atmega3290v ATMEL Corporation, atmega3290v Datasheet - Page 26

• Manufacturer Part Number: atmega3290v
• Description: Atmega3290 Avr 8-bit Microcontroller With In-system Programmable Flash
• Manufacturer: ATMEL Corporation

10.3
10.3.1
10.4
10.4.1
26
ATmega649
ATmega6490
ATmega329/3290/649/6490
ATmega649 rev. A
ATmega6490 rev. A
•
1. 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
Interrupts may be lost when writing the timer registers in the asynchronous timer
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/Wortkaround
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.
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/Wortkaround
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.
2552JS–AVR–08/07