Atmel ATmega128

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