ATmega3290P datasheet(375/385 Pages) ATMEL

375 / 385 page

375

8021E–AVR–07/09

ATmega329P/3290P

33. Errata

33.1

ATmega329P rev. A

• Interrupts may be lost when writing the timer registers in the asynchronous timer

• Using BOD disable will make the chip reset

Interrupts may be lost when writing the timer registers in the asynchronous timer

The interrupt will be lost if a timer register that is synchronous timer clock is written when the

asynchronous Timer/Counter register (TCNTx) is 0x00.

Problem Fix/ Workaround

Always check that the asynchronous Timer/Counter register neither have the value 0xFF nor

0x00 before writing to the asynchronous Timer Control Register (TCCRx), asynchronous

Timer Counter Register (TCNTx), or asynchronous Output Compare Register (OCRx).

Using BOD disable will make the chip reset

If the part enters sleep with the BOD turned off with the BOD disable option

enabled, a BOD reset will be generated at wakeup and the chip will reset.

Problem Fix/Workaround

Do not use BOD disable

33.2

ATmega329P rev. B

• 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

The interrupt will be lost if a timer register that is synchronous timer clock is written when the

asynchronous Timer/Counter register (TCNTx) is 0x00.

Problem Fix/ Workaround

Always check that the asynchronous Timer/Counter register neither have the value 0xFF nor

0x00 before writing to the asynchronous Timer Control Register (TCCRx), asynchronous

Timer Counter Register (TCNTx), or asynchronous Output Compare Register (OCRx).

33.3

ATmega329P rev. C

• 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

The interrupt will be lost if a timer register that is synchronous timer clock is written when the

asynchronous Timer/Counter register (TCNTx) is 0x00.

Problem Fix/ Workaround

Always check that the asynchronous Timer/Counter register neither have the value 0xFF nor

0x00 before writing to the asynchronous Timer Control Register (TCCRx), asynchronous

Timer Counter Register (TCNTx), or asynchronous Output Compare Register (OCRx).

ATmega3290P Datasheet(PDF) 375 Page - ATMEL Corporation