HT82B42R datasheet(3/86 Pages) HOLTEK

3 / 86 page

Rev. 1.00

October 27, 2011

Rev. 1.00

October 27, 2011

HT82B42R/HT82B42RE

I/O MCU with USB Interface

Pin-shared Functions ............................................................................................................ 26

Programming Considerations................................................................................................ 28

Timer/Event Counters ................................................................................... 28

Configuring the Timer/Event Counter Input Clock Source .................................................... 29

Timer Register – TMR0, TMR1L/TMR1H.............................................................................. 29

Timer Control Register – TMR0C/TMR1C ............................................................................ 30

Configuring the Timer Mode.................................................................................................. 32

Configuring the Event Counter Mode.................................................................................... 32

Configuring the Pulse Width Measurement Mode................................................................. 33

I/O Interfacing........................................................................................................................ 34

Programming Considerations................................................................................................ 34

Timer Program Example ....................................................................................................... 35

Interrupts........................................................................................................ 36

Interrupt Registers................................................................................................................. 36

Interrupt Operation................................................................................................................ 37

Interrupt Priority..................................................................................................................... 38

Timer/Event Counter Interrupt............................................................................................... 38

Programming Considerations................................................................................................ 38

USB Interrupt ........................................................................................................................ 39

Serial Interface Interrupt........................................................................................................ 39

Reset and Initialisation.................................................................................. 39

Reset Functions .................................................................................................................... 40

Reset Initial Conditions ......................................................................................................... 42

Oscillator ........................................................................................................ 44

Watchdog Timer Oscillator .................................................................................................... 44

Power Down Mode and Wake-up.................................................................. 44

Power Down Mode................................................................................................................ 44

Entering the Power Down Mode ........................................................................................... 44

Standby Current Considerations........................................................................................... 45

Wake-up................................................................................................................................ 45

Watchdog Timer............................................................................................. 46

USB Interface ................................................................................................. 47

Suspend Wake-Up and Remote Wake-Up............................................................................ 47

To Configure as PS2 Device ................................................................................................. 48

USB Control Registers.......................................................................................................... 48

STALL and PIPE, PIPE_CTRL, Endpt_EN Registers ........................................................... 51

Serial Interface – SPI .................................................................................... 57

SPI Interface Operation......................................................................................................... 57

SPI Registers ........................................................................................................................ 58

SPI Communication .............................................................................................................. 61

SPI Bus Enable/Disable........................................................................................................ 63

SPI Operation........................................................................................................................ 64

Error Detection...................................................................................................................... 65

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