200
CHAPTER 5 Timebase timer
5.5
Explanation of Operations of Timebase Timer Functions
The timebase timer operates as an interval timer or an oscillation stabilization wait time
timer. It also supplies a clock to peripherals.
■
Interval Timer Function
Interrupt generation at every interval time enables the timebase timer to be used as an interval timer.
Operating the timebase timer as an interval timer requires the settings shown in Figure 5.5-1.
●
Setting of timebase timer
Figure 5.5-1 Setting of timebase timer
●
Operations of the Interval Timer Functions
The timebase timer can be used as an interval timer by generating an interrupt at every set interval time.
•
The timebase timer continues incrementing in synchronization with the main clock (a half frequency of
the oscillation clock) while the oscillation clock is active.
•
When the timebase timer counter reaches the interval time set by the interval time select bits in the
timebase timer control register (TBTC: TBC1, TBC0), it causes an overflow (carrying) and the overflow
interrupt request flag bit (TBTC: TBOF) is set to "1".
•
When the overflow interrupt request flag bit is set (TBTC: TBOF = 1) with interrupts enabled (TBTC:
TBIE = 1), an interrupt request is generated.
TBIE TBOF
TBC1TBC0
TBR
Reserved
-
-
Timebase timer control register
(TBTC)
0
0
1
bit15 14 13 12 11 10
9
bit8
-: Unused bit
: Used bit
0 : Set to "0".
1 : Set to "1".
Note:
The interval time may be longer than the one set by clearing the timebase timer counter.
Содержание F2MC-16LX Series
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Страница 677: ...659 APPENDIX A Instructions Table A 9 4 Character String Operation Instruction Map first byte 6EH ...
Страница 678: ...660 APPENDIX Table A 9 5 2 byte Instruction Map first byte 6FH MUL MULW DIVU A A A ...
Страница 680: ...662 APPENDIX Table A 9 7 ea Instruction 2 first byte 71H ...
Страница 681: ...663 APPENDIX A Instructions Table A 9 8 ea Instruction 3 first byte 72H ...
Страница 682: ...664 APPENDIX Table A 9 9 ea Instruction 4 first byte 73H ...
Страница 683: ...665 APPENDIX A Instructions Table A 9 10 ea Instruction 5 first byte 74H ...
Страница 684: ...666 APPENDIX Table A 9 11 ea Instruction 6 first byte 75H ...
Страница 685: ...667 APPENDIX A Instructions Table A 9 12 ea Instruction 7 first byte 76H ...
Страница 686: ...668 APPENDIX Table A 9 13 ea Instruction 8 first byte 77H ...
Страница 687: ...669 APPENDIX A Instructions Table A 9 14 ea Instruction 9 first byte 78H ...
Страница 688: ...670 APPENDIX Table A 9 15 MOVEA RWi ea Instruction first byte 79H ...
Страница 689: ...671 APPENDIX A Instructions Table A 9 16 MOV Ri ea Instruction first byte 7AH ...
Страница 690: ...672 APPENDIX Table A 9 17 MOVW RWi ea Instruction first byte 7BH ...
Страница 691: ...673 APPENDIX A Instructions Table A 9 18 MOV ea Ri Instruction first byte 7CH ...
Страница 692: ...674 APPENDIX Table A 9 19 MOVW ea Rwi Instruction first byte 7DH ...
Страница 693: ...675 APPENDIX A Instructions Table A 9 20 XCH Ri ea Instruction first byte 7EH ...
Страница 694: ...676 APPENDIX Table A 9 21 XCHW RWi ea Instruction first byte 7FH ...
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