RTC runs as 12-hour time scale mode, RTC_TIME[21] (the high bit of TENHR[1:0]) means AM/PM indication, RTC_TIME[21] is 0 means AM hour and RTC_TIME[21] is 1 means PM hour.
bits : 20 - 21 (2 bit)
access : read-write