MC9S08QG8 Datasheet, PDF (267/300 Pages) Freescale Semiconductor, Inc – 8-BIT HCS08 Central Processor Unit

Appendix A Electrical Characteristics
Table A-7. XOSC and ICS Specifications (Temperature Range = –40 to 85°C Ambient)
Characteristic
Symbol
Min
Typ¹
Max
Unit
Total deviation of DCO output from trimmed frequency⁴
At 8 MHz over full voltage and temperature range
At 8 MHz and 3.6 V from 0 to 70°C
∆f_{dco_t}
—
–1.0 to +0.5 ± 2
%f_dco
±0.5
±1
FLL acquisition time ^4,6
t_Acquire
1.5
ms
Long term jitter of DCO output clock (averaged over 2-ms interval) ^{7 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 _{When ICS is configured for FEE or FBE mode, input clock source must be divisible using RDIV to within the range of 31.25 kHz}
to 39.0625 kHz.
3 _{See crystal or resonator manufacturer’s recommendation.}
4 _{This parameter is characterized and not tested on each device.}
5 _{Proper PC board layout procedures must be followed to achieve specifications.}
6 _{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.
7 _{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.
EXTAL
XOSC
R_F
XTAL
R_S
Crystal or Resonator
C₁
C₂
Figure A-7. Typical Crystal or Resonator Circuit
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 1.01
Freescale Semiconductor
267