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CHAPTER 16 PWC Timer
●
Stopping the timer
In one-shot timer mode or single measurement mode, measurement is automatically discontinued when the
timer overflows or at the end of a count. The user need not know if the timer has stopped. However, in
other modes, the timer must be stopped. This is also true when the timer is to be stopped before the timer
automatically stops.
●
Checking operation state
The previously described STRT and STOP bits function as bits that indicate the operation state of the timer
during a read operation. Table 16.6-3 lists the contents of the indicated values
During a read operation, both the STRT bit and the STOP bit have the same value. However, during a read
operation using the read modify write instruction (such as bit manipulation instruction), the values of the
bits are always 11
B
. Do not use this instruction to read the values of the bits.
■
Clearing theTimer
In the following cases, the 16-bit up-count timer is cleared to "0000
H
":
•
During reset
•
When a count has started after the count start edge is detected in the pulse-width measurement mode
Table 16.6-3 Functions of Operation State Indication Bits
STRT
STOP
Operation state
0
0
Timer is stopping (except measurement start edge wait state).
The bits indicate that the timer has not started or a measurement has terminated.
1
1
Measurement start edge wait state or timer count operation
Содержание MB90460 Series
Страница 1: ...The following document contains information on Cypress products ...
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Страница 41: ...22 CHAPTER 1 OVERVIEW ...
Страница 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Страница 83: ...64 CHAPTER 3 CPU ...
Страница 95: ...76 CHAPTER 4 RESET ...
Страница 107: ...88 CHAPTER 5 CLOCK ...
Страница 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Страница 175: ...156 CHAPTER 7 INTERRUPT ...
Страница 181: ...162 CHAPTER 8 MODE SETTING ...
Страница 223: ...204 CHAPTER 9 I O PORT ...
Страница 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Страница 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Страница 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Страница 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Страница 485: ...466 CHAPTER 16 PWC Timer ...
Страница 531: ...512 CHAPTER 17 UART ...
Страница 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Страница 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Страница 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Страница 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Страница 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Страница 715: ...696 APPENDIX ...
Страница 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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