MC81F4104
7.11 Internal RC Oscillation Characteristics
(T = - 40 C to + 85 C, V
DD
= 2.2 V to 5.5 V)
A
Parameter
Symbol
Conditions
=5.5V, T = 25 C
Min
Typ.
Max
Units
V
DD
-4%
8.0
4%
A
RC oscillator
frequency (1)
fIRC
MHz
V
=5.5V,
DD
-20%
8.0
20%
T = – 40 C to + 85 C
A
Clock duty ratio
TOD
–
40
50
60
10
%
RC oscillator setup
T = 25 C
tSUIRC
–
–
mS
A
(2)
time
NOTES:
1. Data based on characterization results, not tested in production
2. X and X pins can be used as I/O ports.
IN
OUT
7.12 Main Oscillation Stabilization Time
(T = - 40 C to + 85 C, V
A
= 2.2 V to 5.5 V)
DD
Oscillator
Conditions
Min
Typ.
Max
60
Units
Crystal
fx > 1 MHz
–
–
mS
Oscillation stabilization occurs when
is equal to the minimum
V
DD
oscillator voltage range.
input high and low width (t , t
Ceramic
–
–
10
mS
nS
X
)
External Clock
40.0
–
480
IN
XH XL
1 / fx
tXL
tXH
0.8VDD
XIN
0.2VDD
Figure 7-8 Clock Timing Measurement at XIN
October 19, 2009 Ver.1.35
27
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