Datasheet
400
2549O–AVR–05/12
ATmega640/1280/1281/2560/2561
Figure 32-27. I/O Pin Input Threshold Voltage vs. V
CC
(V
IL
, IO Pin Read as “0“)
Figure 32-28. I/O Pin Input Hysteresis
85°C
25°C
-40°C
0
0.5
1
1.5
2
2.5
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
Thresh o l d (V)
85°C
25°C
-40°C
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
Input Hyst
eres
is (mV)