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ATMEGA3290P Datasheet(PDF) 23 Page - ATMEL Corporation |
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ATMEGA3290P Datasheet(HTML) 23 Page - ATMEL Corporation |
23 / 25 page 23 8021AS–AVR–12/06 ATmega329P/3290P 9. Errata 9.1 ATmega329P rev. A • Interrupts may be lost when writing the timer registers in the asynchronous timer 1. Interrupts may be lost when writing the timer registers in the asynchronous timer If one of the timer registers which is synchronized to the asynchronous timer2 clock is writ- ten in the cycle before a overflow interrupt occurs, the interrupt may be lost. Problem Fix/ Workaround Always check that the Timer2 Timer/Counter register, TCNT2, does not have the value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare Register, OCR2. 9.2 ATmega3290P rev. A • Interrupts may be lost when writing the timer registers in the asynchronous timer 1. Interrupts may be lost when writing the timer registers in the asynchronous timer If one of the timer registers which is synchronized to the asynchronous timer2 clock is writ- ten in the cycle before a overflow interrupt occurs, the interrupt may be lost. Problem Fix/ Workaround Always check that the Timer2 Timer/Counter register, TCNT2, does not have the value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare Register, OCR2. |
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