ATMEGA128-16AU SL383 Atmel, ATMEGA128-16AU SL383 Datasheet - Page 320

• Manufacturer Part Number: ATMEGA128-16AU SL383
• Manufacturer: Atmel

Speed Grades
External Clock
Drive Waveforms
External Clock
Drive
320
ATmega128
Figure 152. Maximum frequency vs. V
Figure 153. External Clock Drive Waveforms
Table 131. External Clock Drive
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from
one clock cycle to the
next
16 MHz
8 MHz
V
IL1
V
IH1
2.7V
V
Min
CC
125
50
50
CC
0
= 2.7V to
Safe Operating Area
Max
1.6
1.6
5.5
8
2
V
4.5V
V
62.5
CC
Min
25
25
0
= 4.5V to
Max
0.5
0.5
16
5.5
5.5V
2
V
Units
MHz
2467S–AVR–07/09
ns
ns
ns
μs
μs
%