Pin Thresholds And Hysteresis - Atmel ATmega128 Manual

Pin Thresholds and
Hysteresis
ATmega128
346
Figure 186. I/O Pin Input Threshold Voltage vs. V
2.2
2
1.8
1.6
1.4
1.2
1
2.5
Figure 187. I/O Pin Input Threshold Voltage vs. V
1.6
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
2.5
I/O PIN INPUT THRESHOLD VOLTAGE vs. V
VIH, IO PIN READ AS '1'
3 3.5 4
V (V)
CC
I/O PIN INPUT THRESHOLD VOLTAGE vs. V
VIL, IO PIN READ AS '0'
3 3.5 4
V (V)
CC
(VIH, I/O Pin Read as '1')
CC
CC
4.5 5
(VIH, I/O Pin Read as '0')
CC
CC
4.5 5
-40 °C
25 °C
85 °C
5.5
-40 °C
25 °C
85 °C
5.5
2467S–AVR–07/09