Datasheet

Figure 30-37. Watchdog Oscillator Frequency vs. V
CC
108
109
110
111
112
113
114
115
116
117
118
119
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
F
RC
(kHz)
-40
o
C
25
o
C
85
o
C
Figure 30-38. Calibrated 8MHz RC Oscillator vs. V
CC
7.2
7.4
7.6
7.8
8
8.2
8.4
2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
F
RC
(MHz)
85
o
C
25
o
C
-40
o
C
Figure 30-39. Calibrated 8MHz RC Oscillator vs. Temperature
5.0 V
3.0 V
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 90 100 110 120
Tempe ra ture (°C)
F
RC
(MHz)
Atmel ATmega644A [DATASHEET]
Atmel-42716C-ATmega644A_Datasheet_Complete-10/2016
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