AT90S/LS2333 and AT90S/LS4433
85
External Clock Drive Waveforms
Figure 69. External Clock
Table 39. External Clock Drive
Symbol
Parameter
V
CC
= 2.7V to 6.0V
V
CC
= 4.0V to 6.0V
Units
Min
Max
Min
Max
1/t
CLCL
Oscillator Frequency
0
4
0
8
MHz
t
CLCL
Clock Period
250
125
ns
t
CHCX
High Time
100
50
ns
t
CLCX
Low Time
100
50
ns
t
CLCH
Rise Time
1.6
0.5
µ
s
t
CHCL
Fall Time
1.6
0.5
µ
s
VIL1
VIH1