Datasheet

63
7799D–AVR–11/10
ATmega8U2/16U2/32U2
1010
Reserved
1011
1100
1101
1110
1111
Table 10-9. Watchdog Timer Prescale Select, DIV = 6(CLKwdt = CLK128 / 13) (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 10-10. Watchdog Timer Prescale Select, DIV = 7 (CLKwdt = CLK128 / 15)
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 120 ms 240 ms
0 0 0 1 4K (4096) cycles 240 ms 480 ms
0 0 1 0 8K (8192) cycles 480 ms 960 ms
0 0 1 1 16K (16384) cycles 0.960 s 1.9 s
0 1 0 0 32K (32768) cycles 1.92 s 3.8 s
0 1 0 1 64K (65536) cycles 3.8 s 7.6 s
0 1 1 0 128K (131072) cycles 7.6 s 15.3 s
0 1 1 1 256K (262144) cycles 15.3 s 30.7 s
1 0 0 0 512K (524288) cycles 30.7 s 61.4 s
1 0 0 1 1024K (1048576) cycles 61.4 s 122 s
1010
Reserved
1011
1100
1101
1110
1111