Flash MCU. HT66F0185 Datasheet

HT66F0185 MCU. Datasheet pdf. Equivalent

HT66F0185 Datasheet
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Part HT66F0185
Description A/D Flash MCU
Feature HT66F0185; A/D Flash MCU with EEPROM HT66F0175/HT66F0185 Revision: V1.50 Date: �Au�g�u��s�t��28�,���2�0�1�7 HT.
Manufacture Holtek Semiconductor
Datasheet
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Holtek Semiconductor HT66F0185
A/D Flash MCU with EEPROM
HT66F0175/HT66F0185
Revision: V1.50 Date: �Au�g�u��s�t��28�,���2�0�1�7



Holtek Semiconductor HT66F0185
HT66F0175/HT66F0185
A/D Flash MCU with EEPROM
Table of Contents
Features................................................................................................................. 7
CPU Features...............................................................................................................................7
Peripheral Features.......................................................................................................................7
General Description.............................................................................................. 8
Selection Table...................................................................................................... 8
Block Diagram....................................................................................................... 9
Pin Assignment..................................................................................................... 9
Pin Descriptions................................................................................................. 11
Absolute Maximum Ratings............................................................................... 17
D.C. Characteristics............................................................................................ 17
A.C. Characteristics............................................................................................ 19
HIRC Electrical Characteristics......................................................................... 20
A/D Converter Electrical Characteristics.......................................................... 21
LVD/LVR Electrical Characteristics................................................................... 22
Comparator Electrical Characteristics............................................................. 22
Software Controlled LCD Driver Electrical Characteristics............................ 23
Power-on Reset Characteristics........................................................................ 23
System Architecture........................................................................................... 24
Clocking and Pipelining...............................................................................................................24
Program Counter.........................................................................................................................25
Stack...........................................................................................................................................26
Arithmetic and Logic Unit – ALU.................................................................................................26
Flash Program Memory...................................................................................... 27
Structure......................................................................................................................................27
Special Vectors...........................................................................................................................27
Look-up Table..............................................................................................................................28
Table Program Example..............................................................................................................28
In Circuit Programming – ICP.....................................................................................................29
On-Chip Debug Support – OCDS...............................................................................................30
Data Memory....................................................................................................... 31
Structure......................................................................................................................................31
Special Function Register Description............................................................. 33
Indirect Addressing Registers – IAR0, IAR1...............................................................................33
Memory Pointers – MP0, MP1....................................................................................................33
Bank Pointer – BP.......................................................................................................................34
Accumulator – ACC.....................................................................................................................34
Program Counter Low Register – PCL........................................................................................34
Look-up Table Registers – TBLP, TBHP, TBLH...........................................................................34
Status Register – STATUS..........................................................................................................35
Rev. 1.50
2 August 28, 2017



Holtek Semiconductor HT66F0185
HT66F0175/HT66F0185
A/D Flash MCU with EEPROM
EEPROM Data Memory....................................................................................... 37
EEPROM Data Memory Structure..............................................................................................37
EEPROM Registers....................................................................................................................37
Reading Data from the EEPROM...............................................................................................39
Writing Data to the EEPROM......................................................................................................39
Write Protection...........................................................................................................................39
EEPROM Interrupt......................................................................................................................39
Programming Considerations......................................................................................................40
Oscillator............................................................................................................. 41
Oscillator Overview.....................................................................................................................41
System Clock Configurations......................................................................................................41
External Crystal/Ceramic Oscillator – HXT.................................................................................42
Internal High Speed RC Oscillator – HIRC.................................................................................43
External 32.768 kHz Crystal Oscillator – LXT.............................................................................43
Internal 32kHz Oscillator – LIRC.................................................................................................44
Supplementary Oscillators..........................................................................................................44
Operating Modes and System Clocks.............................................................. 45
System Clocks............................................................................................................................45
System Operation Modes............................................................................................................46
Control Registers........................................................................................................................47
Fast Wake-up..............................................................................................................................49
Operating Mode Switching..........................................................................................................50
Standby Current Considerations.................................................................................................54
Wake-up......................................................................................................................................54
Programming Considerations......................................................................................................55
Watchdog Timer.................................................................................................. 55
Watchdog Timer Clock Source....................................................................................................55
Watchdog Timer Control Register...............................................................................................55
Watchdog Timer Operation.........................................................................................................57
Reset and Initialisation....................................................................................... 58
Reset Functions..........................................................................................................................58
Reset Initial Conditions...............................................................................................................60
Input/Output Ports.............................................................................................. 64
Pull-high Resistors......................................................................................................................65
Port A Wake-up...........................................................................................................................65
I/O Port Control Registers...........................................................................................................66
I/O Port Source Current Control..................................................................................................66
Pin-remapping Functions............................................................................................................68
I/O Pin Structures........................................................................................................................69
Programming Considerations......................................................................................................70
Rev. 1.50
3 August 28, 2017





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