Rev. 1.51

3 of 50

April 11, 2017

HT32F52231/HT32F52241/HT32F52331/HT32F52341

5 Electrical Characteristics..................................................................................... 32

Absolute Maximum Ratings ................................................................................................. 32

Recommended DC Operating Conditions ........................................................................... 32

On-Chip LDO Voltage Regulator Characteristics................................................................. 32

Power Consumption ............................................................................................................ 33

Reset and Supply Monitor Characteristics........................................................................... 35

External Clock Characteristics............................................................................................. 36

Internal Clock Characteristics .............................................................................................. 37

PLL Characteristics.............................................................................................................. 37

Memory Characteristics ....................................................................................................... 37

I/O Port Characteristics........................................................................................................ 38

ADC Characteristics ............................................................................................................ 39

SCTM/GPTM/MCTM Characteristics................................................................................... 40

I2C Characteristics ............................................................................................................... 41

SPI Characteristics .............................................................................................................. 42

USB Characteristics............................................................................................................. 44

6 Package Information ............................................................................................ 45

24-pin SSOP (150mil) Outline Dimensions.......................................................................... 46

28-pin SSOP (150mil) Outline Dimensions.......................................................................... 47

SAW Type 33-pin (4mm×4mm) QFN Outline Dimensions................................................... 48

48-pin LQFP (7mm×7mm) Outline Dimensions................................................................... 49