MC81F4x16
7.12 Main clock Oscillator Characteristics
(T = - 40 C to + 85 C, V
= 2.2 V to 5.5 V)
DD
A
Oscillator
Parameter
Conditions
2.2 V – 5.5 V
2.7 V – 5.5 V
4.0 V – 5.5 V
2.2 V – 5.5 V
2.7 V – 5.5 V
4.0 V – 5.5 V
2.2 V – 5.5 V
2.7 V – 5.5 V
4.0 V – 5.5 V
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Typ.
–
Max
Units
4.2
8.0
Crystal
Main oscillation frequency
–
MHz
–
12.0
4.2
–
Ceramic
Oscillator
Main oscillation frequency
–
8.0
MHz
MHz
–
12.0
4.2
–
External
Clock
X
input frequency
–
8.0
IN
–
12.0
7.13 External RC Oscillation Characteristics
(T = - 40 C to + 85 C, V
A
= 2.2 V to 5.5 V)
DD
Parameter
Symbol
Conditions
Min
Typ.
Max Units
RC oscillator frequency
fERC
1
–
–
8
MHz
TA = 25 C
(1)
Range
V
=5.5V, T = 25 C
– 6
– 12
–
+ 6
DD
A
Accuracy of RC
ACCERC
tSUERC
%
V
DD
=5.5V,
(2)
Oscillation
–
–
+ 12
10
T = – 40 C to + 85 C
A
(3)
mS
RC oscillator setup time
TA = 25 C
Note :
1. The external resistor is connected between VDD and XIN pin and the 270pF capacitor is
connected between XIN and VSS pin. (XOUT pin can be used as a normal port). The frequency
is adjusted by external resistor.
2. The min/max frequencies are within the range of RC OSC frequency (1MHz to 8MHz)
3. Data based on characterization results, not tested in production
October 19, 2009 Ver.1.35
39
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