Atmel ATmega48PV Manual page 342

27.1.9 Pin Threshold and Hysteresis
8025I–AVR–02/09
Figure 27-25. I/O Pin Input Threshold Voltage vs. V
3
2.5
2
1.5
1
0.5
0
1.5 2
Figure 27-26. I/O Pin Input Threshold Voltage vs. V
2.5
2
1.5
1
0.5
0
1.5 2
ATmega48P/88P/168P/328P
CC
I/O PIN INPUT THRESHOLD VOLTAGE vs. V
VIH, IO PIN READ AS '1'
2.5 3 3.5
V (V)
CC
CC
I/O PIN INPUT THRESHOLD VOLTAGE vs. V
VIL, IO PIN READ AS '0'
2.5 3 3.5
V (V)
CC
(V , I/O Pin read as '1').
IH
CC
4 4.5 5
(V , I/O Pin read as '0').
IL
CC
4 4.5 5
85 °C
25 °C
-40 °C
5.5
85 °C
25 °C
-40 °C
5.5
342