Datasheet

470
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
Figure 29-235.Atmel ATmega644A: Calibrated 8MHz RC oscillator vs. temperature.
Figure 29-236.Atmel ATmega644A: Calibrated 8MHz RC oscillator vs. OSCCAL value.
5.0V
3.0V
7.6
7.7
7.8
7.9
8.0
8.1
8.2
8.3
8.4
-40 -30 -20 -10 0 10 20 304050607080 90 100 110 120
Temperature [°C]
F
RC
[MHz]
85°C
25°C
-40°C
0
2
4
6
8
10
12
14
16
0163248 64 8096112128 144 160 176 192 208 224 240
OSCCAL [X1]
F
RC
[MHz]