Datasheet

493
8272A–AVR–01/10
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Figure 28-284.ATmega644PA: Calibrated 8 MHz RC Oscillator vs. Temperature
Figure 28-285.ATmega644PA: Calibrated 8 MHz RC Oscillator 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
-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 80 96 112 128 144 160 176 192 208 224 240
OSCCAL (X1)
F
RC
(MHz)