Flash MCU. HT66F488 Datasheet

HT66F488 MCU. Datasheet pdf. Equivalent

HT66F488 Datasheet
Recommendation HT66F488 Datasheet
Part HT66F488
Description A/D Flash MCU
Feature HT66F488; A/D Flash MCU with EEPROM HT66F488/HT66F489 Revision: V1.21 Date: �N�o�ve��mb��e�r��09�,��2��0�1�7 .
Manufacture Holtek Semiconductor
Datasheet
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Holtek Semiconductor HT66F488
A/D Flash MCU with EEPROM
HT66F488/HT66F489
Revision: V1.21 Date: �N�o�ve��mb��e�r��09�,��2��0�1�7



Holtek Semiconductor HT66F488
HT66F488/HT66F489
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............................................................................................. 10
Absolute Maximum Ratings........................................................................... 13
D.C. Characteristics........................................................................................ 13
A.C. Characteristics........................................................................................ 15
LVR & LVD Characteristics............................................................................ 16
A/D Converter Electrical Characteristics...................................................... 17
Power on Reset Electrical Characteristics................................................... 17
System Architecture....................................................................................... 18
Clocking and Pipelining.......................................................................................................... 18
Program Counter.................................................................................................................... 19
Stack...................................................................................................................................... 20
Arithmetic and Logic Unit – ALU............................................................................................ 20
Flash Program Memory.................................................................................. 21
Structure................................................................................................................................. 21
Special Vectors...................................................................................................................... 21
Look-up Table......................................................................................................................... 22
Table Program Example......................................................................................................... 22
In Circuit Programming.......................................................................................................... 23
On-Chip Debug Support – OCDS.......................................................................................... 24
RAM Data Memory.......................................................................................... 25
Structure................................................................................................................................. 25
General Purpose Data Memory ............................................................................................ 25
Special Purpose Data Memory ............................................................................................. 26
Special Function Register Description......................................................... 27
Indirect Addressing Register – IAR0, IAR1, IAR2.................................................................. 27
Memory Pointers – MP0, MP1L, MP1H, MP2L, MP2H.......................................................... 27
Accumulator – ACC................................................................................................................ 29
Program Counter Low Register – PCL................................................................................... 29
Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 29
Status Register – STATUS .................................................................................................... 29
Rev. 1.21
2 November 09, 2017



Holtek Semiconductor HT66F488
HT66F488/HT66F489
A/D Flash MCU with EEPROM
EEPROM Data Memory................................................................................... 31
EEPROM Data Memory Structure......................................................................................... 31
EEPROM Registers............................................................................................................... 31
Reading Data from the EEPROM ......................................................................................... 33
Writing Data to the EEPROM................................................................................................. 33
Write Protection...................................................................................................................... 33
EEPROM Interrupt................................................................................................................. 33
Programming Considerations................................................................................................. 34
Oscillator......................................................................................................... 35
Oscillator Overview................................................................................................................ 35
System Clock Configurations................................................................................................. 35
External Crystal/Ceramic Oscillator – HXT............................................................................ 36
Internal RC Oscillator – HIRC................................................................................................ 37
External 32.768kHz Crystal Oscillator – LXT......................................................................... 37
Internal 32kHz Oscillator – LIRC............................................................................................ 38
Supplementary Oscillator....................................................................................................... 38
Operating Modes and System Clocks.......................................................... 39
System Clocks....................................................................................................................... 39
System Operation Modes....................................................................................................... 40
Control Register..................................................................................................................... 41
Fast Wake-up......................................................................................................................... 42
Operating Mode Switching .................................................................................................... 43
Standby Current Considerations............................................................................................ 45
Wake-up................................................................................................................................. 45
Programming Considerations................................................................................................. 46
Watchdog Timer.............................................................................................. 46
Watchdog Timer Clock Source............................................................................................... 46
Watchdog Timer Control Register.......................................................................................... 46
Watchdog Timer Operation.................................................................................................... 48
Reset and Initialisation................................................................................... 49
Reset Functions..................................................................................................................... 49
Reset Initial Conditions.......................................................................................................... 51
Input/Output Ports.......................................................................................... 54
Pull-high Resistors................................................................................................................. 55
Port A Wake-up...................................................................................................................... 55
I/O Port Control Registers...................................................................................................... 55
Pin-shared Functions............................................................................................................. 55
I/O Pin Structures................................................................................................................... 55
I/O Port source current selection............................................................................................ 57
Programming Considerations................................................................................................. 59
Rev. 1.21
3 November 09, 2017





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