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CHAPTER 13 16-BIT PPG TIMER
13.7
Usage Notes on the 16-bit PPG Timer
Notes on using the 16-bit PPG timer are given below.
■
Usage Notes on the 16-bit PPG Timer
●
Notes on using a program for setting
•
Write a value to the period setting buffer register (PCSR), duty setting buffer register (PDUT) must be
written after writing to PCSR. Only updating PCSR is prohibited. Be sure to use a word transfer
instruction (MOVW A, dir, etc.) to access PCSR and PDUT.
•
Always set the value of duty setting buffer register (PDUT) not greater than period setting buffer
register (PCSR), otherwise the output of PPG is indeterminate.
•
Change the CKS2, CKS1 and CKS0 bits of the control status register (PCNTH) when the PPG is
stopped (PCNTH: CNTE=0).
●
Notes about interrupts
•
When the IRQF bit of the PPG control status register (PCNTL) is set to "1" and an interrupt request is
enabled (PCNTL: IREN = 1), control cannot be returned from interrupt processing. Always clear the
IRQF bit.
•
Since the 16-bit PPG 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 PPG timer, shared resource interrupts must be disabled.
Содержание MB90460 Series
Страница 1: ...The following document contains information on Cypress products ...
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Страница 41: ...22 CHAPTER 1 OVERVIEW ...
Страница 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Страница 83: ...64 CHAPTER 3 CPU ...
Страница 95: ...76 CHAPTER 4 RESET ...
Страница 107: ...88 CHAPTER 5 CLOCK ...
Страница 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Страница 175: ...156 CHAPTER 7 INTERRUPT ...
Страница 181: ...162 CHAPTER 8 MODE SETTING ...
Страница 223: ...204 CHAPTER 9 I O PORT ...
Страница 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Страница 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Страница 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Страница 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Страница 485: ...466 CHAPTER 16 PWC Timer ...
Страница 531: ...512 CHAPTER 17 UART ...
Страница 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Страница 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Страница 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Страница 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Страница 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Страница 715: ...696 APPENDIX ...
Страница 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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