Datasheet

404
2549O–AVR–05/12
ATmega640/1280/1281/2560/2561
32.10 Internal Oscillator Speed
Figure 32-35. Watchdog Oscillator Frequency vs. V
CC
Figure 32-36. Watchdog Oscillator Frequency vs. Temperature
85°C
25°C
-40°C
114
116
118
120
122
124
126
128
2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
F
RC
(kHz)
5.5V
4.0V
3.3V
2.7V
2.1V
114
116
118
120
122
124
126
128
-60 -40 -20 0 20 40 60 80 100
Temperature (°C)
F
RC
(kHz
)