Holtek HT32F52342 User Manual page 11

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52342/HT32F52352
18 Real Time Clock (RTC) ..................................................................................... 427
Introduction ........................................................................................................................ 427
Features ............................................................................................................................. 427
Functional Descriptions ..................................................................................................... 428
RTC Related Register Reset ........................................................................................................ 428
Reading RTC Register .................................................................................................................. 428
Low Speed Clock Configuration ................................................................................................... 428
RTC Counter Operation ................................................................................................................ 429
Interrupt and Wakeup Control ....................................................................................................... 429
RTCOUT Output Pin Configuration............................................................................................... 430
Register Map ..................................................................................................................... 431
Register Descriptions ......................................................................................................... 431
RTC Counter Register - RTCCNT ................................................................................................ 431
RTC Compare Register - RTCCMP ............................................................................................. 432
RTC Control Register - RTCCR ................................................................................................... 433
RTC Status Register - RTCSR..................................................................................................... 435
RTC Interrupt and Wakeup Enable Register - RTCIWEN ............................................................ 436
19 Watchdog Timer (WDT) .................................................................................... 437
Introduction ........................................................................................................................ 437
Features ............................................................................................................................. 437
Functional Description ....................................................................................................... 438
Register Map ..................................................................................................................... 440
Register Descriptions ......................................................................................................... 440
Watchdog Timer Control Register - WDTCR ............................................................................... 440
Watchdog Timer Mode Register 0 - WDTMR0............................................................................. 441
Watchdog Timer Mode Register 1 - WDTMR1............................................................................. 442
Watchdog Timer Status Register - WDTSR ................................................................................. 443
Watchdog Timer Protection Register - WDTPR ........................................................................... 444
Watchdog Timer Clock Selection Register - WDTCSR ................................................................ 445
20 Inter-Integrated Circuit (I
Introduction ........................................................................................................................ 446
Features ............................................................................................................................. 447
Functional Descriptions ..................................................................................................... 447
Two Wire Serial Interface .............................................................................................................. 447
START and STOP Conditions ....................................................................................................... 447
Data Validity .................................................................................................................................. 448
Addressing Format ....................................................................................................................... 449
Data Transfer and Acknowledge ................................................................................................... 451
Clock Synchronization .................................................................................................................. 452
Arbitration ..................................................................................................................................... 452
General Call Addressing ............................................................................................................... 453
Rev. 1.30
2 C) ............................................................................. 446
11 of 656 September 28, 2018