Flash MCU. HT45FH24A Datasheet

HT45FH24A MCU. Datasheet pdf. Equivalent

HT45FH24A Datasheet
Recommendation HT45FH24A Datasheet
Part HT45FH24A
Description Smoke Detector Flash MCU
Feature HT45FH24A; Smoke Detector Flash MCU with Power Line Transceiver HT45FH23A/HT45FH24A Revision: V1.00 Date: �N�o�.
Manufacture Holtek Semiconductor
Datasheet
Download HT45FH24A Datasheet




Holtek Semiconductor HT45FH24A
Smoke Detector Flash MCU with Power Line Transceiver
HT45FH23A/HT45FH24A
Revision: V1.00 Date: �N�o�ve��mb��e�r�1��4,���2�0�1�7



Holtek Semiconductor HT45FH24A
HT45FH23A/HT45FH24A
Smoke Detector Flash MCU with Power Line Transceiver
Table of Contents
Features.................................................................................................................. 7
MCU CPU Features....................................................................................................................... 7
MCU Peripheral Features.............................................................................................................. 8
Two Line Power Line Data Transceiver Features.......................................................................... 8
General Description............................................................................................... 9
Selection Table..................................................................................................... 10
Block Diagram...................................................................................................... 10
Pin Assignment.....................................................................................................11
Pin Description.....................................................................................................11
Unbonded MCU Pins................................................................................................................... 13
Internally Connected Pins............................................................................................................ 14
Absolute Maximum Ratings................................................................................ 14
D.C. Characteristics............................................................................................. 15
A.C. Characteristics............................................................................................. 17
OP Amplifier Electrical Characteristics............................................................. 18
Comparator Electrical Characteristics.............................................................. 18
LDO 2.4V............................................................................................................... 19
LDO 3.3V............................................................................................................... 19
Two Line Type Power Line Data Transceiver Characteristics ........................ 19
Power-on Reset Characteristics......................................................................... 20
System Architecture............................................................................................ 21
Clocking and Pipelining................................................................................................................ 21
Program Counter.......................................................................................................................... 22
Stack............................................................................................................................................ 23
Arithmetic and Logic Unit – ALU.................................................................................................. 23
Flash Program Memory....................................................................................... 24
Structure....................................................................................................................................... 24
Special Vectors............................................................................................................................ 24
Look-up Table............................................................................................................................... 25
Table Program Example............................................................................................................... 26
In Circuit Programming................................................................................................................ 27
RAM Data Memory............................................................................................... 28
Structure....................................................................................................................................... 29
Special Function Registers................................................................................. 29
Indirect Addressing Registers – IAR0, IAR1................................................................................ 30
Memory Pointers – MP0, MP1..................................................................................................... 30
Bank Pointer – BP........................................................................................................................ 31
Accumulator – ACC...................................................................................................................... 31
Program Counter Low Register – PCL......................................................................................... 32
Rev. 1.00
2 November 14, 2017



Holtek Semiconductor HT45FH24A
HT45FH23A/HT45FH24A
Smoke Detector Flash MCU with Power Line Transceiver
Look-up Table Registers – TBLP, TBHP, TBLH............................................................................ 32
Status Register – STATUS........................................................................................................... 32
EEPROM Data Memory........................................................................................ 34
EEPROM Data Memory Structure............................................................................................... 34
EEPROM Registers..................................................................................................................... 34
Reading Data from the EEPROM................................................................................................ 36
Writing Data to the EEPROM....................................................................................................... 36
Write Protection............................................................................................................................ 36
EEPROM Interrupt....................................................................................................................... 36
Programming Considerations....................................................................................................... 37
Programming Examples............................................................................................................... 37
Oscillators............................................................................................................ 38
Oscillator Overview...................................................................................................................... 38
System Clock Configurations....................................................................................................... 38
External Crystal/Ceramic Oscillator – HXT.................................................................................. 39
External Oscillator – EC............................................................................................................... 40
Internal RC Oscillator – HIRC...................................................................................................... 40
External 32.768kHz Crystal Oscillator – LXT............................................................................... 40
LXT Oscillator Low Power Function............................................................................................. 41
Internal 32kHz Oscillator – LIRC.................................................................................................. 42
Supplementary Oscillators........................................................................................................... 42
Operating Modes and System Clocks............................................................... 42
System Clocks............................................................................................................................. 42
System Operation Modes............................................................................................................. 43
Control Register........................................................................................................................... 45
Fast Wake-up............................................................................................................................... 46
Operating Mode Switching........................................................................................................... 47
Standby Current Considerations.................................................................................................. 52
Wake-up....................................................................................................................................... 53
Programming Considerations....................................................................................................... 53
Watchdog Timer................................................................................................... 54
Watchdog Timer Clock Source..................................................................................................... 54
Watchdog Timer Control Register................................................................................................ 54
Watchdog Timer Operation.......................................................................................................... 55
Reset and Initialisation........................................................................................ 56
Reset Functions........................................................................................................................... 56
Reset Initial Conditions................................................................................................................ 59
Input/Output Ports............................................................................................... 62
Pull-high Resistors....................................................................................................................... 62
Port A Wake-up............................................................................................................................ 62
I/O Port Control Registers............................................................................................................ 62
I/O Pin Structures......................................................................................................................... 64
Programming Considerations....................................................................................................... 64
Rev. 1.00
3 November 14, 2017







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