Holtek HT32F54231 User Manual page 3

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F54231/HT32F54241/HT32F54243/HT32F54253
Flash Vector Mapping Control Register - VMCR ........................................................................... 63
Flash Manufacturer and Device ID Register - MDID ...................................................................... 64
Flash Page Number Status Register - PNSR ................................................................................ 65
Flash Page Size Status Register - PSSR ...................................................................................... 66
Device ID Register - DIDR ............................................................................................................. 66
Flash Pre-fetch Control Register - CFCR ...................................................................................... 67
Custom ID Register n - CIDRn (n = 0 ~ 3) ..................................................................................... 68
5 Power Control Unit (PWRCU) .............................................................................. 69
Introduction .......................................................................................................................... 69
Features ............................................................................................................................... 70
Functional Descriptions ....................................................................................................... 70
V Power Domain .......................................................................................................................... 70
DD
V Power Domain ....................................................................................................................... 72
CORE
Operation Modes ............................................................................................................................ 72
Register Map ....................................................................................................................... 74
Register Descriptions ........................................................................................................... 75
Power Control Status Register - PWRSR ...................................................................................... 75
Power Control Register - PWRCR ................................................................................................. 76
Low Voltage / Brown Out Detect Control and Status Register - LVDCSR ..................................... 78
Power Control LDO Status Register - PWRLDOSR ...................................................................... 79
6 Clock Control Unit (CKCU) .................................................................................. 80
Introduction .......................................................................................................................... 80
Features ............................................................................................................................... 82
Functional Descriptions ....................................................................................................... 82
High Speed External Crystal Oscillator - HSE ............................................................................... 82
High Speed Internal RC Oscillator - HSI ........................................................................................ 83
Auto Trimming of High Speed Internal RC Oscillator - HSI ............................................................ 83
Phase Locked Loop - PLL .............................................................................................................. 85
Low Speed External Crystal Oscillator - LSE ................................................................................. 86
Low Speed Internal RC Oscillator - LSI ......................................................................................... 87
Clock Ready Flag ........................................................................................................................... 87
System Clock (CK_SYS) Selection ................................................................................................ 87
HSE Clock Monitor ......................................................................................................................... 88
Clock Output Capability .................................................................................................................. 88
Register Map ....................................................................................................................... 89
Register Descriptions ........................................................................................................... 90
Global Clock Configuration Register - GCFGR .............................................................................. 90
Global Clock Control Register - GCCR .......................................................................................... 91
Global Clock Status Register - GCSR ........................................................................................... 92
Global Clock Interrupt Register - GCIR .......................................................................................... 93
PLL Configuration Register - PLLCFGR ........................................................................................ 94
PLL Control Register - PLLCR ....................................................................................................... 95
Rev. 1.00 3 of 576 January 28, 2022