Datasheet

8024A–AVR–04/08

ATmega8HVA/16HVA

Note: 1. The actual timeout value depends on the actual clock period of the Ultra Low Power RC Oscil-

lator, refer to ”Ultra Low Power RC Oscillator” on page 26 for details.

Table 11-2. Watchdog Timer Prescale Select

WDP3 WDP2 WDP1 WDP0

Number of WDT

Oscillator Cycles

Typical

Time-out

(1)

0 0 0 0 2K cycles 16 ms

0 0 0 1 4K cycles 32 ms

0 0 1 0 8K cycles 64 ms

0 0 1 1 16K cycles 0.13s

0 1 0 0 32K cycles 0.26s

0 1 0 1 64K cycles 0.51s

0 1 1 0 128K cycles 1.0s

0 1 1 1 256K cycles 2.0s

1 0 0 0 512K cycles 4.1s

1 0 0 1 1024K cycles 8.2s

1010

Reserved

1011

1100

1101

1110

1111