atmega169a-mch ATMEL Corporation, atmega169a-mch Datasheet - Page 35

• Manufacturer Part Number: atmega169a-mch
• Description: 8-bit Avr 8-bit Microcontroller Microcontroller With 32k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

10.9
10.10 ATmega649A/649PA/ATmega6490A/6490P
8284AS–AVR–10/10
ATmega3290A/3290PA rev. C
•
1. Interrupts may be lost when writing the timer registers in the asynchronous timer
No known errata.
Interrupts may be lost when writing the timer registers in the asynchronous timer
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
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).
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