11

7607H–AVR–02/10

ATmega88/168 Automotive

Figure 2-16. Calibrated 8 MHz RC Oscillator Frequency versus Temperature

Figure 2-17. Calibrated 8 MHz RC Oscillator Frequency versus V

CC

Figure 2-18. Calibrated 8 MHz RC Oscillator Frequency versus OSCCAL Value

3.0V

2.7V

3.3V

4.5V

5.0V

5.5V

8.2

8.1

8.4

8.3

8.0

7.9

7.8

7.7

7.6

150

140

130

120

110

100

90

80

70

60

50

40

30

20

10

0

-10

-20

-30

-40

Temperature

8.2

8.1

8.4

8.3

8.0

7.9

7.8

7.7

7.6

6

5

4.5

5.5

2

3

2.5

4

3.5

12

10

16

14

8

6

4

2

192

176

256

240

224

208

112

96

80

160

144

128

64

48

32

16

0

0

OSCCAL (X1)