Holtek HT32F54231 User Manual page 6

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F54231/HT32F54241/HT32F54243/HT32F54253
EXTI Source Selection Register 0 - ESSR0 ................................................................................ 171
EXTI Source Selection Register 1 - ESSR1 ................................................................................ 172
GPIO Port x Configuration Low Register - GPxCFGLR, x = A, B, C, D ....................................... 173
GPIO Port x Configuration High Register - GPxCFGHR, x = A, B, C, D ...................................... 174
10 Nested Vectored Interrupt Controller (NVIC) .................................................. 175
Introduction ........................................................................................................................ 175
Features ............................................................................................................................. 176
Functional Descriptions ..................................................................................................... 177
SysTick Calibration ....................................................................................................................... 177
Register Map ..................................................................................................................... 177
11 External Interrupt/Event Controller (EXTI)......................................................... 178
Introduction ........................................................................................................................ 178
Features ............................................................................................................................. 178
Functional Descriptions ..................................................................................................... 179
Wakeup Event Management......................................................................................................... 179
External Interrupt/Event Line Mapping ......................................................................................... 179
Interrupt and Debounce ................................................................................................................ 180
Register Map ..................................................................................................................... 181
Register Descriptions ......................................................................................................... 182
EXTI Interrupt n Configuration Register - EXTICFGRn, n = 0 ~ 15 ............................................. 182
EXTI Interrupt Control Register - EXTICR ................................................................................... 183
EXTI Interrupt Edge Flag Register - EXTIEDGEFLGR ................................................................ 184
EXTI Interrupt Edge Status Register - EXTIEDGESR ................................................................. 185
EXTI Interrupt Software Set Command Register - EXTISSCR .................................................... 185
EXTI Interrupt Wakeup Control Register - EXTIWAKUPCR ........................................................ 186
EXTI Interrupt Wakeup Polarity Register - EXTIWAKUPPOLR ................................................... 187
EXTI Interrupt Wakeup Flag Register - EXTIWAKUPFLG ........................................................... 187
12 Analog to Digital Converter (ADC) .................................................................. 188
Introduction ........................................................................................................................ 188
Features ............................................................................................................................. 189
Functional Descriptions ..................................................................................................... 190
ADC Clock Setup .......................................................................................................................... 190
Channel Selection ......................................................................................................................... 190
Conversion Mode .......................................................................................................................... 190
Start Conversion on External Event .............................................................................................. 193
Sampling Time Setting .................................................................................................................. 194
Data Format .................................................................................................................................. 194
Analog Watchdog.......................................................................................................................... 194
Interrupts ....................................................................................................................................... 195
PDMA Request (HT32F54243/HT32F54253 only) ....................................................................... 195
Voltage Reference Generator ....................................................................................................... 195
Rev. 1.00 6 of 576 January 28, 2022