Rainbow Electronics ATmega163L - Manual (Page 52)

ATmega163(L)
52
• Bits 2..0 - WDP2, WDP1, WDP0: Watchdog Timer Prescaler 2, 1, and 0
The WDP2, WDP1, and WDP0 bits determine the Watchdog Timer prescaling when the Watchdog Timer is enabled. The
different prescaling values and their corresponding Timeout Periods are shown in Table 23.
Table 23. Watch Dog Timer Prescale Select
WDP2 WDP1 WDP0
Number of
WDT Oscillator Cycles
Typical Time-out
at V
CC
= 3.0V
Typical Time-out
at V
CC
= 5.0V
0 0 0 16K cycles 47 ms 15 ms
0 0 1 32K cycles 94 ms 30 ms
0 1 0 64K cycles 0.19 s 60 ms
0 1 1 128K cycles 0.38 s 0.12 s
1 0 0 256K cycles 0.75 s 0.24 s
1 0 1 512K cycles 1.5 s 0.49 s
1 1 0 1,024K cycles 3.0 s 0.97 s
1 1 1 2,048K cycles 6.0 s 1.9 s