NuMicro® NUC029LEE/NUC029SEE32-bit Arm® Cortex® -M0 MicrocontrollerAug, 2018 Page 318 of 497 Rev 1.00NUMICRO® NUC029LEE/NUC029SEE TECHNICAL REFERENCE MANUAL(SPRCTL[2] SPR Register Enable) before writing one of 20 spare registers (SPR0 ~ SPR19).User could read SPRRDY (SPRCTL[7] SPR Register Ready) to check if data has been writteninto registers or not. User could only access the spare registers again once SPRRDY is 1. Anyaccess to spare registers is available if SPRRDY is 0.If external 32 kHz clock (LXT) is not available in system design, user can choose RTC_SEL_10K(CLKSEL2[18]) to 1 to use on chip 10 kHz clock (LIRC) instead of for spare registers read andwrite operations.6.12.6 Register MapR: read only, W: write only, R/W: both read and writeRegister Offset R/W Description Reset ValueRTC Base Address:RTC_BA = 0x4000_8000INIR RTC_BA+0x00 R/W RTC Initiation Register 0x0000_0000AER RTC_BA+0x04 R/W RTC Access Enable Register 0x0000_0000FCR RTC_BA+0x08 R/W RTC Frequency Compensation Register 0x0000_0700TLR RTC_BA+0x0C R/W Time Loading Register 0x0000_0000CLR RTC_BA+0x10 R/W Calendar Loading Register 0x0005_0101TSSR RTC_BA+0x14 R/W Time Scale Selection Register 0x0000_0001DWR RTC_BA+0x18 R/W Day of the Week Register 0x0000_0006TAR RTC_BA+0x1C R/W Time Alarm Register 0x0000_0000CAR RTC_BA+0x20 R/W Calendar Alarm Register 0x0000_0000LIR RTC_BA+0x24 R Leap Year Indicator Register 0x0000_0000RIER RTC_BA+0x28 R/W RTC Interrupt Enable Register 0x0000_0000RIIR RTC_BA+0x2C R/W RTC Interrupt Indicator Register 0x0000_0000TTR RTC_BA+0x30 R/W RTC Time Tick Register 0x0000_0000SPRCTL RTC_BA+0x3C R/W RTC Spare Functional Control Register 0x0000_0080SPR0 RTC_BA+0x40 R/W RTC Spare Register 0 0x0000_0000SPR1 RTC_BA+0x44 R/W RTC Spare Register 1 0x0000_0000SPR2 RTC_BA+0x48 R/W RTC Spare Register 2 0x0000_0000SPR3 RTC_BA+0x4C R/W RTC Spare Register 3 0x0000_0000SPR4 RTC_BA+0x50 R/W RTC Spare Register 4 0x0000_0000SPR5 RTC_BA+0x54 R/W RTC Spare Register 5 0x0000_0000SPR6 RTC_BA+0x58 R/W RTC Spare Register 6 0x0000_0000
