Datasheet

AC Characteristics
MC9S08SF4 Series MCU Data Sheet, Rev. 4
Freescale Semiconductor 17
Figure 13. Deviation of DCO Output from Trimmed Frequency (20 MHz, 5.0 V)
3.9 AC Characteristics
This section describes AC timing characteristics for each peripheral system.
1
Data in the Typical column was characterized at 5.0 V, 25 C, or the typical recommended value.
2
This parameter is characterized and not tested on each device.
3
This specification applies to any time the FLL reference source or reference divider is changed, trim value changed,
DMX32 bit changed, DRS bit changed, or changing from FLL disabled (FBELP, FBILP) to FLL enabled (FEI, FEE, FBE,
and FBI). If a crystal/resonator is being used as the reference, this specification assumes it is already running.
4
Jitter is the average deviation from the programmed frequency measured over the specified interval at the maximum
f
Bus
. Measurements are made with the device powered by filtered supplies and clocked by a stable external clock signal.
Noise injected into the FLL circuitry via V
DD
and V
SS
and a variation in the crystal oscillator frequency increases the
C
Jitter
percentage for a given interval.
TBD
-2.00%
-1.50%
-1.00%
-0.50%
0.00%
0.50%
1.00%
-60 -40 -20 0 20 40 60 80 100 120
Temperature
Deviation (%)