Datasheet

ATmega32A
 2018 Microchip Technology Inc. Data Sheet Complete DS40002072A-page 288
28.3 Speed Grades
Figure 28-1. Maximum Frequency vs. V
CC
.
28.4 Clock Characteristics
28.4.1 External Clock Drive Waveforms
Figure 28-2. External Clock Drive Waveforms
28.4.2 External Clock Drive
2.7V 4.5V 5.5V
Safe Operating Area
16 MHz
8 MHz
V
IL1
V
IH1
Table 28-1. External Clock Drive
Symbol Parameter
V
CC
= 2.7V to 5.5VV
CC
= 4.5V to 5.5V
UnitsMinMaxMinMax
1/t
CLCL
Oscillator Frequency 0 8 0 16 MHz
t
CLCL
Clock Period 125 62.5 ns
t
CHCX
High Time 50 25 ns
t
CLCX
Low Time 50 25 ns
t
CLCH
Rise Time 1.6 0.5 s
t
CHCL
Fall Time 1.6 0.5 s
t
CLCL
Change in period from
one clock cycle to the
next
22%