Datasheet

Figure 30-37. Watchdog Oscillator Frequency vs. V
CC
105 °C
85 °C
25 °C
-40 °C
106
108
110
112
114
116
118
120
2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
F
RC
(kHz)
Figure 30-38. Calibrated 8MHz RC Oscillator vs. V
CC
105 °C
85 °C
25 °C
-40 °C
7.5
7.6
7.7
7.8
7.9
8
8.1
8.2
8.3
8.4
2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
F
RC
(MHz)
Figure 30-39. Calibrated 8MHz RC Oscillator vs. Temperature
5.5 V
4.5 V
3.6 V
2.7 V
1.8 V
7.4
7.5
7.6
7.7
7.8
7.9
8
8.1
8.2
8.3
8.4
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110
Tempe ra ture (°C)
F
RC
(MHz)
Atmel ATmega644PA [DATASHEET]
Atmel-42717C-ATmega644PA_Datasheet_Complete-10/2016
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