Rev. 1.21

2 of 39

April 11, 2017

HT32F52220/HT32F52230

Table of Contents

1 General Description................................................................................................ 6

2 Features................................................................................................................... 7

Core ....................................................................................................................................... 7

On-chip Memory .................................................................................................................... 7

Flash Memory Controller – FMC............................................................................................ 7

Reset Control Unit – RSTCU ................................................................................................. 8

Clock Control Unit – CKCU.................................................................................................... 8

Power Management – PWRCU ............................................................................................. 8

External Interrupt/Event Controller – EXTI ............................................................................ 9

Analog to Digital Converter – ADC ........................................................................................ 9

I/O Ports – GPIO.................................................................................................................... 9

PWM Generation and Capture Timers – GPTM .................................................................. 10

Single Channel Generation and Capture Timers – SCTM................................................... 10

Basic Function Timer – BFTM ............................................................................................. 10

Watchdog Timer – WDT....................................................................................................... 11

Inter-integrated Circuit – I2C ................................................................................................ 11

Serial Peripheral Interface – SPI ......................................................................................... 12

Universal Synchronous Asynchronous Receiver Transmitter – USART.............................. 12

Universal Asynchronous Receiver Transmitter – UART ...................................................... 13

Debug Support..................................................................................................................... 13

Package and Operation Temperature.................................................................................. 13

3 Overview................................................................................................................ 14

Device Information............................................................................................................... 14

Block Diagram ..................................................................................................................... 15

Memory Map........................................................................................................................ 16

Clock Structure .................................................................................................................... 18

4 Pin Assignment..................................................................................................... 19

5 Electrical Characteristics..................................................................................... 24

Absolute Maximum Ratings ................................................................................................. 24

Recommended DC Operating Conditions ........................................................................... 24

On-Chip LDO Voltage Regulator Characteristics................................................................. 24