Datasheet

332
8018P–AVR–08/10
ATmega169P
Figure 28-2. Maximum Frequency vs. V
CC
, ATmega169P
28.4 Clock Characteristics
28.4.1 Calibrated Internal RC Oscillator Accuracy
Notes: 1. Voltage range for ATmega169PV.
2. Voltage range for ATmega169P.
28.4.2 External Clock Drive Waveforms
Figure 28-3. External Clock Drive Waveforms
1
6 MHz
8 MHz
2.7V 4.5V 5.5V
Safe Operating Area
Table 28-2. Calibration Accuracy of Internal RC Oscillator
Frequency V
CC
Temperature Calibration Accuracy
Factory Calibration 8.0 MHz 3V 25°C±10%
User Calibration
7.3 MHz - 8.1 MHz
1.8V - 5.5V
(1)
2.7V - 5.5V
(2)
-40°C - 85°C±1%
V
IL1
V
IH1