Flash MCU. HT66F26D Datasheet

HT66F26D MCU. Datasheet pdf. Equivalent

HT66F26D Datasheet
Recommendation HT66F26D Datasheet
Part HT66F26D
Description Enhanced A/D Flash MCU
Feature HT66F26D; Enhanced A/D Flash MCU with High Current LED Driver HT66F24D/HT66F25D/HT66F26D Revision: V1.50 Date:.
Manufacture Holtek Semiconductor
Datasheet
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Holtek Semiconductor HT66F26D
Enhanced A/D Flash MCU with High Current LED Driver
HT66F24D/HT66F25D/HT66F26D
Revision: V1.50 Date: �Au�g�u��s�t��24�,���2�0�1�7



Holtek Semiconductor HT66F26D
Enhanced A/D Flash MCU with High Current LED Driver
HT66F24D/HT66F25D/HT66F26D
Table of Contents
Features............................................................................................................. 6
CPU Features.......................................................................................................................... 6
Peripheral Features.................................................................................................................. 6
General Description.......................................................................................... 7
Selection Table.................................................................................................. 7
Block Diagram................................................................................................... 8
Pin Assignment................................................................................................. 9
Pin Descriptions..............................................................................................11
HT66F24D...............................................................................................................................11
HT66F25D.............................................................................................................................. 12
HT66F26D.............................................................................................................................. 13
Absolute Maximum Ratings........................................................................... 14
D.C. Characteristics........................................................................................ 14
A.C. Characteristics........................................................................................ 16
LVD and LVR Electrical Characteristics........................................................ 17
A/D Converter Electrical Characteristics...................................................... 18
Power-on Reset Characteristics.................................................................... 19
System Architecture....................................................................................... 19
Clocking and Pipelining.......................................................................................................... 19
Program Counter.................................................................................................................... 20
Stack...................................................................................................................................... 21
Arithmetic and Logic Unit – ALU............................................................................................ 22
Flash Program Memory.................................................................................. 22
Structure................................................................................................................................. 22
Special Vectors...................................................................................................................... 23
Look-up Table......................................................................................................................... 23
Table Program Example......................................................................................................... 23
In Circuit Programming.......................................................................................................... 24
On-Chip Debug Support – OCDS.......................................................................................... 25
RAM Data Memory.......................................................................................... 26
Structure................................................................................................................................. 26
Special Function Register Description......................................................... 31
Indirect Addressing Registers – IAR0, IAR1.......................................................................... 31
Memory Pointers – MP0, MP1............................................................................................... 31
Bank Pointer – BP.................................................................................................................. 32
Accumulator – ACC................................................................................................................ 32
Program Counter Low Register – PCL................................................................................... 33
Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 33
Status Register – STATUS..................................................................................................... 33
Rev. 1.50
2 August 24, 2017



Holtek Semiconductor HT66F26D
Enhanced A/D Flash MCU with High Current LED Driver
HT66F24D/HT66F25D/HT66F26D
EEPROM Data Memory................................................................................... 35
EEPROM Data Memory Structure......................................................................................... 35
EEPROM Registers............................................................................................................... 35
Reading Data from the EEPROM.......................................................................................... 37
Writing Data to the EEPROM................................................................................................. 37
Write Protection...................................................................................................................... 37
EEPROM Interrupt................................................................................................................. 37
Programming Considerations................................................................................................. 38
Oscillator......................................................................................................... 39
Oscillator Overview................................................................................................................ 39
System Clock Configurations................................................................................................. 39
External Crystal/Ceramic Oscillator – HXT............................................................................ 40
Internal High Speed RC Oscillator – HIRC............................................................................ 41
Internal 32kHz Oscillator – LIRC............................................................................................ 41
Supplementary Oscillator....................................................................................................... 41
Operating Modes and System Clocks.......................................................... 42
System Clocks....................................................................................................................... 42
System Operation Modes....................................................................................................... 43
Control Register..................................................................................................................... 44
Fast Wake-up......................................................................................................................... 46
Operating Mode Switching..................................................................................................... 47
Standby Current Considerations............................................................................................ 51
Wake-up................................................................................................................................. 51
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..................................................................................................................... 55
Reset Initial Conditions.......................................................................................................... 57
Input/Output Ports.......................................................................................... 64
I/O Resistor Lists.................................................................................................................... 64
Pull-high Resistors................................................................................................................. 65
Port A Wake-up...................................................................................................................... 66
Pin-remapping Functions....................................................................................................... 68
Timer Modules – TM....................................................................................... 70
Introduction............................................................................................................................ 70
TM Operation......................................................................................................................... 71
TM Clock Source.................................................................................................................... 71
TM Interrupts.......................................................................................................................... 71
TM External Pins.................................................................................................................... 72
TM Input/Output Pin Control Registers.................................................................................. 72
Programming Considerations................................................................................................. 79
Rev. 1.50
3 August 24, 2017





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