MC81F4204 Datasheet, PDF (34/150 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC81F4x16
7.12 Internal RC Oscillation Characteristics
(T_A = - 40 ^C to + 85^C, V_DD = 2.2 V to 5.5 V)
Parameter
Symbol
Conditions
RC oscillator
frequency (1)
fIRC
VDD =5.5V, TA = 25^C
VDD =5.5V,
TA = – 40^C to + 85^C
Clock duty ratio
TOD
–
RC oscillator setup
time ⁽²⁾
tSUIRC
TA = 25^C
Min
-4%
-20%
40
–
Typ.
8.0
8.0
50
–
Max
4%
20%
60
10
Units
MHz
%
mS
NOTES:
1. Data based on characterization results, not tested in production
2. X_IN and X_OUT pins can be used as I/O ports.
7.13 Main Oscillation Stabilization Time
(T_A = - 10 ^C to + 70^C, V_DD = 2.2 V to 5.5 V)
Oscillator
Conditions
Min
Crystal
fx > 1 MHz
–
Oscillation stabilization occurs when
Ceramic
VDD is equal to the minimum
–
oscillator voltage range.
External Clock
XIN input high and low width (tXH,
tXL)
40.0
Typ.
–
–
–
Max
60
10
480
Units
mS
mS
nS
1 / fx
t XL
tXH
XIN
0.8VDD
0.2VDD
Figure 7-9 Clock Timing Measurement at XIN
34
October 19, 2009 Ver.1.35