HT45FH23A/HT45FH24A
Smoke Detector Flash MCU with Power Line Transceiver
Look-up Taꢁle Registeꢂs – TBLPꢄ TBHPꢄ TBLH........................................................................... 3ꢅ
Status Registeꢂ – STATUS.......................................................................................................... 3ꢅ
EEPROM Data Memory....................................................................................... 34
EEPROM Data Meꢀoꢂy Stꢂuctuꢂe .............................................................................................. 3ꢃ
EEPROM Registeꢂs .................................................................................................................... 3ꢃ
Reading Data fꢂoꢀ the EEPROM ............................................................................................... 36
Wꢂiting Data to the EEPROM...................................................................................................... 36
Wꢂite Pꢂotection........................................................................................................................... 36
EEPROM Inteꢂꢂupt ...................................................................................................................... 36
Pꢂogꢂaꢀꢀing Consideꢂations...................................................................................................... 3ꢆ
Pꢂogꢂaꢀꢀing Exaꢀples.............................................................................................................. 3ꢆ
Oscillators ........................................................................................................... 38
Oscillatoꢂ Oveꢂview ..................................................................................................................... 38
System Clock Configurations...................................................................................................... 38
Exteꢂnal Cꢂystal/Ceꢂaꢀic Oscillatoꢂ – HXT ................................................................................. 39
Exteꢂnal Oscillatoꢂ – EC.............................................................................................................. ꢃ0
Inteꢂnal RC Oscillatoꢂ – HIRC ..................................................................................................... ꢃ0
Exteꢂnal 3ꢅ.ꢆ68kHz Cꢂystal Oscillatoꢂ – LXT.............................................................................. ꢃ0
LXT Oscillatoꢂ Low Poweꢂ Function............................................................................................ ꢃ1
Inteꢂnal 3ꢅkHz Oscillatoꢂ – LIRC................................................................................................. ꢃꢅ
Suppleꢀentaꢂy Oscillatoꢂs .......................................................................................................... ꢃꢅ
Operating Modes and System Clocks .............................................................. 42
Systeꢀ Clocks ............................................................................................................................ ꢃꢅ
Systeꢀ Opeꢂation Modes............................................................................................................ ꢃ3
Contꢂol Registeꢂ .......................................................................................................................... ꢃ5
Fast Wake-up.............................................................................................................................. ꢃ6
Opeꢂating Mode Switching.......................................................................................................... ꢃꢆ
Standꢁy Cuꢂꢂent Consideꢂations................................................................................................. 5ꢅ
Wake-up...................................................................................................................................... 53
Pꢂogꢂaꢀꢀing Consideꢂations...................................................................................................... 53
Watchdog Timer.................................................................................................. 54
Watchdog Tiꢀeꢂ Clock Souꢂce.................................................................................................... 5ꢃ
Watchdog Tiꢀeꢂ Contꢂol Registeꢂ............................................................................................... 5ꢃ
Watchdog Tiꢀeꢂ Opeꢂation ......................................................................................................... 55
Reset and Initialisation....................................................................................... 56
Reset Functions .......................................................................................................................... 56
Reset Initial Conditions ............................................................................................................... 59
Input/Output Ports.............................................................................................. 62
Pull-high Resistoꢂs ...................................................................................................................... 6ꢅ
Poꢂt A Wake-up ........................................................................................................................... 6ꢅ
I/O Poꢂt Contꢂol Registeꢂs........................................................................................................... 6ꢅ
I/O Pin Stꢂuctuꢂes........................................................................................................................ 6ꢃ
Pꢂogꢂaꢀꢀing Consideꢂations...................................................................................................... 6ꢃ
Rev. 1.00
3
�oveꢀꢁeꢂ 1ꢃꢄ ꢅ01ꢆ
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
