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S3C9444/F9444_UM_REV1.10
°
(T
= – 25
C to + 85
A
Oscillator
Main crystal or
ceramic
External clock
(Main System)
External RC
oscillator
°
(T
= - 25
C to + 85
A
Oscillator
Main crystal
Main ceramic
External clock
(main system)
Oscillator
stabilization
wait time
NOTES:
1.
f
is the oscillator frequency.
OSC
The duration of the oscillator stabilization wait time, t
2.
settings in the basic timer control register, BTCON.
Table 12-4. Oscillator Characteristics
°
C)
Clock Circuit
X
IN
C1
X
C2
OUT
X
IN
X
OUT
–
Table 12-5. Oscillation Stabilization Time
°
C, V
= 3.0 V to 5.5 V)
DD
Test Condition
f
> 1.0 MHz
OSC
Oscillation stabilization occurs when V
equal to the minimum oscillator voltage range.
X
input high and low width (t
IN
t
when released by a reset
WAIT
t
when released by an interrupt
WAIT
Test Condition
V
= 4.5 to 5.5 V
DD
V
= 2.7 to 4.5 V
DD
V
= 2.0 to 2.7 V
DD
V
= 4.5 to 5.5 V
DD
V
= 2.7 to 4.5 V
DD
V
= 2.0 to 2.7 V
DD
is
DD
, t
)
XH
XL
(1)
(2)
, when it is released by an interrupt is determined by the
WAIT
ELECTRICAL DATA
Min
Typ
1
–
1
–
1
–
1
–
1
–
1
–
–
4
Min
Typ
Max
–
–
–
–
25
–
500
16
2
/f
–
OSC
–
–
Max
Unit
10
MHz
6
MHz
3
MHz
10
MHz
6
MHz
3
MHz
–
MHz
Unit
20
ms
10
ms
ns
–
ms
–
ms
12-5
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