188
CHAPTER 11 TIMEBASE TIMER
11.5
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 11.5-1 .
●
Setting of timebase timer
Figure 11.5-1 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.
Note:
The interval time may be longer than the one set by clearing the timebase timer counter.
●
Example of operation for timebase timer
Figure 11.5-2 gives an example of the operation that the timebase timer performs under the following
conditions:
•
A power-on reset occurs.
•
The mode transits to the sleep mode during the operation of the interval timer.
•
The mode transits to the stop mode during the operation of the interval timer.
•
A request to clear the timebase timer counter is issued.
TBIE TBOF
TBC1TBC0
TBR
0
0
1
bit15 14
13
12
11
10
9
bit8
0
1
: Undefined bit
: Used bit
: Set to "0".
: Set to "1".
Timebase timer control register
(TBTC)
Re-
served
Summary of Contents for F2MCTM-16LX
Page 2: ......
Page 3: ...FUJITSU LIMITED F2MCTM 16LX 16 BIT MICROCONTROLLER MB90360 Series HARDWARE MANUAL ...
Page 4: ......
Page 42: ...26 CHAPTER 1 OVERVIEW ...
Page 70: ...54 CHAPTER 2 CPU ...
Page 134: ...118 CHAPTER 6 CLOCK SUPERVISOR ...
Page 176: ...160 CHAPTER 8 LOW POWER CONSUMPTION MODE ...
Page 194: ...178 CHAPTER 10 I O PORTS ...
Page 252: ...236 CHAPTER 13 16 Bit I O TIMER ...
Page 282: ...266 CHAPTER 14 16 BIT RELOAD TIMER ...
Page 296: ...280 CHAPTER 15 WATCH TIMER ...
Page 386: ...370 CHAPTER 18 8 10 BIT A D CONVERTER ...
Page 426: ...410 CHAPTER 20 LIN UART Figure 20 5 2 ORE Flag Set Timing RDRF ORE Reception data ...
Page 540: ...524 CHAPTER 22 ADDRESS MATCH DETECTION FUNCTION ...
Page 568: ...552 CHAPTER 24 512K BIT FLASH MEMORY ...
Page 633: ...617 APPENDIX B Instructions Table B 9 3 Bit Operation Instruction Map first byte 6CH ...
Page 634: ...618 APPENDIX Table B 9 4 Character String Operation Instruction Map first byte 6EH ...
Page 637: ...621 APPENDIX B Instructions Table B 9 7 ea Instruction 2 first byte 71H ...
Page 638: ...622 APPENDIX Table B 9 8 ea Instruction 3 first byte 72H ...
Page 639: ...623 APPENDIX B Instructions Table B 9 9 ea Instruction 4 first byte 73H ...
Page 640: ...624 APPENDIX Table B 9 10 ea Instruction 5 first byte 74H ...
Page 641: ...625 APPENDIX B Instructions Table B 9 11 ea Instruction 6 first byte 75H ...
Page 642: ...626 APPENDIX Table B 9 12 ea Instruction 7 first byte 76H ...
Page 643: ...627 APPENDIX B Instructions Table B 9 13 ea Instruction 8 first byte 77H ...
Page 644: ...628 APPENDIX Table B 9 14 ea Instruction 9 first byte 78H ...
Page 645: ...629 APPENDIX B Instructions Table B 9 15 MOVEA RWi ea Instruction first byte 79H ...
Page 646: ...630 APPENDIX Table B 9 16 MOV Ri ea Instruction first byte 7AH ...
Page 647: ...631 APPENDIX B Instructions Table B 9 17 MOVW RWi ea Instruction first byte 7BH ...
Page 648: ...632 APPENDIX Table B 9 18 MOV Ri ea Instruction first byte 7CH ...
Page 649: ...633 APPENDIX B Instructions Table B 9 19 MOVW ea Rwi Instruction first byte 7DH ...
Page 650: ...634 APPENDIX Table B 9 20 XCH Ri ea Instruction first byte 7EH ...
Page 651: ...635 APPENDIX B Instructions Table B 9 21 XCHW RWi ea Instruction first byte 7FH ...
Page 664: ...648 APPENDIX ...
Page 665: ...649 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 682: ......