Flash MCU. HT45F77 Datasheet

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HT45F77 Datasheet
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Part HT45F77
Description Body Fat Scale Flash MCU
Feature HT45F77; Body Fat Scale Flash MCU HT45F77 Revision: V1.20 Date: �D�e�c�e�mb��e�r�1��4,��2�0�1��6 HT45F77 Bod.
Manufacture Holtek Semiconductor
Datasheet
Download HT45F77 Datasheet




Holtek Semiconductor HT45F77
Body Fat Scale Flash MCU
HT45F77
Revision: V1.20 Date: �D�e�c�e�mb��e�r�1��4,��2�0�1��6



Holtek Semiconductor HT45F77
HT45F77
Body Fat Scale Flash MCU
Table of Contents
Features............................................................................................................. 7
CPU Features.......................................................................................................................... 7
Peripheral Features.................................................................................................................. 7
General Description.......................................................................................... 8
Block Diagram................................................................................................... 8
Pin Assignment................................................................................................. 9
Pin Description............................................................................................... 10
Absolute Maximum Ratings........................................................................... 13
D.C. Characteristics........................................................................................ 13
A.C. Characteristics........................................................................................ 16
LDO + PGA + ADC + VCM Electrical Characteristics................................... 17
Effective Number of Bits (ENOB)........................................................................................... 18
Operational Amplifier Electrical Characteristics (Body Fat Circuit).......... 19
LCD D.C. Characteristics............................................................................... 19
Power-on Reset Characteristics.................................................................... 19
System Architecture....................................................................................... 20
Clocking and Pipelining.......................................................................................................... 20
Program Counter.................................................................................................................... 21
Stack...................................................................................................................................... 22
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
In Application Programming – IAP......................................................................................... 26
RAM Data Memory.......................................................................................... 33
Structure ................................................................................................................................ 33
General Purpose Data Memory............................................................................................. 33
Special Purpose Data Memory.............................................................................................. 34
Special Function Register Description......................................................... 35
Indirect Addressing Registers – IAR0, IAR1, IAR2................................................................ 35
Memory Pointers – MP0, MP1L, MP1H, MP2L, MP2H.......................................................... 35
Accumulator – ACC................................................................................................................ 37
Program Counter Low Register – PCL................................................................................... 37
Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 37
Status Register – STATUS .................................................................................................... 37
Rev. 1.20
2 December 14, 2016



Holtek Semiconductor HT45F77
HT45F77
Body Fat Scale Flash MCU
EEPROM Data Memory................................................................................... 39
EEPROM Data Memory Structure......................................................................................... 39
EEPROM Registers............................................................................................................... 39
Reading Data from the EEPROM.......................................................................................... 41
Writing Data to the EEPROM................................................................................................. 41
Write Protection...................................................................................................................... 41
EEPROM Interrupt................................................................................................................. 41
Programming Considerations................................................................................................. 42
Oscillators....................................................................................................... 43
Oscillator Overview ............................................................................................................... 43
System Clock Configurations................................................................................................. 43
External Crystal/Ceramic Oscillator – HXT............................................................................ 44
Internal RC Oscillator – HIRC................................................................................................ 45
Internal 32kHz Oscillator – LIRC............................................................................................ 45
External 32.768kHz Crystal Oscillator – LXT......................................................................... 45
Supplementary Oscillators..................................................................................................... 47
Operating Modes and System Clocks.......................................................... 47
System Clocks....................................................................................................................... 47
System Operation Modes ...................................................................................................... 49
Control Register..................................................................................................................... 50
Fast Wake-up......................................................................................................................... 52
Operating Mode Switching .................................................................................................... 53
Standby Current Considerations ........................................................................................... 57
Wake-up ................................................................................................................................ 58
Programming Considerations................................................................................................. 58
Watchdog Timer.............................................................................................. 59
Watchdog Timer Clock Source............................................................................................... 59
Watchdog Timer Control Register.......................................................................................... 59
Watchdog Timer Operation.................................................................................................... 60
Reset and Initialisation .................................................................................. 62
Reset Functions..................................................................................................................... 62
Reset Initial Conditions ......................................................................................................... 65
Input/Output Ports ......................................................................................... 69
I/O Register List..................................................................................................................... 69
Pull-high Resistors................................................................................................................. 69
Port A Wake-up...................................................................................................................... 71
I/O Port Control Registers...................................................................................................... 71
I/O Pin Structures................................................................................................................... 73
Programming Considerations ................................................................................................ 73
Rev. 1.20
3 December 14, 2016







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