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CHAPTER 16 PWC Timer
16.7
Usage Notes on the PWC Timer
Notes on using the PWC timer are given below.
■
Usage Notes on the PWC Timer
●
Notes about using a program for setting
•
Changing the following PWCS0/PWCS1 bit values is prohibited during timer operation. The bit values
are changed only before the timer is started or after the operation is discontinued.
[bit7, bit6] CKS1 and CKS0: Clock selection bits
[bit3] S/C: Measurement mode (single or continuous) selection bit
[bit2 to bit0] MOD2, MOD1, and MOD0: Operation mode and measurement edge selection bits
Note that the value of pulse output level indication bit (POUT: bit8) remains unchanged even if the bit
is written during timer operation.
•
Changing the DIV0/DIV1 value is prohibited during timer operation. Change the DIV0/DIV1 value
before the timer is started or after the operation has stopped.
•
Setting the clock selection bits CKS1 and CKS0 of PWC control status register (PWCSL0/PWCSL1) to
11
B
is prohibited.
•
The PWC0/PWC1 and timer values are determined when the timer is set in the one-shot mode or after
the operation is terminated in reload timer mode. Therefore, always set the values after the timer is
used.
•
The PWC0/PWC1 value is undefined if the timer is set in reload timer mode after the operation is
discontinued in the one-shot mode. Therefore, always set the value before the timer is used.
•
To change the mode from pulse-width measurement mode to timer mode, always set the value in
PWC0/PWC1 before the timer has started.
•
When division period measurement mode is used in pulse-width measurement mode, the input pulse is
divided. Note that the pulse width calculated from the count result becomes a mean.
•
During continuous measurement in pulse-width measurement mode, the division circuit for an internal
count clock is not cleared, and the number of edges smaller than the count clock is added to the count
result.
Summary of Contents for MB90460 Series
Page 1: ...The following document contains information on Cypress products ...
Page 3: ......
Page 5: ......
Page 9: ...iv ...
Page 41: ...22 CHAPTER 1 OVERVIEW ...
Page 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Page 83: ...64 CHAPTER 3 CPU ...
Page 95: ...76 CHAPTER 4 RESET ...
Page 107: ...88 CHAPTER 5 CLOCK ...
Page 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 175: ...156 CHAPTER 7 INTERRUPT ...
Page 181: ...162 CHAPTER 8 MODE SETTING ...
Page 223: ...204 CHAPTER 9 I O PORT ...
Page 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Page 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Page 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Page 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Page 485: ...466 CHAPTER 16 PWC Timer ...
Page 531: ...512 CHAPTER 17 UART ...
Page 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Page 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Page 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Page 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Page 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Page 715: ...696 APPENDIX ...
Page 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 739: ......