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S3C8245/P8245/C8249/P8249 ELECTRICAL DATA
19-15
Table 19-14. Sub Oscillator(crystal) Stabilization Time (t
ST2
)
(T
A
= 25
°
C)
Oscillator Test Condition Min Typ Max Unit
Crystal Normal
mode
V
DD
=4.5V to 5.5V – 1 2 sec
V
DD
=2.0V to 4.5V – – 10 sec
Crystal Strong
mode
V
DD
=3.0V to 5.5V – – 6 sec
V
DD
=2.0V to 3.0V – – 2 sec
External clock V
DD
=2.0V to 5.5V
XT
IN
input high and low level width(t
XTH
, t
XTL
)
5 – 15 µs
NOTE: Oscillation stabilization time (t
ST2
) is the time required for the oscillator to it’s normal oscillation when stop mode
is released by interrupts.
10 MHz
f
CPU
3 MHz
1 MHz
1 2 3 4 5 6 7
Supply Voltage (V)
Minimum instruction clock = 1/4 x oscillator frequency
5.5
8 MHz
2.71.8
A
B
Figure 19-8. Operating Voltage Range