Rainbow-electronics ATmega8HVD Manuel d'utilisateur télécharger pdf (Page 50)

8052B–AVR–09/08

ATmega4HVD/8HVD

Table 10-2. Watchdog Timer Prescale Select (Typical Timeout at V

= 2.2V)

WDP3 WDP2 WDP1 WDP0

Number of WDT

Oscillator Cycles

Timeout

UnitsMin. Typ. Max.

0000 2K cycles 12 16 23 ms

0001 4K cycles 24 31 45 ms

0010 8K cycles 48 63 90 ms

0011 16K cycles 0.096 0.125 0.180 s

0100 32K cycles 0.19 0.25 0.36 s

0101 64K cycles 0.4 0.5 0.7 s

0110 128K cycles 0.8 1.0 1.4 s

0111 256K cycles 1.5 2.0 2.9 s

1000 512K cycles 3.1 4.0 5.8 s

1001 1024K cycles 6.1 8.0 11.5 s

1010

Reserved

1011

1100

1101

1110

1111

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 167 168

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Rainbow-electronics ATmega8HVD Manuel d'utilisateur Page 50