7906 datasheet(13/531 Pages) RENESAS

13 / 531 page

7906 Group User’s Manual Rev.2.0

Table of contents

13.3 D-A conversion method ................................................................................................... 13-4

13.4 Setting method ................................................................................................................... 13-5

13.5 Operation description ....................................................................................................... 13-5

[Precautions for D-A converter] .............................................................................................. 13-6

CHAPTER 14. WATCHDOG TIMER

14.1 Block description .............................................................................................................. 14-2

14.1.1 Watchdog timer .......................................................................................................... 14-3

14.1.2 Watchdog timer frequency select register .............................................................. 14-3

14.1.3 Particular function select register 2 ......................................................................... 14-4

14.2 Operation description ....................................................................................................... 14-5

14.2.1 Basic operation ........................................................................................................... 14-5

14.2.2 Stop period ................................................................................................................. 14-7

14.2.3 Operations in stop mode .......................................................................................... 14-7

[Precautions for watchdog timer] ........................................................................................... 14-8

CHAPTER 15. STOP AND WAIT MODES

15.1 Overview .............................................................................................................................. 15-2

15.2 Block description .............................................................................................................. 15-3

15.2.1 Particular function select register 0 ......................................................................... 15-4

15.2.2 Particular function select register 1 ......................................................................... 15-6

15.2.3 Watchdog timer frequency select register .............................................................. 15-7

15.3 Stop mode ........................................................................................................................... 15-8

15.3.1 Terminate operation at interrupt request occurrence (when using watchdog timer) ... 15-8

15.3.2 Terminate operation at interrupt request occurrence (when not using watchdog timer) 15-9

15.3.3 Terminate operation at hardware reset ................................................................. 15-11

15.4 Wait mode ......................................................................................................................... 15-12

15.4.1 Terminate operation at interrupt request occurrence .......................................... 15-12

15.4.2 Terminate operation at hardware reset ................................................................. 15-12

CHAPTER 16. POWER SAVING FUNCTIONS

16.1 Overview .............................................................................................................................. 16-2

16.1.1 Particular function select register 0 ......................................................................... 16-3

16.1.2 Particular function select register 1 ......................................................................... 16-5

16.2 Inactivity of system clock in wait mode ....................................................................... 16-6

16.3 Stop of oscillation circuit ................................................................................................ 16-7

16.4 Pin VREF disconnection ..................................................................................................... 16-7

CHAPTER 17. DEBUG FUNCTION

17.1 Overview .............................................................................................................................. 17-2

17.2 Block description .............................................................................................................. 17-2

17.2.1 Debug control register 0 ........................................................................................... 17-3

17.2.2 Debug control register 1 ........................................................................................... 17-4

17.2.3 Address compare registers 0 and 1 ........................................................................ 17-5

17.3 Address matching detection mode ............................................................................... 17-6

17.3.1 Setting procedure for address matching detection mode ..................................... 17-6

17.3.2 Operations in address matching detection mode .................................................. 17-7

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