Relaxation Oscillator Timing
10.7 Relaxation Oscillator Timing
Table 10-12 Relaxation Oscillator Timing
Characteristic
Symbol
Minimum
Typical
Maximum
Unit
Relaxation Oscillator output frequency1
Normal Mode
Standby Mode
fop
—
—
8.05
200
MHz
kHz
Relaxation Oscillator stabilization time2
troscs
—
—
1
3
µs
ps
Cycle-to-cycle jitter. This is measured on the
CLKO signal (programmed prescaler_clock)
tjitterrosc
400
over 264 clocks3
Minimum tuning step size
Maximum tuning step size
.08
40
%
%
%
Variation over temperature -40°C to 150°C4
Variation over temperature 0°C to 105°C4
+1.0 to -1.5 +3.0 to -3.0
0 to +1 +2.0 to -2.0
%
1. Output frequency after application of 8MHz trim value, at 125°C.
2. This is the time required from standby to normal mode transition.
3. J is required to meet SCI requirements.
A
4. See Figure 10-5.
8.16
8.08
8
7.92
7.84
-50
-25
0
25
50
75
100
125
150
175
Degrees C (Junction)
Figure 10-5 Relaxation Oscillator Temperature Variation (Typical) After Trim at 125°C
56F8014 Technical Data, Rev. 9
Freescale Semiconductor
Preliminary
99
FREESCALE [ Freescale ]
