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CHAPTER 16 PWC Timer
In all modes, the timer does not start count during the period from the start of measurement to input of
measurement start edge. After the measurement start edge is input, the timer is cleared to "0000
H
", and the
count is incremented at each count clock until the measurement termination edge is input.
When the measurement termination edge is input, the following operations are executed
(1) The count end flag (EDIR) of PWCSH0/PWCSH1 is set.
(2) The timer stops count operation (except if the timer is restarted at the same time or
continuous measurement mode of the H/L pulse-width measurement is used).
(3)Continuous measurement mode: The timer value (measurement result) is transferred to PWC0/PWC1.
(4) Single measurement mode: Measurement is terminated (except if the timer is restarted at
the same time).
If all edge-to-edge pulse-width measurement, period measurement, falling edge-to-falling edge period
measurement, or rising edge-to-rising edge period measurement is done in continuous measurement mode,
the termination edge becomes the next measurement start edge.
Falling edge-to-falling
edge period
measurement
1
1
1
The falling edge-to-falling edge time is measured.
Start of measurement:
Termination of measurement:
When the falling edge is detected
When the falling edge is detected
All edge pulse-width
measurement
0
1
0
The width between continuous input edges is measured.
Start of measurement:
Termination of measurement:
When the edge is detected
When the edge is detected
Division
measurement
0
1
1
(Divided by 4 in the above example.)
The input pulse is divided by the division rate set in the division rate
register (DIVR), and the measurement period is obtained as a result.
Start of measurement:
The falling edge is detected after
the operation is started.
Termination of measurement:
One period of division signal ends.
W: Pulse width being measured
Table 16.6-6 Measurement Mode Operation (2/2)
Measurement mode MOD2 MOD1 MOD0
Measurement operation
w
w
w
Start of
measurement
Termination of
measurement
Termination
w
Start
Termination
Start
w
w
w
Start of
measurement
Termination of
measurement
Start
Start
Termination
Termination
w
w
w
w
Start of
measurement
Termination of
measurement
w
Start
Termination
φ
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: ......