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HT45FH4J Datasheet(PDF) 3 Page - Holtek Semiconductor Inc |
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HT45FH4J Datasheet(HTML) 3 Page - Holtek Semiconductor Inc |
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3 / 129 page  Rev. 1.10 � De�e��e� 1�� �01� Rev. 1.10 3 De�e��e� 1�� �01� HT45FH4J Emergency Light Flash MCU HT45FH4J Emergency Light Flash MCU EEPROM Data Memory.................................................................................. 31 EEPROM Data Me�o�y St�u�tu�e ........................................................................................ 31 EEPROM Registe�s .............................................................................................................. 31 Reading Data f�o� the EEPROM ........................................................................................ 33 W�iting Data to the EEPROM................................................................................................ 33 W�ite P�ote�tion..................................................................................................................... 33 EEPROM Inte��upt ................................................................................................................ 33 P�og�a��ing Conside�ations................................................................................................ 3� Oscillator ........................................................................................................ 35 Os�illato� Ove�view ............................................................................................................... 35 System Clock Configurations................................................................................................ 35 Inte�nal RC Os�illato� – HIRC ............................................................................................... 3� Inte�nal 3�kHz Os�illato� – LIRC........................................................................................... 3� Operating Modes and System Clocks ......................................................... 36 Syste� Clo�ks ...................................................................................................................... 3� Syste� Ope�ation Modes...................................................................................................... 37 Cont�ol Registe� .................................................................................................................... 39 Ope�ating Mode Swit�hing ................................................................................................... �1 NORMAL Mode to SLOW Mode Swit�hing........................................................................... �1 SLOW Mode to NORMAL Mode Swit�hing .......................................................................... �� Ente�ing the SLEEP Mode .................................................................................................... �� Ente�ing the IDLE0 Mode...................................................................................................... �3 Ente�ing the IDLE1 Mode...................................................................................................... �3 Stand�y Cu��ent Conside�ations........................................................................................... �3 Wake-up................................................................................................................................ �� Watchdog Timer............................................................................................. 45 Wat�hdog Ti�e� Clo�k Sou��e.............................................................................................. �5 Wat�hdog Ti�e� Cont�ol Registe� ......................................................................................... �5 Wat�hdog Ti�e� Ope�ation ................................................................................................... �� Reset and Initialisation.................................................................................. 47 Reset Fun�tions .................................................................................................................... �7 Reset Initial Conditions ......................................................................................................... 50 Input/Output Ports......................................................................................... 53 Pull-high Resisto�s ................................................................................................................ 53 Po�t A Wake-up ..................................................................................................................... 5� I/O Po�t Cont�ol Registe�s..................................................................................................... 5� Pin-sha�ed Fun�tions ............................................................................................................ 55 Pin-sha�ed Fun�tion Sele�tion Registe�s.............................................................................. 55 I/O Pin St�u�tu�es.................................................................................................................. 5� P�og�a��ing Conside�ations................................................................................................ 57 |
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