
490
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
Figure 29-272.Atmel ATmega644PA: I/O pin input hysteresis vs. V
CC.
Figure 29-273.Atmel ATmega644PA: Reset pin input threshold vs. V
CC (VIH , I/O pin read as ‘1’).
85°C
25°C
-40°C
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
VCC [V]
Inp
u
tHy
s
tere
s
is
[mV]
1.5
4.0
3.5
3.0
2.5
2.0
5.5
5.0
4.5
85°C
25°C
-40°C
0
0.5
1.0
1.5
2.0
2.5
VCC [V]
Thre
s
hol
d
[
V
]
1.5
4.0
3.5
3.0
2.5
2.0
5.5
5.0
4.5