BS84B08A-3 Datasheet, PDF (4/123 Pages) Holtek Semiconductor Inc – A/D Type Touch Key MCU

BS84B08A-3/BS84C12A-3
A/D Type Touch Key MCU
Timer/Event Counter...................................................................................... 57
Configuring the Timer/Event Counter Input Clock Source..................................................... 57
Timer Register – TMR............................................................................................................ 58
Timer Control Register – TMRC............................................................................................. 58
Timer Operation..................................................................................................................... 59
Prescaler................................................................................................................................ 59
Programming Considerations................................................................................................. 59
Analog to Digital Converter........................................................................... 60
A/D Overview......................................................................................................................... 60
A/D Converter Register Description....................................................................................... 60
A/D Converter Data Registers – ADRL, ADRH...................................................................... 61
A/D Converter Control Registers – ADCR0, ADCR1, ACERL................................................ 61
A/D Operation........................................................................................................................ 64
A/D Input Pins........................................................................................................................ 65
Summary of A/D Conversion Steps........................................................................................ 66
Programming Considerations................................................................................................. 67
A/D Transfer Function............................................................................................................ 67
A/D Programming Examples.................................................................................................. 68
Touch Key Function....................................................................................... 70
Touch Key Structure............................................................................................................... 70
Touch Key Register Definition................................................................................................ 70
Touch Key Operation.............................................................................................................. 76
Touch Key Interrupt................................................................................................................ 78
Programming Considerations................................................................................................. 79
Serial Interface Module – SIM ....................................................................... 79
SPI Interface ......................................................................................................................... 79
SPI Interface Operation ......................................................................................................... 79
SPI Registers......................................................................................................................... 80
SPI Communication .............................................................................................................. 83
I²C Interface .......................................................................................................................... 85
I²C Interface Operation .......................................................................................................... 85
I²C Registers.......................................................................................................................... 86
I²C Bus Communication ........................................................................................................ 90
I²C Bus Start Signal ............................................................................................................... 91
Slave Address ....................................................................................................................... 91
I²C Bus Read/Write Signal .................................................................................................... 91
I²C Bus Slave Address Acknowledge Signal ......................................................................... 91
I²C Bus Data and Acknowledge Signal ................................................................................. 92
I²C Time-out Control............................................................................................................... 93
Rev. 1.00
4
May 02, 2013