32-bit ARM Cortex™-M3 MCU
HT32F1251/51B/52/53
Table of Contents
1 General Description................................................................................................ 6
2 Features................................................................................................................... 7
Core.......................................................................................................................................7
On-chip Memory ....................................................................................................................7
Flash Memory Controller .......................................................................................................8
Reset Control Unit .................................................................................................................8
Clock Control Unit..................................................................................................................8
Power Management...............................................................................................................9
Analog to Digital Converter....................................................................................................9
Analog Operational Amplifier/Comparator ............................................................................. 9
I/O Ports...............................................................................................................................10
PWM Generation and Capture Timers.................................................................................10
Watchdog Timer................................................................................................................... 11
Real Time Clock................................................................................................................... 11
Inter-integrated Circuit (I2C).................................................................................................12
Serial Peripheral Interface (SPI)..........................................................................................12
Universal Synchronous Asynchronous Receiver Transmitter (USART)............................... 13
Debug Support.....................................................................................................................13
Package and Operation Temperature..................................................................................13
3 Overview................................................................................................................ 14
Device Information...............................................................................................................14
Block Diagram .....................................................................................................................15
Memory Map........................................................................................................................16
Clock Structure ....................................................................................................................17
Pin Assignment....................................................................................................................18
4 Electrical Characteristics..................................................................................... 22
Absolute Maximum Ratings.................................................................................................22
DC Characteristics...............................................................................................................22
On-Chip LDO Voltage Regulator Characteristics................................................................. 22
Power Consumption ............................................................................................................23
Reset and Supply Monitor Characteristics........................................................................... 23
External Clock Characteristics.............................................................................................24
Internal Clock Characteristics..............................................................................................25
PLL Characteristics..............................................................................................................26
Memory Characteristics.......................................................................................................26
Rev. 1.00
2 of 35
May 27, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
