MC9S08LL16_10 Datasheet, PDF (29/44 Pages) Freescale Semiconductor, Inc – MC9S08LL16 Series

Electrical Characteristics
Table 12. ICS Frequency Specifications (Temperature Range = –40 to 85C Ambient) (continued)
Num C
Characteristic
Symbol Min
Typ¹
Max Unit
9
C
Total deviation from trimmed DCO output frequency over
fixed voltage and temperature range of 0C to 70 C
f_{dco_t}
—
0.5
1 %f_dco
10 C _{FLL acquisition time} ²
t_Acquire
—
—
1
ms
Long term jitter of DCO output clock (averaged over 2-ms
11 C _{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 fBus.}
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.
Figure 16. Deviation of DCO Output from Trimmed Frequency (20 MHz, 3.0 V)
MC9S08LL16 Series MCU Data Sheet, Rev. 6
Freescale Semiconductor
29