MC9S08LL64_10 Datasheet, PDF (27/44 Pages) Freescale Semiconductor, Inc – Technical Data

AC 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 of trimmed DCO output frequency over
voltage and temperature
Δf_{dco_t}
—
+ 0.5
–1.0
±2 %f_dco
10
C
Total deviation of trimmed DCO output frequency over fixed
voltage and temperature range of 0 °C to 70 °C
Δf_{dco_t}
—
± 0.5
±1 %f_dco
11 C FLL acquisition time²
t_Acquire
—
—
1
ms
12
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 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 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)
3.10 AC Characteristics
This section describes timing characteristics for each peripheral system.
MC9S08LL64 Series MCU Data Sheet, Rev. 5
Freescale Semiconductor
27