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CHAPTER 14 MULTI-FUNCTIONAL TIMER
■
Timer Mode
Two count modes can be selected in 16-bit free-run timer
•
up-count mode (TCCSL:MODE=0)
•
up-down count mode (TCCSL:MODE=1)
In up-count mode, counter starts counting from pre-set timer data register (TCDT), counts up until counter
value matches value of compare clear register (CPCLR), then counter is cleared to "0000
H
" and then counts
up again.
In up-down count mode, counter starts counting from pre-set timer data register (TCDT), counts up until
counter value matches value of compare clear register (CPCLR), then counter changes from up-count to
down-count, counts down until counter value reaches "0000
H
" and then counts up again.
There is a buffer in mode bit, TCCSL:MODE, it can be written at any time no matter the timer is operating
or stopped. While the timer is operating, value written to this bit is buffered and the count mode will be
changed when timer value is "0000
H
".
Figure 14.6-2 Change Timer Mode while Timer is Operating
FFFF
H
BFFF
H
7FFF
H
3FFF
H
0000
H
Counter value
Time
Reset
Timer starts
TCCSL:MODE
Change to up-down mode
Change to up mode
BFFF
H
Compare clear
buffer register
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: ......