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HT45F23A Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

Part # HT45F23A
Description  8-Bit Flash MCU with Op Amps & Comparators
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F23A Datasheet(HTML) 4 Page - Holtek Semiconductor Inc

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HT45F23A
8-Bit Flash MCU with Op Amps & Comparators
HT45F23A
8-Bit Flash MCU with Op Amps & Comparators
Port B NMOS Open Drain Contro� Register .......................................................................... 59
I/O Pin Str�ct�res.................................................................................................................. 59
Programming Considerations................................................................................................ 59
Timer/Event Counters ................................................................................... 60
Configuring the Timer/Event Counter Input Clock Source .................................................... 61
Timer Registers – TMR0� TMR1L� TMR1H ........................................................................... 61
Timer Contro� Registers – TMR0C� TMR1C.......................................................................... 6�
Configuring the Timer Mode.................................................................................................. 6�
Configuring the Event Counter Mode.................................................................................... 6�
Configuring the Pulse Width Measurement Mode................................................................. 64
Programmab�e Freq�enc� Divider PFD ................................................................................ 65
Presca�er ............................................................................................................................... 66
I/O Interfacing........................................................................................................................ 67
Timer/Event Co�nter Pins Interna� Fi�ter ............................................................................... 68
Programming Considerations................................................................................................ 68
Timer Program Examp�e ....................................................................................................... 69
Pulse Width Modulator.................................................................................. 70
PWM Operation..................................................................................................................... 70
6+� PWM Mode .................................................................................................................... 71
7+1 PWM Mode .................................................................................................................... 7�
PWM O�tp�t Contro� ............................................................................................................. 7�
Analog to Digital Converter .......................................................................... 73
A/D Overview ........................................................................................................................ 7�
A/D Converter Register Description ...................................................................................... 7�
A/D Converter Data Registers – ADRL� ADRH ..................................................................... 74
A/D Converter Contro� Registers – ADCR� ACSR� ADPCR .................................................. 74
A/D Operation ....................................................................................................................... 77
A/D Inp�t Pins ....................................................................................................................... 78
S�mmar� of A/D Conversion Steps....................................................................................... 78
Programming Considerations................................................................................................ 79
A/D Transfer F�nction ........................................................................................................... 79
A/D Programming Examp�e................................................................................................... 81
Serial Interface Module – SIM ....................................................................... 83
SPI Interface ......................................................................................................................... 8�
SPI Registers ........................................................................................................................ 84
SPI Comm�nication .............................................................................................................. 87
I�C Interface .......................................................................................................................... 89
I�C Registers ......................................................................................................................... 89
I�C B�s Comm�nication ........................................................................................................ 9�
I�C B�s Start Signa�............................................................................................................... 94
S�ave Address ....................................................................................................................... 94
I�C B�s Read/Write Signa� .................................................................................................... 95
I�C B�s S�ave Address Acknow�edge Signa� ......................................................................... 95
I�C B�s Data and Acknow�edge Signa� ................................................................................. 95


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