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CHAPTER 12 16-BIT RELOAD TIMER
12.7
Usage Notes on the 16-bit Reload Timer
Notes on using the 16-bit reload timer are given below.
■
Usage Notes on the 16-bit Reload Timer
●
Notes on using a program for setting
•
Write a value to the 16-bit reload register (TMRD0/TMRD1) when counting stops (TMCSRL0/
TMCSRL1:CNTE = 0). Also, a value can be read from the 16-bit timer register (TMR0/TMR1) even
during counting, but always be sure to use a word transfer instruction (MOVW A, dir, etc.).
•
Change the CSL1 and CSL0 bits of the timer control status register (TMCSRH0/TMCSRH1) when the
counter has stopped (TMCSRL0/TMCSRL1:CNTE = 0).
●
Notes about interrupts
•
When the UF bit of the timer control status register (TMCSRL0/TMCSRL1) is set to "1" and an
interrupt request is enabled (TMCSRL0/TMCSRL1:INTE = 1), control cannot be returned from
interrupt processing. Always clear the UF bit.
•
Since the 16-bit reload timer shares an interrupt vector with other resource, interrupt causes must be
checked carefully by the interrupt processing routine when interrupts are used.
Also, when EI
2
OS is used by the 16-bit reload timer, shared resource interrupts must be disabled.
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: ......