Datasheet

409
ATmega640/1280/1281/2560/2561
2549K–AVR–01/07
Internal Oscillator Speed Figure 201. Watchdog Oscillator Frequency vs. V
CC
Figure 202. Watchdog Oscillator Frequency vs. Temperature
WATCHDOG OSCILLATOR FREQUENCY vs. V
CC
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)
WATCHDOG OSCILLATOR FREQUENCY vs. TEMPERATURE
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
F
RC
(k
Hz
)