ATMEGA8U2_14 Datasheet, PDF (281/310 Pages) ATMEL Corporation – 125 Powerful Instructions – Most Single Clock Cycle Execution

ATmega8U2/16U2/32U2
Figure 27-16. I/O Pin Input Threshold Voltage vs. V_CC (V_IL, I/O Pin read as ‘0’)
1.8
1.6
1.4
-40 °C
25 °C
85 °C
1.2
1
0.8
0.6
2.5 2.8 3.1 3.4 3.7
4
4.3 4.6 4.9 5.2 5.5
V_CC (V)
27.7 BOD Threshold
Figure 27-17. BOD Thresholds vs. Temperature (BODLEVEL is 2.7 V)
2.81
Rising Vcc
2.8
2.79
2.78
2.77
2.76
2.75
Falling Vcc
2.74
2.73
2.72
2.71
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
7799D–AVR–11/10
281