Datasheet

59
7799D–AVR–11/10
ATmega8U2/16U2/32U2
1010
Reserved
1011
1100
1101
1110
1111
Table 10-3. Watchdog Timer Prescale Select, DIV = 0 (CLKwdt = CLK128 / 1) (Continued)
WDP3 WDP2 WDP1 WDP0
Number of WDT Oscillator
Cycles before 1st time-out
(Early warning)
Early warning Typical
Time-out at
V
CC
= 5.0V
Watchdog
Reset/Interrupt Typical
Time-out at
V
CC
= 5.0V
Table 10-4. Watchdog Timer Prescale Select, DIV = 1 (CLKwdt = CLK128 / 3)
WDP3 WDP2 WDP1 WDP0
Number of WDT Oscillator
Cycles before 1st time-out
(Early warning)
Early warning Typical
Time-out at
V
CC
= 5.0V
Watchdog
Reset/Interrupt Typical
Time-out at
V
CC
= 5.0V
0 0 0 0 2K (2048) cycles 48 ms 96 ms
0 0 0 1 4K (4096) cycles 96 ms 192 ms
0 0 1 0 8K (8192) cycles 192 ms 384 ms
0 0 1 1 16K (16384) cycles 0.375 s 0.75 s
0 1 0 0 32K (32768) cycles 0.75 s 1.5 s
0 1 0 1 64K (65536) cycles 1.5 s 3 s
0 1 1 0 128K (131072) cycles 3 s 6 s
0 1 1 1 256K (262144) cycles 6 s 12 s
1 0 0 0 512K (524288) cycles 12 s 24 s
1 0 0 1 1024K (1048576) cycles 24 s 48 s
1010
Reserved
1011
1100
1101
1110
1111