Flash MCU. HT66F008 Datasheet

HT66F008 MCU. Datasheet pdf. Equivalent

HT66F008 Datasheet
Recommendation HT66F008 Datasheet
Part HT66F008
Description Cost-Effective A/D Flash MCU
Feature HT66F008; Cost-Effective A/D Flash MCU with EEPROM HT66F007/HT66F008 Revision: V1.50 Date: �Au�g�u��s�t��29�,�.
Manufacture Holtek Semiconductor
Datasheet
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Holtek Semiconductor HT66F008
Cost-Effective A/D Flash MCU with EEPROM
HT66F007/HT66F008
Revision: V1.50 Date: �Au�g�u��s�t��29�,���2�0�1�7



Holtek Semiconductor HT66F008
HT66F007/HT66F008
Cost-Effective A/D Flash MCU with EEPROM
Table of Contents
Features............................................................................................................. 6
CPU Features.......................................................................................................................... 6
Peripheral Features.................................................................................................................. 6
General Description ......................................................................................... 7
Block Diagram................................................................................................... 7
Selection Table.................................................................................................. 8
Pin Assignment................................................................................................. 8
Pin Descriptions............................................................................................... 9
Absolute Maximum Ratings........................................................................... 10
D.C. Characteristics........................................................................................ 10
A.C. Characteristics........................................................................................ 12
A/D Converter Electrical Characteristics...................................................... 14
Comparator Electrical Characteristics......................................................... 15
Power on Reset Electrical Characteristics................................................... 15
System Architecture....................................................................................... 15
Clocking and Pipelining.......................................................................................................... 16
Program Counter.................................................................................................................... 17
Stack...................................................................................................................................... 17
Arithmetic and Logic Unit – ALU............................................................................................ 18
Flash Program Memory.................................................................................. 18
Structure................................................................................................................................. 18
Special Vectors...................................................................................................................... 19
Look-up Table......................................................................................................................... 19
Table Program Example......................................................................................................... 19
In Circuit Programming.......................................................................................................... 20
On-Chip Debug Support – OCDS.......................................................................................... 21
RAM Data Memory.......................................................................................... 22
Structure................................................................................................................................. 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...................................................................... 24
Status Register – STATUS..................................................................................................... 25
EEPROM Data Memory................................................................................... 26
EEPROM Data Memory Structure......................................................................................... 26
EEPROM Registers............................................................................................................... 26
Rev. 1.50
2 August 29, 2017



Holtek Semiconductor HT66F008
HT66F007/HT66F008
Cost-Effective A/D Flash MCU with EEPROM
Reading Data from the EEPROM ......................................................................................... 29
Writing Data to the EEPROM................................................................................................. 29
Write Protection...................................................................................................................... 29
EEPROM Interrupt................................................................................................................. 29
Programming Considerations................................................................................................. 30
Programming Examples......................................................................................................... 30
Oscillators....................................................................................................... 31
Oscillator Overview................................................................................................................ 31
System Clock Configurations................................................................................................. 31
External Crystal/Ceramic Oscillator – HXT............................................................................ 32
Internal RC Oscillator – HIRC................................................................................................ 33
Internal 32kHz Oscillator – LIRC............................................................................................ 33
Supplementary Oscillator....................................................................................................... 33
Operating Modes and System Clocks.......................................................... 33
System Clocks....................................................................................................................... 33
System Operation Modes....................................................................................................... 35
Control Register..................................................................................................................... 36
Fast Wake-up......................................................................................................................... 37
Operating Mode Switching .................................................................................................... 38
Standby Current Considerations............................................................................................ 42
Wake-up................................................................................................................................. 42
Programming Considerations................................................................................................. 43
Watchdog Timer.............................................................................................. 44
Watchdog Timer Clock Source............................................................................................... 44
Watchdog Timer Control Register.......................................................................................... 44
Watchdog Timer Operation.................................................................................................... 45
Reset and Initialisation................................................................................... 46
Reset Functions..................................................................................................................... 46
Reset Initial Conditions.......................................................................................................... 49
Input/Output Ports.......................................................................................... 51
Pull-high Resistors................................................................................................................. 51
Port A Wake-up...................................................................................................................... 52
I/O Port Control Registers...................................................................................................... 52
Special Pin Control................................................................................................................. 53
Pin-remapping Functions....................................................................................................... 53
I/O Pin Structures................................................................................................................... 55
Programming Considerations................................................................................................. 56
Timer Modules – TM....................................................................................... 56
Introduction............................................................................................................................ 56
TM Operation......................................................................................................................... 57
TM Clock Source.................................................................................................................... 57
TM Interrupts.......................................................................................................................... 57
TM External Pins.................................................................................................................... 57
Rev. 1.50
3 August 29, 2017





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