Datasheet

ATmega164A/PA/324A/PA/644A/PA/1284/P
 2018 Microchip Technology Inc. Data Sheet Complete DS40002070A-page 520
30.7.11 Internal oscillator speed
Figure 30-331. ATmega1284: Watchdog oscillator frequency vs. temperature
Figure 30-332. ATmega1284: Watchdog oscillator frequency vs. V
CC
5.5V
4.0V
3.3V
2.7V
113
114
115
116
117
118
119
120
121
122
123
-40 -30 -20 -10 0 10 20 304050607080 90
Temperature [°C]
F
RC
[kHz]
85°C
25°C
-40°C
114
116
118
120
122
124
V
CC
[V]
F
RC
[kHz]
4.03.53.02.52.0 5.55.04.5