Datasheet

1. In the same operation, write a logical one to WDCE and WDE. Even though the WDE always is set,
the WDE must be written to one to start the timed sequence.
2. Within the next four clock cycles, in the same operation, write the WDP bits as desired, but with the
WDCE bit cleared. The value written to the WDE bit is irrelevant.
15.6. Register Description
Atmel ATmega64A [DATASHEET]
Atmel-8160E-ATmega64A_Datasheet_Complete-09/2015
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