MC81F4x16
7.14 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
fIRC
MHz
20%
V
=5.5V,
DD
frequency (1)
-20%
8.0
T = – 40 C to + 85 C
A
Clock duty ratio
TOD
–
40
50
60
10
%
RC oscillator setup
tSUIRC
T = 25 C
–
–
mS
A
(2)
time
Note :
1. Data based on characterization results, not tested in production
2. X and X pins can be used as I/O ports.
IN
OUT
7.15 Sub clock Oscillator Characteristics
(T = - 40 C to + 85 C, V
A
= 2.2 V to 5.5 V)
DD
Oscillator
Parameter
Conditions
2.2 V – 5.5 V
2.2 V – 5.5 V
Min
32
Typ.
Max
35
Units
KHz
Crystal
Sub oscillation frequency
32.768
SX input frequency
External Clock
32
–
100
KHz
IN
7.16 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
Units
Crystal
fx > 1 MHz
–
–
–
–
60
mS
Oscillation stabilization occurs when
is equal to the minimum
V
DD
Ceramic
–
10
mS
nS
oscillator voltage range.
input high and low width (t , t
X
)
XH XL
External Clock
40.0
480
IN
44
October 19, 2009 Ver.1.35
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