Rev. 1.51

4 of 50

April 11, 2017

HT32F52231/HT32F52241/HT32F52331/HT32F52341

List of Tables

Table 1. Features and Peripheral List ...................................................................................................... 16

Table 2. Register Map ............................................................................................................................. 19

Table 3. HT32F52231/52241 Series Pin Assignment for 24/28SSOP, 33QFN, 48LQFP Package.......... 28

Table 4. HT32F52331/52341 Series Pin Assignment for 33QFN, 48LQFP Package .............................. 29

Table 5. HT32F52231/52241 Pin Description .......................................................................................... 30

Table 6. HT32F52331/52341 Pin Description .......................................................................................... 31

Table 7. Absolute Maximum Ratings........................................................................................................ 32

Table 8. Recommended DC Operating Conditions.................................................................................. 32

Table 9. LDO Characteristics ................................................................................................................... 32

Table 10. HT32F52231/52241 Power Consumption Characteristics ....................................................... 33

Table 11. HT32F52331/52341 Power Consumption Characteristics ....................................................... 34

Table 12. VDD Power Reset Characteristics ............................................................................................. 35

Table 13. LVD/BOD Characteristics......................................................................................................... 35

Table 14. High Speed External Clock (HSE) Characteristics................................................................... 36

Table 15. Low Speed External Clock (LSE) Characteristics .................................................................... 36

Table 16. High Speed Internal Clock (HSI) Characteristics ..................................................................... 37

Table 17. Low Speed Internal Clock (LSI) Characteristics....................................................................... 37

Table 18. PLL Characteristics .................................................................................................................. 37

Table 19. Flash Memory Characteristics.................................................................................................. 37

Table 20. I/O Port Characteristics ............................................................................................................ 38

Table 21. ADC Characteristics ................................................................................................................. 39

Table 22. SCTM/GPTM/MCTM Characteristics ....................................................................................... 40

Table 23. I2C Characteristics.................................................................................................................... 41

Table 24. SPI Characteristics................................................................................................................... 42

Table 25. USB DC Electrical Characteristics ........................................................................................... 44

Table 26. USB AC Electrical Characteristics............................................................................................ 44