ASSP MCU. HT45R2K-A Datasheet

HT45R2K-A MCU. Datasheet pdf. Equivalent

HT45R2K-A Datasheet
Recommendation HT45R2K-A Datasheet
Part HT45R2K-A
Description Dual Slope 16K/8K/4K ASSP MCU
Feature HT45R2K-A; Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale HT45R2K-C HT45R2K-B HT45R2K-A Revision: 1.40 Date: .
Manufacture Holtek Semiconductor
Datasheet
Download HT45R2K-A Datasheet




Holtek Semiconductor HT45R2K-A
Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale
HT45R2K-C
HT45R2K-B
HT45R2K-A
Revision: 1.40 Date: �M�a�r�c�h�1��2,���2�0�1�5



Holtek Semiconductor HT45R2K-A
HT45R2K-C/-B/-A
Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale
Table of Contents
Features.......................................................................................................................... 5
General Description ...................................................................................................... 6
Selection Table............................................................................................................... 6
Block Diagram................................................................................................................ 6
Pin Assignment.............................................................................................................. 7
Pin Description............................................................................................................... 7
Absolute Maximum Ratings........................................................................................ 10
D.C. Characteristics..................................................................................................... 10
A.C. Characteristics..................................................................................................... 12
Operational Amplifier Electrical Characteristics....................................................... 13
Instrumentation Amplifier Electrical Characteristics................................................ 13
Power-on Reset Characteristics................................................................................. 13
System Architecture..................................................................................................... 14
Clocking and Pipelining........................................................................................................... 14
Program Counter – PC ........................................................................................................... 15
Stack....................................................................................................................................... 16
Arithmetic and Logic Unit – ALU............................................................................................. 16
Program Memory.......................................................................................................... 17
Structure.................................................................................................................................. 17
Special Vectors....................................................................................................................... 17
Look-up Table.......................................................................................................................... 18
Table Program Example.......................................................................................................... 19
Data Memory................................................................................................................. 20
Structure.................................................................................................................................. 20
Special Purpose Data Memory............................................................................................... 22
Special Function Registers......................................................................................... 22
Indirect Addressing Registers – IAR0, IAR1........................................................................... 22
Memory Pointers – MP0, MP1................................................................................................ 22
Accumulator – ACC................................................................................................................. 23
Program Counter Low Register – PCL.................................................................................... 23
Bank Pointer – BP................................................................................................................... 24
Status Register – STATUS...................................................................................................... 24
System Control Registers – CTRL0, CTRL1........................................................................... 25
Rev. 1.40
2 March 12, 2015



Holtek Semiconductor HT45R2K-A
HT45R2K-C/-B/-A
Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale
Oscillator Configuration.............................................................................................. 27
External Crystal/Ceramic Oscillator – HXT............................................................................. 28
External RC Oscillator – ERC................................................................................................. 28
Internal RC Oscillator – HIRC................................................................................................. 29
External 32.768kHz Crystal Oscillator – LXT.......................................................................... 29
LXT Oscillator Low Power Function........................................................................................ 30
Internal 12kHz Oscillator – LIRC............................................................................................. 30
Watchdog Timer – WDT............................................................................................... 30
Watchdog Timer Clock Source................................................................................................ 30
Watchdog Timer Operation..................................................................................................... 30
Operating Modes.......................................................................................................... 34
Power Down Mode.................................................................................................................. 34
Reset and Initialisation................................................................................................ 36
Reset Functions...................................................................................................................... 36
Reset Initial Conditions........................................................................................................... 38
Input/Output Ports........................................................................................................ 41
Pull-high Resistors.................................................................................................................. 41
Port A Wake-up ...................................................................................................................... 42
I/O Port Control Registers....................................................................................................... 42
Pin-shared Functions.............................................................................................................. 43
I/O Pin Structures.................................................................................................................... 44
Programming Considerations.................................................................................................. 45
Timer/Event Counters.................................................................................................. 45
Timer Mode............................................................................................................................. 50
Event Counter Mode............................................................................................................... 50
Pulse Width Measurement Mode............................................................................................ 51
Prescaler................................................................................................................................. 52
Buzzer..................................................................................................................................... 52
I/O Interfacing.......................................................................................................................... 54
Programming Considerations.................................................................................................. 54
Timer Program Example......................................................................................................... 55
Vibration Sensor Amplifier.......................................................................................... 56
Touch Key Module........................................................................................................ 56
Touch Key Structure................................................................................................................ 56
Touch Key Register Definition................................................................................................. 56
Touch Key Operation............................................................................................................... 62
Touch Key Interrupts............................................................................................................... 63
Programming Considerations.................................................................................................. 63
Charge Pump and Voltage Regulator......................................................................... 63
Operation................................................................................................................................ 63
Dual Slope A/D Converter ........................................................................................... 65
Dual Slope Anolog Digital Convertor Operation...................................................................... 67
Rev. 1.40
3 March 12, 2015







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