Rainbow Electronics ATmega162V - Manual (Page 266)

266
ATmega162/V
2513E–AVR–09/03
External Clock Drive
Waveforms Figure 115. External Clock Drive Waveforms
External Clock Drive
V
IL1
V
IH1
Table 113. External Clock Drive
Symbol Parameter
V
CC
= 1.8 - 5.5V V
CC
=2.7 - 5.5V V
CC
= 4.5 - 5.5V
Units Min. Max. Min. Max. Min. Max.
1/t
CLCL
Oscillator
Frequency
0 1 0 8 0 16 MHz
t
CLCL
Clock Period 1000 125 62.5 ns
t
CHCX
High Time 400 50 25 ns
t
CLCX
Low Time 400 50 25 ns
t
CLCH
Rise Time 2.0 1.6 0.5
µ
s
t
CHCL
Fall Time 2.0 1.6 0.5
µ
s
∆
t
CLCL
Change in
period from one
clock cycle to
the next
2 2 2 %