Flash MCU. HT66F0176 Datasheet

HT66F0176 MCU. Datasheet pdf. Equivalent

HT66F0176 Datasheet
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Part HT66F0176
Description A/D Flash MCU
Feature HT66F0176; A/D Flash MCU with EEPROM HT66F0176 Revision: V1.20 Date: �Au�g�u��s�t�2��8,��2�0�1��7 HT66F0176 A/.
Manufacture Holtek Semiconductor
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Holtek Semiconductor HT66F0176
A/D Flash MCU with EEPROM
HT66F0176
Revision: V1.20 Date: �Au�g�u��s�t�2��8,��2�0�1��7



Holtek Semiconductor HT66F0176
HT66F0176
A/D Flash MCU with EEPROM
Table of Contents
Features............................................................................................................. 6
CPU Features.......................................................................................................................... 6
Peripheral Features.................................................................................................................. 6
General Description.......................................................................................... 7
Block Diagram................................................................................................... 7
Pin Assignment................................................................................................. 8
Pin Description................................................................................................. 9
Absolute Maximum Ratings........................................................................... 12
D.C. Characteristics........................................................................................ 12
Operating Voltage Characteristics ......................................................................................... 12
Standby Current Characteristics............................................................................................ 13
Operating Current Characteristics.......................................................................................... 14
A.C. Characteristics........................................................................................ 15
High Speed Internal Oscillator – HIRC – Frequency Accuracy.............................................. 15
Low Speed Internal Oscillator Characteristics – LIRC........................................................... 15
Operating Frequency Characteristic Curves.......................................................................... 16
System Start Up Time Characteristics .................................................................................. 16
Input/Output Characteristics......................................................................... 17
Memory Characteristics................................................................................. 17
A/D Converter Electrical Characteristics...................................................... 18
Reference Voltage Characteristics................................................................ 18
LVD/LVR Electrical Characteristics............................................................... 18
Software Controlled LCD Driver Electrical Characteristics........................ 19
Power-on Reset Characteristics.................................................................... 19
System Architecture....................................................................................... 20
Clocking and Pipelining.......................................................................................................... 20
Program Counter.................................................................................................................... 21
Stack...................................................................................................................................... 21
Arithmetic and Logic Unit – ALU............................................................................................ 22
Flash Program Memory.................................................................................. 23
Structure................................................................................................................................. 23
Special Vectors...................................................................................................................... 23
Look-up Table......................................................................................................................... 23
Table Program Example......................................................................................................... 24
In Circuit Programming – ICP................................................................................................ 25
On-Chip Debug Support – OCDS.......................................................................................... 26
Data Memory................................................................................................... 27
Structure................................................................................................................................. 27
Rev. 1.20
2 August 28, 2017



Holtek Semiconductor HT66F0176
HT66F0176
A/D Flash MCU with EEPROM
Special Function Register Description......................................................... 29
Indirect Addressing Registers – IAR0, IAR1.......................................................................... 29
Memory Pointers – MP0, MP1............................................................................................... 29
Bank Pointer – BP.................................................................................................................. 30
Accumulator – ACC................................................................................................................ 30
Program Counter Low Register – PCL................................................................................... 30
Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 30
Status Register – STATUS..................................................................................................... 31
EEPROM Data Memory................................................................................... 33
EEPROM Data Memory Structure......................................................................................... 33
EEPROM Registers............................................................................................................... 33
Reading Data from the EEPROM.......................................................................................... 35
Writing Data to the EEPROM................................................................................................. 35
Write Protection...................................................................................................................... 35
EEPROM Interrupt................................................................................................................. 35
Programming Considerations................................................................................................. 36
Oscillators....................................................................................................... 37
Oscillator Overview................................................................................................................ 37
System Clock Configurations................................................................................................. 37
External Crystal/Ceramic Oscillator – HXT............................................................................ 38
Internal High Speed RC Oscillator – HIRC............................................................................ 39
External 32.768 kHz Crystal Oscillator – LXT........................................................................ 39
Internal 32kHz Oscillator – LIRC............................................................................................ 40
Supplementary Oscillators..................................................................................................... 40
Operating Modes and System Clocks.......................................................... 41
System Clocks....................................................................................................................... 41
System Operation Modes ...................................................................................................... 42
Control Registers................................................................................................................... 43
Fast Wake-up......................................................................................................................... 45
Operating Mode Switching..................................................................................................... 46
Standby Current Considerations............................................................................................ 50
Wake-up................................................................................................................................. 50
Programming Considerations................................................................................................. 51
Watchdog Timer.............................................................................................. 52
Watchdog Timer Clock Source............................................................................................... 52
Watchdog Timer Control Register.......................................................................................... 52
Watchdog Timer Operation.................................................................................................... 53
Reset and Initialisation................................................................................... 54
Reset Functions..................................................................................................................... 54
Reset Initial Conditions.......................................................................................................... 56
Input/Output Ports.......................................................................................... 59
Pull-high Resistors................................................................................................................. 59
Port A Wake-up...................................................................................................................... 60
I/O Port Control Registers...................................................................................................... 60
Rev. 1.20
3 August 28, 2017





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