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CHAPTER 12 16-BIT RELOAD TIMER
12.6.2
Internal Clock Mode (single-shot mode)
Synchronized with the internal count clock, the 16-bit reload timer is used for counting
down of the 16-bit counter, generating an interrupt request to the CPU for a counter
underflow. It can also output from the TO pin a rectangular waveform indicating that
counting is in progress.
■
Internal Clock Mode (Single-shot Mode)
When counting is enabled (TMCSRL0/TMCSRL1:CNTE = 1) and the timer is started with the software
trigger bit (TMCSRL0/TMCSRL1:TRG) or external trigger, counting starts. If the count enable bit and
software trigger bit are set to "1" simultaneously, counting starts simultaneously with the enabling of
counting. When an underflow of the counter value (from 0000
H
to FFFF
H
) occurs, the counter stops in the
FFFF
H
state. If the underflow interrupt flag (TMCSRL0/TMCSRL1:UF) bit is set to "1" and the underflow
interrupt enable (TMCSRL0/TMCSRL1:INTE) bit is "1", an interrupt request is generated.
The timer can also output from the TO0/TO1 pin a rectangular waveform indicating that counting is in
progress.
●
Software trigger operation
When "1" is written to the TRG bit of the timer control status register (TMCSRL0/TMCSRL1), the counter
is started. Figure 12.6-7 shows the software trigger operation in single-shot mode.
Figure 12.6-7 Count Operation in Single-shot Mode (Software Trigger Operation)
Count clock
Counter
Data load signal
UF bit
CNTE bit
TRG bit
TO pin
Wait for trigger input
Reload data
Reload data
T: Machine cycle
*
It takes 1T time from trigger input to loading of the reload data.
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: ......