Rainbow Electronics ATmega8HVD - Manual (Page 50)

50
8052B–AVR–09/08
ATmega4HVD/8HVD
Table 10-2. Watchdog Timer Prescale Select (Typical Timeout at V
CC
= 2.2V)
WDP3 WDP2 WDP1 WDP0
Number of WDT
Oscillator Cycles
Timeout
Units Min. Typ. Max.
0 0 0 0 2K cycles 12 16 23 ms
0 0 0 1 4K cycles 24 31 45 ms
0 0 1 0 8K cycles 48 63 90 ms
0 0 1 1 16K cycles 0.096 0.125 0.180 s
0 1 0 0 32K cycles 0.19 0.25 0.36 s
0 1 0 1 64K cycles 0.4 0.5 0.7 s
0 1 1 0 128K cycles 0.8 1.0 1.4 s
0 1 1 1 256K cycles 1.5 2.0 2.9 s
1 0 0 0 512K cycles 3.1 4.0 5.8 s
1 0 0 1 1024K cycles 6.1 8.0 11.5 s
1 0 1 0
Reserved
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1