HT45F23A View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
Manufacturer
HT45F23A Datasheet PDF : 148 Pages
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HT45F23A
8-Bit Flash MCU with Op Amps & Comparators
Port B NMOS Open Drain Control Register........................................................................... 59
I/O Pin Structures................................................................................................................... 59
Programming Considerations................................................................................................. 59
Timer/Event Counters.................................................................................... 60
Configuring the Timer/Event Counter Input Clock Source..................................................... 61
Timer Registers – TMR0, TMR1L, TMR1H............................................................................ 61
Timer Control Registers – TMR0C, TMR1C........................................................................... 62
Configuring the Timer Mode................................................................................................... 63
Configuring the Event Counter Mode..................................................................................... 63
Configuring the Pulse Width Measurement Mode.................................................................. 64
Programmable Frequency Divider PFD................................................................................. 65
Prescaler................................................................................................................................ 66
I/O Interfacing......................................................................................................................... 67
Timer/Event Counter Pins Internal Filter................................................................................ 68
Programming Considerations................................................................................................. 68
Timer Program Example........................................................................................................ 69
Pulse Width Modulator................................................................................... 70
PWM Operation...................................................................................................................... 70
6+2 PWM Mode..................................................................................................................... 71
7+1 PWM Mode..................................................................................................................... 72
PWM Output Control.............................................................................................................. 73
Analog to Digital Converter........................................................................... 73
A/D Overview......................................................................................................................... 73
A/D Converter Register Description....................................................................................... 73
A/D Converter Data Registers – ADRL, ADRH...................................................................... 74
A/D Converter Control Registers – ADCR, ACSR, ADPCR................................................... 74
A/D Operation........................................................................................................................ 77
A/D Input Pins........................................................................................................................ 78
Summary of A/D Conversion Steps........................................................................................ 78
Programming Considerations................................................................................................. 79
A/D Transfer Function............................................................................................................ 79
A/D Programming Example.................................................................................................... 81
Serial Interface Module – SIM........................................................................ 83
SPI Interface.......................................................................................................................... 83
SPI Registers......................................................................................................................... 84
SPI Communication............................................................................................................... 87
I2C Interface........................................................................................................................... 89
I2C Registers.......................................................................................................................... 89
I2C Bus Communication......................................................................................................... 93
I2C Bus Start Signal................................................................................................................ 94
Slave Address........................................................................................................................ 94
I2C Bus Read/Write Signal..................................................................................................... 95
I2C Bus Slave Address Acknowledge Signal.......................................................................... 95
I2C Bus Data and Acknowledge Signal.................................................................................. 95
Rev. 1.00
4
July 03, 2012
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