Holtek HT32F54231 User Manual page 11

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F54231/HT32F54241/HT32F54243/HT32F54253
BFTM Control Register - BFTMCR .............................................................................................. 397
BFTM Status Register - BFTMSR ................................................................................................ 398
BFTM Counter Value Register - BFTMCNTR .............................................................................. 399
BFTM Compare Value Register - BFTMCMPR ........................................................................... 399
18 Real Time Clock (RTC) ..................................................................................... 400
Introduction ........................................................................................................................ 400
Features ............................................................................................................................. 400
Functional Descriptions ..................................................................................................... 401
RTC Related Register Reset ........................................................................................................ 401
Reading RTC Register .................................................................................................................. 401
Low Speed Clock Configuration ................................................................................................... 401
RTC Counter Operation ................................................................................................................ 402
Interrupt and Wakeup Control ....................................................................................................... 402
RTCOUT Output Pin Configuration............................................................................................... 402
Register Map ..................................................................................................................... 404
Register Descriptions ......................................................................................................... 404
RTC Counter Register - RTCCNT ................................................................................................ 404
RTC Compare Register - RTCCMP ............................................................................................. 405
RTC Control Register - RTCCR ................................................................................................... 406
RTC Status Register - RTCSR..................................................................................................... 408
RTC Interrupt and Wakeup Enable Register - RTCIWEN ............................................................ 409
19 Watchdog Timer (WDT) .................................................................................... 410
Introduction ........................................................................................................................ 410
Features ............................................................................................................................. 411
Functional Description ....................................................................................................... 411
Register Map ..................................................................................................................... 413
Register Descriptions ......................................................................................................... 413
Watchdog Timer Control Register - WDTCR ............................................................................... 413
Watchdog Timer Mode Register 0 - WDTMR0............................................................................. 414
Watchdog Timer Mode Register 1 - WDTMR1............................................................................. 415
Watchdog Timer Status Register - WDTSR ................................................................................. 416
Watchdog Timer Protection Register - WDTPR ........................................................................... 417
Watchdog Timer Clock Selection Register - WDTCSR ................................................................ 418
20 Inter-Integrated Circuit (I
Introduction ........................................................................................................................ 419
Features ............................................................................................................................. 420
Functional Descriptions ..................................................................................................... 420
Two-Wire Serial Interface ............................................................................................................. 420
START and STOP Conditions ....................................................................................................... 420
Data Validity .................................................................................................................................. 421
Addressing Format ....................................................................................................................... 421
Rev. 1.00
2 C) ............................................................................. 419
11 of 576 January 28, 2022