User Manual

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ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
8271E–AVR–07/2012
Figure 30-320.ATmega328: Calibrated 8MHz RC Oscillator Frequency vs. Temperature
Figure 30-321.ATmega328: Calibrated 8MHz RC Oscillator Frequency vs. OSCCAL Value
5.0 V
3.0 V
7.6
7.7
7.8
7.9
8
8.1
8.2
8.3
8.4
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 8090100
Temperature (°C)
F
RC
(MHz)
85 °C
25 °C
-40 °C
0
2
4
6
8
10
12
14
16
0163248 64 80 96 112 128 144 160 176 192208 224 240 256
OSCCAL (X1)
F
RC
(MHz)