MC9S08PT16 Datasheet, PDF (19/33 Pages) Freescale Semiconductor, Inc – MC9S08PT16

Peripheral operating requirements and behaviors
Table 9. XOSC and ICS specifications (temperature range = -40 to 105 °C ambient)
(continued)
Num C
Characteristic
Symbol
Min
11 P Total deviation
Over full voltage and
Δf_{dco_t}
—
of DCO output
temperature range
C
from trimmed
frequency⁵
Over fixed voltage and
temperature range of 0 to
70 °C
12 C
FLL acquisition time⁵, ⁷
t_Acquire
—
13 C
Long term jitter of DCO output clock
C_Jitter
—
(averaged over 2 ms interval)⁸
Typical¹
—
—
0.02
Max
±2.0
±1.0
Unit
%f_dco
2
ms
0.2
%f_dco
1. Data in Typical column was characterized at 5.0 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. Load capacitors (C₁,C₂), feedback resistor (R_F) and series resistor (R_S) are incorporated internally when RANGE = HGO =
0.
5. This parameter is characterized and not tested on each device.
6. Proper PC board layout procedures must be followed to achieve specifications.
7. This specification applies to any time the FLL reference source or reference divider is changed, trim value changed,
DMX32 bit is changed, DRS bit is 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.
8. 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 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 11. Typical crystal or resonator circuit
MC9S08PT16 Series Data Sheet, Rev. 1, 7/4/2012.
Freescale Semiconductor, Inc.
19