
520
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET]
8285E–AVR–02/2013
Figure 30-413.ATmega645A: Calibrated 8MHz RC Oscillator Frequency vs. V
CC
Figure 30-414.ATmega645A: Calibrated 8MHz RC Oscillator Frequency vs. Osccal Value
85 °C
25 °C
-45 °C
7.3
7.4
7.5
7.6
7.7
7.8
7.9
8
8.1
8.2
1.5
2
2.5
3
3.5
4
4.5
5
5.5
VCC (V)
F
RC
(M
Hz
)
85 °C
25 °C
-45 °C
2
4
6
8
10
12
14
16
18
016
32
48
64
8096
112 128 144 160 176 192 208 224 240 256
OSCCAL (X1)
F
RC
(M
Hz
)