521
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
29.7.11
Internal oscillator speed
Figure 29-331.Atmel ATmega1284: Watchdog oscillator frequency vs. temperature.
Figure 29-332.Atmel ATmega1284: Watchdog oscillator frequency vs. V
CC.
5.5V
4.0V
3.3V
2.7V
113
114
115
116
117
118
119
120
121
122
123
-40
-30
-20
-10
0
10
20
3040
5060
70
8090
Temperature [°C]
F
RC
[k
Hz
]
85°C
25°C
-40°C
114
116
118
120
122
124
VCC [V]
F
RC
[k
Hz
]
4.0
3.5
3.0
2.5
2.0
5.5
5.0
4.5