Datasheet

Electrical Characteristics
MC9S08LL16 Series MCU Data Sheet, Rev. 7
Freescale Semiconductor 29
Figure 16. Deviation of DCO Output from Trimmed Frequency (20 MHz, 3.0 V)
9C
Total deviation from trimmed DCO output frequency over
fixed voltage and temperature range of 0
° C to 70 ° C
Δf
dco_t
— ±0.5 ±1
%f
dco
10 C
FLL acquisition time
2
t
Acquire
—— 1ms
11 C
Long term jitter of DCO output clock (averaged over 2-ms
interval)
3
C
Jitter
— 0.02 0.2
%f
dco
1
Data in Typical column was characterized at 3.0 V, 25 °C or is typical recommended value.
2
This specification applies to any time the FLL reference source or reference divider is changed, trim value changed or
changing from FLL disabled (FBELP, FBILP) to FLL enabled (FEI, FEE, FBE, FBI). If a crystal/resonator is being used as
the reference, this specification assumes it is already running.
3
Jitter is the average deviation from the programmed frequency measured over the specified interval at 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 variation in the crystal oscillator frequency increase the C
Jitter
percentage for a given interval.
Table 12. ICS Frequency Specifications (Temperature Range = –40 to 85°C Ambient) (continued)
Num C Characteristic Symbol Min Typ
1
Max Unit