Flash MCU. HT45F3820 Datasheet

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HT45F3820 Datasheet
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Part HT45F3820
Description Ultrasonic Atomizer Flash MCU
Feature HT45F3820; Ultrasonic Atomizer Flash MCU HT45F3820 Revision: V1.11 Date: April 11, 2017 HT45F3820 Ultrasonic A.
Manufacture Holtek Semiconductor
Datasheet
Download HT45F3820 Datasheet




Holtek Semiconductor HT45F3820
Ultrasonic Atomizer Flash MCU
HT45F3820
Revision: V1.11 Date: April 11, 2017



Holtek Semiconductor HT45F3820
HT45F3820
Ultrasonic Atomizer Flash MCU
Table of Contents
Features............................................................................................................. 6
CPU Features.......................................................................................................................... 6
Peripheral Features.................................................................................................................. 6
General Description ......................................................................................... 7
Block Diagram................................................................................................... 8
Pin Assignment................................................................................................. 8
Pin Descriptions............................................................................................... 9
Absolute Maximum Ratings........................................................................... 10
D.C. Characteristics........................................................................................ 10
A.C. Characteristics........................................................................................ 12
LVD & LVR Electrical Characteristics........................................................... 13
Over Current / Voltage Protection Electrical Characteristics..................... 14
Power on Reset Electrical Characteristics................................................... 15
System Architecture....................................................................................... 15
Clocking and Pipelining.......................................................................................................... 15
Program Counter.................................................................................................................... 16
Stack...................................................................................................................................... 17
Arithmetic and Logic Unit – ALU............................................................................................ 17
Flash Program Memory.................................................................................. 18
Structure................................................................................................................................. 18
Special Vectors...................................................................................................................... 18
Look-up Table......................................................................................................................... 18
Table Program Example......................................................................................................... 19
In Circuit Programming.......................................................................................................... 20
On-Chip Debug Support – OCDS.......................................................................................... 20
RAM Data Memory.......................................................................................... 21
Structure................................................................................................................................. 21
General Purpose Data Memory............................................................................................. 21
Special Purpose Data Memory.............................................................................................. 22
Special Function Register Description......................................................... 23
Indirect Addressing Registers – IAR0, IAR1.......................................................................... 23
Memory Pointers – MP0, MP1............................................................................................... 23
Bank Pointer – BP.................................................................................................................. 24
Accumulator – ACC................................................................................................................ 24
Program Counter Low Register – PCL................................................................................... 24
Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 25
Status Register – STATUS..................................................................................................... 25
Rev. 1.11
2 April 11, 2017



Holtek Semiconductor HT45F3820
HT45F3820
Ultrasonic Atomizer Flash MCU
EEPROM Data Memory................................................................................... 27
EEPROM Data Memory Structure......................................................................................... 27
EEPROM Registers............................................................................................................... 27
Reading Data from the EEPROM ......................................................................................... 29
Writing Data to the EEPROM................................................................................................. 29
Write Protection...................................................................................................................... 29
EEPROM Interrupt................................................................................................................. 29
Programming Considerations................................................................................................. 30
Oscillators....................................................................................................... 31
Oscillator Overview................................................................................................................ 31
System Clock Configurations................................................................................................. 31
Internal RC Oscillator – HIRC................................................................................................ 32
Internal 32kHz Oscillator – LIRC............................................................................................ 32
Operating Modes and System Clocks.......................................................... 33
System Clocks....................................................................................................................... 33
System Operating Modes....................................................................................................... 34
Control Registers................................................................................................................... 35
Operating Mode Switching .................................................................................................... 37
Standby Current Considerations............................................................................................ 41
Wake-up................................................................................................................................. 41
Watchdog Timer.............................................................................................. 42
Watchdog Timer Clock Source............................................................................................... 42
Watchdog Timer Control Register.......................................................................................... 42
Watchdog Timer Operation.................................................................................................... 43
Reset and Initialisation................................................................................... 45
Reset Functions..................................................................................................................... 45
Reset Initial Conditions.......................................................................................................... 47
Input/Output Ports.......................................................................................... 49
Pull-high Resistors................................................................................................................. 50
Port A Wake-up...................................................................................................................... 50
I/O Port Control Registers...................................................................................................... 51
I/O Port Source Current Control............................................................................................. 51
I/O Port Output Slew Rate Control......................................................................................... 52
Pin-shared Function............................................................................................................... 52
I/O Pin Structures................................................................................................................... 54
Programming Considerations................................................................................................. 54
Timer Modules – TM....................................................................................... 55
Introduction............................................................................................................................ 55
TM Operation......................................................................................................................... 55
TM Clock Source.................................................................................................................... 55
TM Interrupts.......................................................................................................................... 56
TM External Pins.................................................................................................................... 56
TM Input/Output Pin Control Register.................................................................................... 56
Programming Considerations................................................................................................. 57
Rev. 1.11
3 April 11, 2017







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