ABOV SEMICONDUCTOR MC81F4204 - External RC Oscillation Characteristics

MC81F4x16
April 24, 2012 Ver.1.41 35
7.12 External RC Oscillation Characteristics
(T
A
= - 40
°
C to + 85
°
C, V
DD
= 2.2 V to 5.0 V)
Parameter Symbol Conditions Min Typ. Max Units
RC oscillator freque-
ncy Range
(1)
fERC
T
A
= 25
°
C
1 – 8 MHz
V
DD
=5.0V, T
A
= 25
°
C
– 6 – + 6
Accuracy of RC
Oscillation
(2)
ACCERC
V
DD
=5.0V,
T
A
= – 40
°
C to + 85
°
C
– 12 – + 12
%
RC oscillator setup
time
(3)
tSUERC
T
A
= 25
°
C
– – 10 mS
NOTES:
1. The external resistor is connected between V
DD
and X
IN
pin and the 270pF capacitor is
connected between X
IN
and
V
SS
pin. (X
OUT
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
X IN
R
V DD V SS
270pF
Figure 7-8 External Clock